Display settings on start up

mac os tiger detects my dell m992 display with no problem; however, i find myself having to re-detect the display each time i restart tiger....is there a setting or backend command i need to type in terminal so i don't have to keep re-detecting my monitor?
thanks for your help...
-john m.

Try this. Start up, redetect the display, delete the /Library/Preferences/com.apple.windowserver.plist, restart, redetect the display, and restart. If that doesn't do it, then zap the PRAM (CMDOPT+PR) and try again.

Similar Messages

VGA CRT will not "wake up".. help please. Reset display settings shortcut?

Hello everybody,
I have a mirror drive doors G4 Tower, Dual 1.25 GHz.
I have an ADC and a DVI out from the computer. Just had damage to my old studio display so I am attempting to use just one CRT running from the DVI... w/ a DVI to VGA adapter.
The first time I tried this w/ a CRT it worked fine... I played around w/ monitor settings... still worked fine. Shut down... unhooked CRT and moved that CRT away.
Tried using it with another CRT and the new CRT never started up... remained on stand-by/sleep.
I tried with another moniter... this time a LCD/Flatscreen... again VGA and it did the same thing, EXCEPT... this time when I connected the LCD to the adapter and then plugged the adapter into the DVI on my tower the LCD screen would turn on for about 1 second and display my login page. The picture was not perfect though... it was distorted someway.
Went back to the first CRT... now this one didn't work.
I think that maybe I have to reset my display settings with some sort of shortcut or something... maybe it's on the wrong frequency?
I don't know... any help much appreciated. I hate having to use this PC.
Thanks,
James

Turned out to be a faulty DVI to VGA adapter.

VGA CRT will not "wake up"... help please. Reset display settings?

Hello everybody,
I have a mirror drive doors G4 Tower, Dual 1.25 GHz.
I have an ADC and a DVI out from the computer. Just had damage to my old studio display so I am attempting to use just one CRT running from the DVI... w/ a DVI to VGA adapter.
The first time I tried this w/ a CRT it worked fine... I played around w/ monitor settings... still worked fine. Shut down... unhooked CRT and moved that CRT away.
Tried using it with another CRT and the new CRT never started up... remained on stand-by/sleep.
I tried with another moniter... this time a LCD/Flatscreen... again VGA and it did the same thing, EXCEPT... this time when I connected the LCD to the adapter and then plugged the adapter into the DVI on my tower the LCD screen would turn on for about 1 second and display my login page. The picture was not perfect though... it was distorted someway.
Went back to the first CRT... now this one didn't work.
I think that maybe I have to reset my display settings with some sort of shortcut or something... maybe it's on the wrong frequency?
I don't know... any help much appreciated. I hate having to use this PC.
Thanks,
James
G4 Dual 1.25 Mirrored Drive Doors Mac OS X (10.4.5) Some NvDia card
G4 Dual 1.25 Mirrored Drive Doors Mac OS X (10.4.5) Some Nvidia Graphics card w/ DVI to VGA adapter

Can you start up in "safe mode"? If so, you can reset your display settings and reboot. If not, you have a problem either with your video card or your DVI/VGA adaptor

Monitor says VIDEO MODE NOT SUPPORTED after changing display settings

HELP! I am about to have a nervous breakdown with my mac mini! I hooked up the mac to my Philips LCD via DVI. No problem at all. But because the screen is only 15" I wanted to play around with the display settings a bit. So I changed the resolution from it's original 1204x768 to the one higher (not sure of numbers) and to my HORROR, I now can't get any picture at all - it says "VIDEO MODE NOT SUPPORTED". I have tried everything I can think of. I have rest the P-RAM, I have unplugged all cables, plugged the back in again, I bought the mac into work and hooked it up to my monitor and changed the resolution back to 1024x768 which is what it was on originally and that STILL didn't work. I can see the Apple logo and then it goes black and comes up with the error message. HELP! What am I doing wrong - I can't believe one click of a mouse button has rendered my display useless!!!

Welcome to Apple Discussions!
Try booting the mini without the display connected, and then, once the system is running, connect the display. This will often force the system to default to a low resolution, and then correctly detect the display when it is connected.
If that doesn't help, with the display connected, boot into safe mode (hold the shift key down when starting up) and once the system is running, change the resolution to 1024x768, and ensure the correct refresh rate is selected. Rebooting normally ought then to give you a good display.
If all else fails, boot into safe mode with the display connected, and then in the Finder's file menu, use the 'find' option to search for 'windowserver' (no quotes). You should get 2 or 3 results, including one with a string of alphanumeric characters. Move all of them to the trash and restart normally.

