Dual display bug

seems to be a bug in the display preferences. if i use dual monitors, it does not extend desktop like it used to. you can only mirror the two displays

Since I've updated to Snow Leopard I have problem to use dual screens.
When I boot the secondary screen stay blank. Sometimes the image appears but for a very short moment and then just disappears.
The only way I found to use dual screen is to enable mirroring and disable it. I have to do it after every reboot...

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10.5.1 and dual display bug

I have been using my MacBook Core Duo (graphics card GMA 950) connected to a projector in dual display mode for over a year. After upgrading from 10.5 to 10.5.1, the macbook can function in mirror mode, but the projector does not receive a signal for dual display unless I restart the computer. The problem is consistent even though the projector has not changed.
Normally I plug in and the laptop screen changes to blue, then changes to dual display mode and sends a signal to the projector. Now, when I connect to the projector, the projector signal is black. I can switch to mirror mode using either F7 or via the Display preferences but there is no way to obtain dual display mode. Once I reboot, the problem is solved. This has been going on daily, each time with the same solution.

I get dozens of the "ACL found but not expected ..." messages, all on the contents of System/Library/User Templates/. When I go to System/Library/ in Finder, only the User Templates folder has a red icon on it, indicating that I do not have access to it (when logged in as an admin). The icon does not appear on any of the other folders in System/Library. Does anyone have any idea on what's going on?
Message was edited by: Rob J.

Dual display color and other related issues...

I have posted this on painter forums, though some of the issues coming together here are directly related to issues w/ Snow Leopard and dual displays. Thought I would try here....
This is so bizarre. When I ever I run P11(I think this is going on in P10 too?) w/ the OS X (snow leopard, 10.6.2 on quad core Intel Xeon Mac Pro, 10 GB of RAM) menu bar on my Eizo(making it the main display), and the Apple Cinema display left as the #2 monitor, I get very annoying brush cursor artifcats left randomly on the Eizo screen after strokes. One cannot predict when the cursor will leave it's gray "marks", but it will do it, sometimes 5 strokes in a row, sometimes after 15 strokes or so? If I move my brush back over them, or change the image percantage view, they vanish, obviously new ones coming back, as I work.
However I put the OS menu bar on the AC display, yet work back on the Eizo, this does NOT happen. No cursor artifacts. Well, at least I can summon the issue
The reason I am doing this is Snow Leopard has bad color issues w/ dual displays (well documented, much to Photoshop CS4 users frustrations, and mine). Apple needs to fix it... but for me to see the right color on the Eizo(this is my main color and superior display), it needs to be the main monitor(menu bar) in 10.6.2.
So, you can see my trap - Accurate color, or annoying cursor artifacts left on the screen (sorry, it really bugs me as I work) as I work in Painter.
Attempted fixes: Trashed all of Painter's prefs, all of Wacom's Intuos 4(latest driver) prefs and software, switched plug ins on the back of the mac for the displays(lots of restarts), ran cache cleaning Cocktail and DiskWarrior, etc. -- no change, as I can duplicate the issue w/ the above set up. A sidebar or maybe be very related note: I have an iMac w/ max amount of ram (model not very old -- maybe 1 or 2 old) and I have had a long standing issue working on the iMacs we have had w/ this brush cursor artifact problem (in Leopard and Snow Leopard). I am on one monitor w/ the iMac, so you know here the menu bar is...hmmmmmmmm.....?
Thanks!, T

I have posted this on painter forums, though some of the issues coming together here are directly related to issues w/ Snow Leopard and dual displays. Thought I would try here....
This is so bizarre. When I ever I run P11(I think this is going on in P10 too?) w/ the OS X (snow leopard, 10.6.2 on quad core Intel Xeon Mac Pro, 10 GB of RAM) menu bar on my Eizo(making it the main display), and the Apple Cinema display left as the #2 monitor, I get very annoying brush cursor artifcats left randomly on the Eizo screen after strokes. One cannot predict when the cursor will leave it's gray "marks", but it will do it, sometimes 5 strokes in a row, sometimes after 15 strokes or so? If I move my brush back over them, or change the image percantage view, they vanish, obviously new ones coming back, as I work.
However I put the OS menu bar on the AC display, yet work back on the Eizo, this does NOT happen. No cursor artifacts. Well, at least I can summon the issue
The reason I am doing this is Snow Leopard has bad color issues w/ dual displays (well documented, much to Photoshop CS4 users frustrations, and mine). Apple needs to fix it... but for me to see the right color on the Eizo(this is my main color and superior display), it needs to be the main monitor(menu bar) in 10.6.2.
So, you can see my trap - Accurate color, or annoying cursor artifacts left on the screen (sorry, it really bugs me as I work) as I work in Painter.
Attempted fixes: Trashed all of Painter's prefs, all of Wacom's Intuos 4(latest driver) prefs and software, switched plug ins on the back of the mac for the displays(lots of restarts), ran cache cleaning Cocktail and DiskWarrior, etc. -- no change, as I can duplicate the issue w/ the above set up. A sidebar or maybe be very related note: I have an iMac w/ max amount of ram (model not very old -- maybe 1 or 2 old) and I have had a long standing issue working on the iMacs we have had w/ this brush cursor artifact problem (in Leopard and Snow Leopard). I am on one monitor w/ the iMac, so you know here the menu bar is...hmmmmmmmm.....?
Thanks!, T

Colour management warning for dual display users

For those of you who require a colour managed workflow and have more than one display, be very careful in Mountain Lion. It appears to have a bizarre bug where images loaded and shown on the primary display (e.g. in Preview) are initially rendered with the colour profile from the secondary display, or something along those lines. Dragging the display window to the secondary display and back again sorts things out. I've filed a bug report.
If your two (or more) monitors have the same colour profile, you won't have a problem. The only workaround I can see is to set your least important display(s) to all have the same profile as your (probably calibrated, if these things matter to you) primary display, at least until (if?) the bug gets fixed.
If you want to see it for yourself, set your two displays to differing profiles - e.g. NTSC (1953) on the primary and Wide Gamut RGB on the secondary. Then load an image into Preview - something with lots of shades of red "works" well for the colour profiles mentioned. Take a screenshot of the Preview window as a reference. Move the window to the secondary display; note the colour shift as it gets re-rendered. Now drag it back to the primary display. It'll look quite different compared to the screenshot you took earlier, despite the fact it's the same image being shown by the same application on the same display in the same window... All you did was drag the window between two monitors and back again.
It doesn't seem to matter if the image in question has a colour profile embedded in it or not. When comparing with your screenshot, feel free to drag the screenshot between the monitors too - after all, it'll be suffering the same rendering bug! You'll still see a different result; in fact it may even be magnified by the accumulated rendering errors.
Preview isn't the only application affected; I've seen identical issues under harder to replicate circumstances in Safari, for example.
Given this fault and others I've seen with colour rendering in Lion, plus several new bugs found in Mountain Lion, I'm afraid that if a colour managed workflow is important to you - well - Snow Leopard or Windows...?! Ugh, what a mess

I've encountered many of the same woes with color management being a graphic designer, but here's my issue:
Have a 15" (Early 2011) Macbook Pro. It is turned on with me hooked up to my Dell U2410 and display open for a dual display configuration. The Dell is my primary monitor.
I then unplug my MBP to use it around the house. I go to plug it back into the Dell for my dual monitor. I notice that the color on the Dell looks good, but now the MBP has a very blue color temperature. Like moving from the preconfigured 'Color LCD' profile to 'sRGB' which definitely shifts to a blue color on the MBP.
I check the color profiles in System Settings and the Color profiles are correct. 'Dell U2410' for my Dell and 'Color LCD' for my MBP. But as I said, it's much bluer than standard. I try to change the color profiles around on the MBP and no matter which I select it's always the same color with no shifts I would expect to see.
Only solution I have found is to restart my computer. Upon restarting all is well again in the world.
It's pretty annoying having to restart my computer everytime I plug it back into my workstation with Dell and keyboard.
Related note: USB does not work when I plug things back and again have to restart to fix this.

Logic "Scroll in Play" Display Bug

Logic is exhibiting a mild yet very annoying display bug. I first reported it on Jan. 12, 2010 here:
http://discussions.apple.com/message.jspa?messageID=10892868#10892868
I am still plagued by this problem on my 8-core, 3GHz Mac Pro. I was about to purchase a new video card hoping that would cure it. Now, however, after trying it on a different Mac (dual core iMac), I was able to reproduce the problem. It's a Logic bug; not a problem with my hardware.
The problem, specifically, occurs when "Scroll in Play" is enabled and a multi-track tune is played (I'm using all MIDI tracks). Every so often (perhaps every 10 bars), some artifacts appear on the display. They appear to be image fragments that were somehow improperly reproduced. Below is an example.
Note that part of the bar number is improperly reproduced. Now, I have seen this bug on both a Mac Pro and a dual-core iMac. I certainly would like to see this problem fixed.