Display settings

Hi Experts,
Is there any other classes available for display settings in ALV other than the below mentioned.The following classes doesn't works in SAP 5.0.
Is this belongs to NetWeaver family?
cl_salv_table
cl_salv_functions
cl_salv_display_settings
Can any one pls help it out to do the same in abap objects?
Regards,
User

Hello Raj
If you are indeed working on an ECC 5.0 system then I do not see where the problem is. The following sample report ZUS_SDN_CL_SALV_TABLE_DISPLAY demonstrates how to adjust the layout of the ALV list. In addition, you see the coding for event handling and column adjustment.
*& Report ZUS_SDN_CL_SALV_TABLE_DISPLAY
REPORT zus_sdn_cl_salv_table_display.
TYPE-POOLS: abap.
DATA:
gt_knb1 TYPE STANDARD TABLE OF knb1.
DATA:
go_table TYPE REF TO cl_salv_table,
go_events TYPE REF TO cl_salv_events_table,
go_columns TYPE REF TO cl_salv_columns_table,
go_column TYPE REF TO cl_salv_column,
go_display TYPE REF TO cl_salv_display_settings.
PARAMETERS:
p_outlen TYPE lvc_outlen DEFAULT '20',
p_title TYPE lvc_title DEFAULT 'New Grid Title'.
* CLASS lcl_eventhandler DEFINITION
CLASS lcl_eventhandler DEFINITION.
PUBLIC SECTION.
 CLASS-METHODS:
 handle_double_click FOR EVENT
 if_salv_events_actions_table~double_click
 OF cl_salv_events_table
 IMPORTING
 row
 column.
ENDCLASS. "lcl_eventhandler DEFINITION
* CLASS lcl_eventhandler IMPLEMENTATION
CLASS lcl_eventhandler IMPLEMENTATION.
METHOD handle_double_click.
* define local data
 DATA:
 ls_knb1 TYPE knb1.
 READ TABLE gt_knb1 INTO ls_knb1 INDEX row.
 IF ( syst-subrc = 0 ).
 SET PARAMETER ID 'BUK' FIELD ls_knb1-bukrs.
 SET PARAMETER ID 'KUN' FIELD ls_knb1-kunnr.
 CALL TRANSACTION 'XD03' AND SKIP FIRST SCREEN.
 ENDIF.
ENDMETHOD. "handle_double_click
ENDCLASS. "lcl_eventhandler IMPLEMENTATION
START-OF-SELECTION.
SELECT * FROM knb1 INTO TABLE gt_knb1
 WHERE bukrs = '1000'.
* Create ALV grid instance
TRY.
 CALL METHOD cl_salv_table=>factory
* EXPORTING
* LIST_DISPLAY = IF_SALV_C_BOOL_SAP=>FALSE
* R_CONTAINER =
* CONTAINER_NAME =
 IMPORTING
 r_salv_table = go_table
 CHANGING
 t_table = gt_knb1.
 CATCH cx_salv_msg .
ENDTRY.
* Create event instance
go_events = go_table->get_event( ).
* Set event handler
SET HANDLER:
 lcl_eventhandler=>handle_double_click FOR go_events.
PERFORM adjust_column.
PERFORM adjust_display.
go_table->display( ).
END-OF-SELECTION.
*& Form ADJUST_COLUMN
* text
* --> p1 text
* <-- p2 text
FORM adjust_column .
CHECK ( p_outlen > 0 ). " In this case use default output length
* Get columns instance
go_columns = go_table->get_columns( ).
* Get single column instance
TRY.
 go_column = go_columns->get_column( 'LOEVM' ). " delete flag
 go_column->set_output_length( p_outlen ).
 CATCH cx_root.
ENDTRY.
ENDFORM. " ADJUST_COLUMN
*& Form ADJUST_DISPLAY
* text
* --> p1 text
* <-- p2 text
FORM adjust_display .
go_display = go_table->get_display_settings( ).
go_display->set_striped_pattern( abap_true ).
go_display->set_list_header( p_title ).
ENDFORM. " ADJUST_DISPLAY
Regards
Uwe