Pete_in_Denver wrote:
Erik -
I have noticed this most while tracking/recording (and not editing) - is there a way around that? Frankly, it FEELS like a bug - I turn it on, it turns itself off again - REPEAT.
Thaks for the response by the way!
You're welcome, Pete.
What I meant is: the turning-off-when-editing is by design, the turning-off-when-touching-nothing is a bug, and the only thing that works for me is to zoom out the affected window a little.

Dual Display Problem with new MacBook Pro

Hi All,
I just got a new MacBook Pro Core 2 Duo and a 30" Dell LCD Monitor. Both are AWESOME products, BTW. But I am having a weird issue with running both displays.
If I sleep/wake the computer so that I'm never running with dual displays, everything seems fine. However, no matter what I try, I eventually get a system hang if both displays are active at once.
For example, if I turn the MBP off, attach the monitor, and power up, the MBP will get to the login screen. As soon as it hits the logon screen, it hangs.
If I hot-plug the monitor while the system is running, it will detect the new display and activate it as a secondary desktop. But, in anywhere from 5 seconds to 15 minutes (varies each time) the MBP display will turn off and the system hangs.
To me, it seems like a video driver bug or something similar to that?
Thanks!

To those of you that inquired, NO, I have not yet resolved this problem.
I took the laptop into the Apple store, and they decided that it needed a new logic board. Then, once they received the part, and I took the laptop in for repair, they didn't replace the logic board. The guy on the bench reset the PRAM and decided that the problem was resolved. I took it home, and within about 20 minutes the same thing happened.
When I took it back to the store, I was unable to reproduce the problem for the mac Genius.
It still does it, I I just haven't had a chance to take it back to the store to try to reproduce the problem again.

Wacom tablet on dual display dual card setup...

...and the cards are as follows, one Geforce GTX 460 (nvidia driver), one Radeon x1650 (radeon driver) As such, I have to use Xinerama and not RandR for my dual display setup. I have configured the driver to use my main display (Dell CRT on GTX 460) and the cursor shows up where it's supposed to, but when I draw, the cursor "splits" into two, the actual cursor, and the drawing cursor. The regular cursor moves as if it's on my main display, but the drawing cursor spans both desktops.
I've tried all kinds of things to make it work, no luck though.
xsetwacom set "Wacom Graphire4 6x8 stylus" Area 0 0 30408 12064
xsetwacom get "Wacom Graphire4 6x8 stylus" MapToOutput HEAD-0
Both of those commands produce the same result, which is shown in the video below.
xorg.conf
http://pastebin.com/d0TSwNrR
And a lovely video showing what I mean.
http://www.youtube.com/watch?v=YMGGehD81jM
Any help would be lovely.

MisterAnderson wrote:Honestly no clue how to help you, but I am interested in your setup. Are you using the proprietary drivers for your nvidia card and the opensource radeon for your ati? How did you get this setup working? I've been trying for ages!
If I remember correctly, I just used --nodeps and maybe --force when installing the nvidia driver, that way it didn't force me to uninstall the radeon driver when I install the nvidia driver. Then, look at my xorg.conf. there's no acceleration of any sort on the ati card, but I can use it for terminals and browser windows, text editors and the like. Can't watch flash videos on it though, and I don't think mplayer works on it either, I'm not at my arch box atm, so I can't verify that.
Also, as mentioned in my opening post, no composting either. The same setup works pretty good in Ubuntu with a similar config, but no compositing there either, Unity clones 1680x1050 of my main 2048x1536 display, can't split the desktops, and I just end up using Xfce4 because it handles Xinerma pretty well.. I have to turn off the compositing extension in the config on arch to get X to even start up.
:edit:
back in arch, should note that whenever I install a new package, I receive this warning. Everything still works tghough as I describes. And back on topic, anyone have any clue as to why my tablet behaves this way?
missing dependency for ati-dri : libgl=8.0.4
Last edited by RexMcLess (2012-10-02 19:58:03)