Mac Mini display settings change after shutdown

After a shutdown, my Mac Mini's display settings will change on startup. This happens about 80% to 90% of the time.
Sometimes it may be due to playing a video game (Diablo 3) where the resolution in the game is slightly lower. The Mac Mini is set to 1080p, but in-game it is 1600x900. After playing a game, maybe half the time, when I go back to my desktop, the display looks different. However, even other times even when I wasn't playing a game, after a shutdown, the display settings will change.
The strange thing is that it isn't a change in resolution. The resolution stays the same. It is always 1080p after every shutdown. But something in the display changes. Curved shaped look more pixelized, like some kind of smoothing or antialiasing has been turned off. And bright things are too bright, dark things too dark, so images lose some detail. It is also a bit painful on the eyes. Everything looks less vivid and very dull.
Someone in an older post suggested changing refresh rates. Unfortunately, my Mac Mini doesn't show that option. It was also suggested to connect to a different monitor to possibly make the options appear. But I don't have another monitor.
My current solution is to reset NVRAM (command+option+P+R) on startup. It seems to reset the display settings and fixes the display problem 100% of the time. But the thing is, I have to now keep doing this almost everytime I start up my Mac, which is annoying.
Is there a way to ensure that the Mac Mini keeps my display settings and prevent it from losing them on startup? Or perhaps, a way to reset display settings from within the OS without having to shutdown again and reset NVRAM?

hey p26grinz,
without the external monitor and after setting the display, will the setting remain ?
have you tried uninstalling the graphic driver from your unit and then testing it with generic driver ?
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Odd desktop/display bug - how to reset user display settings?

Greetings all,
I woke up yesterday morning to a puzzling problem with my G5. I logged in and started working - and I needed to use the windows remote desktop client to shell into a machine at work. I noticed that the fonts looked sort of funny (randomly quished) so I logged out and then back in. Then I noticed that the problem was not in the RDC display, but in the display of my mac.
This is sort of hard to describe w/out actually seeing it, but here goes...
When I move my mouse across the desktop (or what ever apps I have open) and the mouse pointer moves across and invisible (yet perceptible) line on my screen real estate, my background, icons, parts of displayed apps and fonts "shift". This causes fonts in the affected are to get messed up and causes general display irritation. That's the best way I can describe it, it's sort of a "you have to see it" problem. I will also note that this problem did not arise after an update or a software install or weird crash. Just another day.
So first I tried messing with my display settings (change resolution, color profiles, setting the background to a solid color, turning off screen saver). Rebooting. Nothing. Still there.
So next I log into another account (the root account). Ah ha! No display problems! Tried creating another user-level account. No problems there either. Now we're getting somewhere - it's something that is effecting my main user account and not a problem with my monitor, video card or OS. That's good.
So since then I've tried:
- Grooming the disc that my home directory lives on with DiskWarrior.
- Repaired permissions.
- Deleting the contents of home/Library/Fonts in case it's some funky font rendering issue causing this.
- Deleted the contents of home/Library/Preferences/MicroSoft to get any of its potential badness out of my life.
- Scanning with FontDoctor looking for bad fonts.
- Deleted my desktop and finder plist files.
- General maintenance and cache cleaning (including the MS font cache) with Onyx.
- Booting to Safe Mode.
Nothing. The display problem persists afflicting that one user account. All other accounts (root, and a second user-level account residing on the same disc) are free of these problems even though they are all using the same display settings (monitor, resolution, color profiles, etc). And as already noted, this problem was not "brought on" by anything like an update, installation, preferences modification or fatal seeming crash of an app.
So, my question to all you good people is: what am I missing, what might be causing this and what else can be scrubbed from that account (cache, plist files, etc etc) that might be harboring and causing this display bug? I would really rather solve this problem than go through the very very arduous task of moving all of my stuff to another account (an option, but a very unattractive one).
I was not a mac user during the OS 9 days, but I remember my co-workers doing the "rebuilding the desktop" dance. I realize that this is no longer an issue, but I guess I'm looking for something like that. I need to remove any and everything from my user account that has anything to do with display and font rendering since it's obviously some setting lurking in that account causing the issue.
I googled and searched the forums for this yesterday but could not come up with anything like it and all of the maintenance tasks I tried have not worked.
Any ideas?
Cheers,
Monte
G5 Mac OS X (10.4.9)

Hi.
What kind of G5 do you have? An iMac or a PowerMac?
A PowerMac.
If you own a PowerMac, you'd better take a look (o
try with another one) at the DVI cable connecting the
display.
I did check my connections, but also, why would a faulty DVI cable only cause problems with a single user account and none of the others?
If you want to reset the display settings, start in
Safe Mode, and trash these files:
/Library/Preferences/com.apple.windowserver.plist
/Users/yourusername/Library/Preferences/ByHost/com.a
pple.windowserver.some_number.plist
If I were at home now, I would try and report back. But I'm not. I'll definitely give it a try as soon as I can. Thanks for the pointer!
Cheers,
M

Hide Display Settings not applied in User GPO

Hello,
I am trying to hide the display settings via a GPO so folks can't change the resolution. I set the "Disable the Display Control Panel" setting to enable, but users can still go to the Control Panel and change the display settings. Other parts of
the GPO are applying, like the Ctrl+Alt+Del settings. The GPO has the loopback function set to replace. From my understanding, that should force all user settings in that GPO on everyone who logs into the computer, whether they are in that OU or not.
Some settings apply, just not the Display settings. Is there something else I have to enable to get that working?
Thanks
Jason Watkins MCSE, MCSA, MCDBA, CCNA

Hi Jason,
It's been a while. How is it going? If it still doesn't work out, we can run command
gpresult/h report.html to collect group policy result to check this. Note: to collect computer part group policy settings, we need to run the command with administrative privileges.
In addition, regarding troubleshooting group policy issues, the following thread can be referred to as reference.
[Forum FAQ] Common steps to start troubleshooting Group Policy application issues
https://social.technet.microsoft.com/Forums/windowsserver/en-US/382c97e8-93c8-4022-b8fe-22401037d14c/forum-faq-common-steps-to-start-troubleshooting-group-policy-application-issues?forum=winserverGP
Best regards,
Frank Shen
Please remember to mark the replies as answers if they help and unmark them if they provide no help. If you have feedback for TechNet Subscriber Support, contact [email protected]

Permanent Crash related to changing display settings while FCP is open.

Recently, the display settings (arrangement) on my two monitors started changing by itself while I was working in FCP 6.5. I'm using ancient monitors (Viewsonic MB90 and Mitsubishi Diamond Pro 920. I just don't have the money to upgrade right now). Tis was annoying but I dealt with the problem by creating two different windows layouts. Then things got worse (the only thing I had done was install 8 gigs of additional memory on top of the original 2). FCP started crashing and now I can't even open the application. It doesn't react.
Apple recently posted a not very informative acknowledgement of the problem with changing display settings while FCP is open, but it doesn't suggest solutions to my problem. It would be helpful to know a) what resolution and refresh rates are best for these old monitors and b)how to open FCP again. Your help is greatly appreciated.
FCP 6.5
2x3g quad core xeon
Thanks,
Alex

THIS IS IT!
Disabling the nVidia deep colors for 3d applications solved the uber-annoying "flicker-screen-settings-and-disrupt/crash-other-programs" issue. I specifically only disabled deep colors for Premiere, not for all 3d applications I use, because none of them have caused the same problem as Premiere.
This display-screen setting issue probably occurred because I use a Dell u3011 monitor which displays Adobe RGB color gamut, not just sRGB.
However, now this brings up another question with disabling deep colors (effectively disabling the Adobe RGB use of the Dell monitor):
QUESTION: If I have CG-rendered frames that seem to be created in sRGB and Adobe RGB (in two different programs), what color space should I be mixing/editing them in?
I'm somewhat of a novice with the color spectrum/gamut issue. From what I understand, if I edit both CG images in sRGB, I'll be losing color data from the Adobe RGB-created CG image. If I edit both CG images in Adobe RGB, will I create minor banding effects on the sRGB image because it doesn't have the color range that I'm editing in? Perhaps my question is more relevant to AfterEffects compositing of the images rather than simply/only editing them in Premiere.
The end result is something like an architectural film/ flythrough.
Thanks,
-Matt

Can't get display settings / destop tab back after removing it with GPO

I'm running ZEN32SP3. I'm just getting started with GPO in WinXP. I
inadvertently removed the desktop tab in the display settings and can't seem
to get it back. Can anyone help me out?
Thanks,
brad