Highest dual display resolution for mac mini mid 2011

I am currently running a mac mini mid 2011. As I've understood (according to the below statement). Am I only able to use 2 secreen with 1920x1200 or could I use one screen with 2560x1600 and one with 1920x1200. I do NOT want mirroring, only dual displays.
I am going to connect the screens in the following way:
1x mini-dvi - HDMI to one screen.
1x HDMI - HDMI to the other screen.
Display Support:
Dual Displays
Resolution Support:
1920x1200*
Details:
*This model simultaneously supports 1920x1200 on an HDMI display or a DVI display using the included HDMI-to-DVI adapterand 2560x1600 on a Thunderbolt or Mini DisplayPort display or even a VGA display (with an optional Mini DisplayPort-to-VGA adapter, which is compatible with the Thunderbolt port).
2nd Display Support:
Dual/Mirroring*
2nd Max. Resolution:
2560x1600*
Details:
*This model simultaneously supports 1920x1200 on an HDMI or a DVI display (using the included HDMI-to-DVI adapter) and2560x1600 on a Thunderbolt or Mini DisplayPort display or even a VGA display (with an optional Mini DisplayPort-to-VGA adapter, which is compatible with the Thunderbolt port).
Thanks in advance
Rich

According to the copy&paste from wikipedia, HDMI should support higher resolution than 1920x1200. So the question is, does it aupport that on the mid 2011 mac mini. It says in the specifications
"Mac mini is designed to work with HDMI devices that comply with versions 1.0, 1.1, 1.2, 1.2a, 1.3, 1.3a, and 1.4 of the HDMI specification."
That should mean it should be able to support it, but I don't know : <
HDMI version
1.0
1.1
1.2
1.3
1.4
2.0
Date initially released
December 9, 2002
May 20, 2004
August 8, 2005
June 22, 2006
May 28, 2009
September 12, 2013
Maximum clock rate (MHz)
165
165
165
340
340[109]
600
Maximum TMDS throughput per channel (Gbit/s) including 8b/10b overhead
1.65
1.65
1.65
3.40
3.40
6
Maximum total TMDS throughput (Gbit/s) including 8b/10b overhead
4.95
4.95
4.95
10.2
10.2
18
Maximum throughput (Gbit/s) with 8b/10b overhead removed
3.96
3.96
3.96
8.16
8.16
14.4
Maximum audio throughput (Mbit/s)
36.86
36.86
36.86
36.86
36.86
Maximum color depth (bit/px)
24
24
24
48[a]
48
Maximum resolution over single link at 24-bit/px[b]
1920×1200p60
1920×1200p60
1920×1200p60
2560×1600p75
4096×2160p24
4096×2160p60
Maximum resolution over single link at 30-bit/px[c]
N/A
N/A
N/A
2560×1600p60
4096×2160p24
Maximum resolution over single link at 36-bit/px[d]
N/A
N/A
N/A
1920×1200p75
4096×2160p24
Maximum resolution over single link at 48-bit/px[e]
N/A
N/A
N/A
1920×1200p60
1920×1200p60
Maximum 3D resolution (using a full resolution 3D format) over single link at 24-bit/px
N/A
N/A
N/A
N/A
1920×1200p60

Photoshop CS4 Menu toolbar display bug and fullscreen slowness...

http://img384.imageshack.us/img384/8202/menutoolsbugee3.gif
I'm having a display bug with the menu toolbar in Photoshop CS4 Extended. Notice the area of tools is gone and replaced by random pixels? This happens whenever I enter the fullscreen mode that hides the interface. And when I exit that fullscreen mode, that bug appears and doesn't fix itself until I restart Photoshop. Can this be fixed?
Image view rotation also happens much slower than normal in that fullscreen mode when interface is hidden. But performs normally after I bring back the interface.
I'm on WinXP, Athlon 64 4000+, 3GB ram, GeForce 6800 GT video card [driver 169.21]. I'm not sure if this is a video driver bug or CS4 bug.

Yeah, Dave, I can understand how that can happen. I've seen that sort of weirdness when I've seriously overtaxed my hardware.
 
 Had way too much running all at once yesterday, switched over to Firefox, and clicking on folders in the Bookmarks bar, I had 4 bookmark/folder menus dropped simultaneously.
 
 I managed to grab a screenshot with 2 of them showing, but man! You shoulda seen it with 4!
 
 I ESC'ed out, quit GarageBand (had a song project of several hundred MB going) and all was fixed.
 