Thanks.
"Rolf Lidvall" <[email protected]> wrote in message
news:AIVEc.1848$[email protected]..
> > I'm running ZEN32SP3. I'm just getting started with GPO in WinXP. I
> > inadvertently removed the desktop tab in the display settings and can't
> seem
> > to get it back. Can anyone help me out?
>
> The setting is here:
> User Configuration -> Administrative Templates
> -> Control Panel -> Display
> -> Hide Desktop tab
>
> The setting goes here:
>
> [HKEY_CURRENT_USER\Software\Microsoft\Windows
> \CurrentVersion\Policies\System]
> Value Name: NoDispBackgroundPage
> Data Type: REG_DWORD
> Value Data: 0 = disabled, 1 = enabled
>
> If you would like to start from square one
> on the WS, this TID explains how to clean:
> http://support.novell.com/cgi-bin/se...?/10059171.htm
> Follow 1-5, skip 6 (unnecessary)
>
> Regards
> Rolf Lidvall
> Swedish Radio (Ltd)
>
>

Display settings problem

I have a G4 Powerpc mac, 533 mhz, 256 MB of RAM. I was using Mac OS X Panther for the longest time and everything worked very well. I upgraded to Mac OS X Tiger and in the beginning everthing was fine, but now my moniter has gone crazy on me. I have a Hewlett Packard Pavilion PS 70 moniter, the problem is that the screen is very wide, height is okay, I have to use the horizantel button to move from one end of the screen to the other. After I installed Tiger everything was okay as well but I did that combo upgrade (10.4.6) and that is when the problem started. These are some of the things I have tried:
1. I have tried using display in System Preferences, to no avail.
2.fixing it using the horizental and vertical scrolls on the moniter.
3. zapping the pram
Should I buy a new moniter? Any help would be greatly appreciated. Thank you and God Bless You.

I do notice something interesting. The displays settings interface in tiger looks like the one in panther.the one in panther has resolutions, refresh rate, and colors, where as the one in the new admin account has the resolution and refresh rate in one box. Also I remember when I upgraded to Mac OS 10.4.6 using software update, during the update the computer froze and I had to reboot. When I tried to update again it just started downloading where it left off. I don't know maybe the operating systems got messed up. Just thought I would mention it though.

Display settings and 2nd monitor not working

Hi everyone, I have a tx2510 and Samsung 24 inch monitor. I have been using the Samsung as my monitor for months now with no issues. I went away with my laptop for a week and came back yesterday, hooked the analog monitor cable in, used it last night, eveything was fine, put it on hibernate and went to bed. This morning when I turned it back on, I got a floating Check Signal Cable box on the Samsung and no image at all on the notebook's screen. There is nothing wrong with the cable, connections were snug, it hadn't been touched since last night.
If I unplug the cable from the notebook, I do get an image pop back up on the notebook screen. So I went into Display Settings to see what was what and became more confused. The Samsung is listed as the #1 monitor, yet when I click the Identify Monitors box, the #1 shows on my notebook screen? And instead of 1920 by 1200, 1280 by 800 is shown as the max res. The "This is my main monitor" and "Extend the monitor onto this desktop" options are both grayed out.
#2 monitor is initially grayed but if I select it, it reads as "Default Monitor" with a max res of 800 by 600. Natural res for the tx2510 screen is 1280 by 800. If I select #2 and apply, it confirms, and then when I go back in to Display Settings, it's back to #1 (Samsung, even though the only image I can get is on the notebook's screen).
It's hard to troubleshoot this issue because as soon as I plug the monitor cable in, my notebook goes black and I have nothing to work with.
It's probably something simple but I really have no idea what to do next, drivers are current, I tried restarting, unplugged the battery, replugging the monitor cable. I need my 24" screen back!!! Any ideas appreciated...

Disconnect all the peripherals and the battery and press and hold the power button for 20 secs... start the notebook and connect the samsung monitor... press Fn+F4 keys to cycle the display.....
||-Although I am working on behalf of HP, I am speaking for myself and not for HP.-||
//Click on Kudos if my reply was helpful and answered your question//
||-If my answer solved the problem please mark the topic as the accepted solution-||

Unable to save display settings and Multiple Monitors

Have Windows 7 RTM installed on my laptop and was working great with extending to my monitor. I took my laptop home and hooked it up to my tv and it was fine. Now when I bring it back to work I cannot get the monitor to work. Only the display on the laptop is working. Windows can detect the monitor, but I try to enable the monitor and when I select Apply I get an error message "Unable to save display settings". I am a local administrator on the laptop. How can I extend to my monitor!
Thanks