 
<a href="http://www.pixentral.com/show.php?picture=1oV3eLGID1UYwZ4L5Y0n44ThA0Ab0" /></a>
<img alt="Picture hosted by Pixentral" src="http://www.pixentral.com/hosted/1oV3eLGID1UYwZ4L5Y0n44ThA0Ab0_thumb.png" border="0" />

How do I use dual displays to have a full screen app on one monitor and another full screen app or the desktop on the other?

How do I use dual displays to have a full screen app on one monitor and another full screen app or the desktop on the other?
I want to have my itunes visualizer on my TV which is connected via HDMI adapter, and still have access to full screen itunes and my desktop on the main display.
Any suggestions? App downloads that can do this? Please let me know.

You can't do it. This has been an issue since Lion.

Minor display bug in JDev 11g "View Annotation" with Subversion

Hi all,
A very minor visual display issue with the "View Annotations" feature of JDev 11g when using a Subversion repository. To reproduce, simply follow these steps:
1). Open up any source file and right-click in the editor; select Versioning -> View Annotation. The annotations will be shown, and if you right-click again, you will see a check-mark next to the "View Annotation" menu item.
2). Open another source file. Annotations are not shown. Right-click in the editor; you will see that "View Annotation" menu item displays a check-mark (even though annotations are not shown). Select Versioning -> View Annotation. Annotations are now shown, but you will see the check-mark is no longer displayed.
To summarize my analysis; it appears that "View Annotation" was intended to be a global setting (as indicated by the check-mark), but is actually implemented on a file-by-file basis. Obviously a very minor display bug not affecting functionality, but a bug nonetheless.
John

John,
I filed a bug
thanks
Frank

Possible to do dual display with a mini?

I have an early 2008 Mac mini (Intel) - with the standard DVI connector; using the supplied DVI/VGA adapter to connect to an LCD monitor.
I'm just wondering if it is possible to use two displays with this model and if so, how do I connect the second monitor?

Several ways of doing it in this thread:
http://discussions.apple.com/thread.jspa?messageID=8335705&#8335705
If you want to go the usb route, see also:
http://eshop.macsales.com/item/Other%20World%20Computing/VIDU2DVIA/
Be sure to examine the limitations of each method.
(I'd also consider that your 2008 Mini likely has substantial resale value and that you might prefer getting a 2009 Mini which natively supports dual displays.)

Mac Mini (mid-2011) dual display with extended desktop

Can Mac Mini (mid-2011) dual display different picture on HDMI TV and DVI monitor. I can only get it to mirror and not display different programs or extended desktop. Can i "extend" instead of "mirror"? and how

Hi David it should...
Display Support:
Dual Displays
Resolution Support:
1920x1200*
Details:
*This model simultaneously supports 1920x1200 on an HDMI display or a DVI display using the included HDMI-to-DVI adapter and 2560x1600 on a Thunderbolt or Mini DisplayPort display or even a VGA display (with an optional Mini DisplayPort-to-VGA adapter, which is compatible with the Thunderbolt port).
2nd Display Support:
Dual/Mirroring*
2nd Max. Resolution:
2560x1600*
Details:
*This model simultaneously supports 1920x1200 on an HDMI or a DVI display (using the included HDMI-to-DVI adapter) and 2560x1600 on a Thunderbolt or Mini DisplayPort display or even a VGA display (with an optional Mini DisplayPort-to-VGA adapter, which is compatible with the Thunderbolt port).
Are you using splitter maybe?

Dual Display on Mac Mini

Hi there,
I want to have a dual display setup with my Mac Mini. There's also a twist. One of the displays is a regular monitor. The other display is a 46" TV. I am not too technically minded - is there a splitter or some kind of dual display "kit" I can pick up?
Thanks!

Which Mac mini? The new one has two video outputs on it, so two displays is not a problem.

Dual Displays and Windows XP

Hello,
I have a MBP with the Radeon X1600 graphics card. Under OS X I can run dual displays without a problem, either extended or mirrored. Using Bootcamp to boot to Win XP, I can only get the 2nd monitor to run extended, I can't get it to run mirrored. What really drives me nuts (short trip) is that I have run it in mirrored mode before when I teach. I go to the Display dialog box and "see" both monitors, but the only way I can get anything now on the 2nd is to run extended? I could update Radeon driver on the Windows side, but I thought BootCamp took care of that and I don't want to mess up my laptop?

It is definitely best to reinstall anytime you make a major system change. You will have to do at least a windows repair although I am not sure if it will fully enable the dual core.
Good Luck
Jeremy

Dual display bug

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