Hi,
Error message " Unable to save display settings" mainly indicates that you try to extend or duplicate the desktop to the two external monitors in addition to the laptop screen. Generally, laptop supports only two displays at one time due to hardware limitation. I
suspect that the issue occurs because the laptop remembers both configuration for your extended monitor and TV. To extend your monitor, you need to clear the multiple configuration for your laptop and then extend your display by changing your display
settings. To do this, please take the following steps:
Step 1. Delete registry key.
==================
1)Press Win + R to open a run box.
2)In the Run box, type regedit, and then click OK.
3)Locate the following registry subkey:
HKEY_CURRENT_USER\Software\Microsoft\MobilePC\TMM
4)Right-click the subkey that you located in step 2. Then, click Delete.
5)When you are prompted to confirm the delete operation, click Yes.
6)On the File menu, click Exit to exit Registry Editor.
7)Log off the computer. Then, log on to the computer.
Step 2. Extend your display by changing display settings.
====================================
1)Open Screen Resolution by clicking the Start button , clicking Control Panel, and then, under Appearance and Personalization, clicking Adjust screen resolution.
2)Click the drop-down list next to Multiple displays, click Extend these displays, and then click OK.
References:
KB 973782
Best Regards
Dale Qiao
This registry key does not exist in my Laptop and it still won't work. I have an Asus N53S
which has both Intel HD Graphics 3000 and an NVidia GeForce GT 540M. It appears that the limitation is actually there is no D-Sub / HDMI / Internal Monitor option like there is in Windows Display.

Resettting display settings

I made the mistake of changing the display settings (refresh rate). I now have a system that flickers horizontally.
Per instructions from HELP I re-booted in Safe (shift during startup) but can't figure out how to reset things so they work properly.
Safe does return things to a normal display state, but any changes I make cause the horizontal flipping to recur.
How do I reset the display so the regular boot isn't all screwed up?
Tom

Just wanted to provide an update. I finally gave up and connected the mini's monitor to the regular monitor port on the Samsung and everything works fine.
I wonder if trying to connect the mini to the S-VHS port was the problem. As I posted, the content was a little blurry when I started out and the display setting change was when I started getting the problem.

G5 Freezes, display settings and videocard : A clue ?

Hello,
Before you begin to read this ( rather ) long post (sorry for that), i will summarize the final question :
Can there be a relationship between freezes and monitor settings in system preferences ? Are there solutions to improve these settings ? what can be done ?
*My experience* :
After last Tiger updates (9 and 10), my Finder (?) froze very often.
In April, for this reason, I made a Tiger "archive and install" installation.
Nothing really improved.
In July, after multiple freezes I uninstalled :
-ATI monitor utility,
-Optical Logitech mouse *LCC driver* (and come back to the cord original Apple mouse), and the
-APE folder "*Application Enhancer*" installed in System files, which I could not imagine to be there, since I had uninstalled "APE" from preference panes under Panther and +never reinstalled it+ after that. But EasyFind showed it to me and Pacifist indicated me that in the LCC driver package there was a "call" to APE installation (and in the last ATI monitor crash report I had seen this ape mentioned).
-dsl modem wifi card and come back to an ethernet connexion, and also
-reinstalled a *mac OS X 10.4.10 combo* update,
in spite of all these un-/installations, freezes were going on with a peak at 10 one day, leaving me convinced that something important in the G5 was totally dead.
One morning, on start, the screen was totally black and the monitor power green led was even off. (I checked warranty for the monitor : 3 years on site until ... November 2007, at least that could be saved.)
Before calling the shop where I had bought this *SyncMaster 213T* display, I wanted to be sure that nothing else was wrong. So, I did some test indicated on the Samsung paper manual (fortunately, there are still some...) i.e. : unplug the monitor from the computer and test it by itself ... I could see exactly the boxes that were indicated as "normal". So the monitor seemed to be "clean".
After I had uninstalled all other devices such as : USB 2 hub, Sony active speakers, and, on a friend's (knowing much more things than me on Macs) advice, made ( done ? sorry ! ) some vigourous PRAM reset I could restart with a "normal" screen.
The first thing I did, then, was to open the virtual monitor manual, in the trouble shooting session. Namely concerning compatibility between video cards and this monitor. There was something about frequencies unsupported by certain cards. I understood that the higher, the better. But to get the higher, I had to choose a lower Display resolution. In its native resolution (1600 x 1200), the Monitor pref pane proposed only 60 Hz; to get 75 Hz (the maximum frequency indicated in the pref pane) I had to downgrade the resolution from 1600 x 1200 to 1280 x 1024. So did I. After a last freeze, I restarted with PRAM reset. The screen was ok.
And several weeks after, in August, I realized that, since that time, I had encountered NO freeze at all. At that time, I was sure that the "vigorous" PRAM reset had made the wonder.
One day of August, I wanted to change my desktop image with a photo I had just taken. The photo size was wider than the display resolution and I could not see it entirely on the screen. So to get a total view of it, I changed the resolution size to the initial one (1600 x 1200 - freq. 60 Hz). And my photo was entire. Then, I wanted to read something in my newsreader ( Thoth , which I daily use). As a post window was too small to see the entire post and wishing to avoid scrolling, I dragged, as usual, the left lower side to resize this window and I saw the black border line figuring the new window ... but nothing else happened. The window did not resize and suddenly I realized that I was again in a freeze story. :-/
The Apple mouse cursor was moving freely but nothing else happened. And no click was efficient in the display view (but I could hear - as before - its reactive noise inside the G5).
I decided to wait a bit and dit it for about 20 minutes. Nothing went better and I had to shutdown and restart again, tried a "*fsck -s*" but there also, after a beginning of the process, monitor froze. Then, I decided to restart (with alt ) on a "safe" 2nd internal boot disk with a "clean installed" Tiger, which I keep for this kind of problems and from there repaired authorizations and checked the other disk (which appeared to be ok).
Then I restarted normally on my "working" session. Opened iTunes, but as soon as I wanted to click on Mail in the dock : re-freeze.
This time, when I restarted after shutdown (since the "force to quit" was unavailable), the first thing I did was to re-change the Monitor resolution and frequency (to 1280 x 1024 and 75 Hz). And from this time, mid-august, I had only one freeze, which occurred when I wanted to look at a genuine Apple screensaver (but for this, there are about two years that I had to abandon to look at them or at iTunes animations, that I miss ... snif) I just wanted to check if- now -with this display settings change, things were better, but no.
My display is a digital Samsung SyncMaster 213T (21") plugged on the DVI ATI card port.
Many thanks to those who have had the patience to read this and my apologize to those who have the feeling they have lost their time (and also for my approximative English).
*Thank you !*
PS : Since yesterday my SuperDrive, a Pioneer 106 D, (replaced one year ago by Applecare), seems to be definitely dead : a DVD appears like a text generic document in DiskUtility and does even not appear on the desktop although the DVD player opens, but on a "visualisation" window only (the name of the DVD, a video commercial one, which I could look at last week, did not appear in the window header but did in DiskUtility). And just before, another DVD made an horrible noise in the superdrive but nothing mounts on the desk, DVD player opened but I quickly removed the DVD because of the persistent noise (so I didn't open DiscUtility to see what happened). (Problems with this superdrive date from long).
Can there be a link between this last problem and others above ?
Message was edited by: Josy

Thomas Bryant wrote:
Hello! There are a couple of things you can do. One would be to run the Apple Hardware test to see if it comes back with anything. It's probably on one of the install discs if it's not on a separate disk. Second you can open the console (apps>utilities>console) and see if it's throwing a crash log that might help. The monitor and video card resolution could very well be causing the problem which would seem to indicate since a PRAM reset would clear the resolution settings. I think you'll have to find the resolution that works and stick with it. Tom
Hello!
For the AHT unfortunately impossible now with a dead Superdrive ... I had done it quite recently (one month) and all appeared to be ok. I'm thinking of buying an external one but don't know if it could help for this i.e: if an install DVD will run on an external drive.
for the console: I don't well understand your "throwing" a crash log ... Is it "deleting" that you mean? Then which one?
Just after writing this post, I read an interesting article by a developer about Tiger and resolution (an hidden feature) which I thought could be in relationship with my problem (I'm not a developer myself but to help localizing somme apps I had to install the DTools). Also saw in a forum a similar problem concerning a "younger" type of G5 monoproc 1.8, and an ATI RADEON card (younger too) and this resolution 1600 x 1200. It seems that several people (all gamers) with this configuration was meeting the same trouble. Sky punishment ??
Well I think I will stick to pram reset then.
Thank you very much for you answer (and your patience !)

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