Monitor screen flickering after login

Hi, i m using Yosemite and recently replace the entire font folder with previous OS fonts and encounter the problem with monitor screen blink on and off after login. Please help.

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Satellite C55-A5182 - Screen flickering after windows 10 upgrade.

Satellite C55-A5182: screen flickers after windows 10 upgrade....help!!!

Hi there , Thank you for visiting the HP Support Forums and Welcome! This is a great site to get answers and ask questions. I read your post on the HP Support Forums and I understand that you are having an issue with the Touchscreen on your HP Notebook - 15-ac020nr. You had mentioned that since your Windows 10 Upgrade, it no longer works. Have you tried doing all updates (Windows, HP Support Assistant, BIOS)?Have you tried restarting the Notebook a couple of times?Have you tried to run the Windows Troubleshooter? Here is a link to the HP Support Assistant. Just download and run the application and it will help with the software and drivers on your system that need updating for Windows 10. The HP Support Assistant will also help find a proper driver for you to use. Updated Windows 10 drivers will become available on the HP Drivers and Downloads Page for your product. They will be released as they become available to HP. I did find a troubleshooting document for you called Touch Screen Issues. Although it does say it is for Windows 8, it will still work for Windows 10. Please follow the provided troubleshooting steps and re-post with the results. Have a great day!

Screen flickering after 10.6.3 update

Hi,
Am using a Samsung 22" SyncMaster monitor with my 2009 Mac Mini connected via VGA with resolution 1680 x 1050 at 60Hz and after 10.6.3 update the screen flickers allowing me to see the desktop for around 1-2 seconds. Its really annoying but the only way to get rid of it is if i change the resolution to 1600 x 1000 also at 60 Hz but everything is blurry!
I checked the monitor manual and its recommended resolution is 1680 x 1050 at 60 Hz.
Does anyone else have this issue and is there a fix?!
Thank you.

Yes, I have the exact same problem.
I had this problem in 10.5.X as well. When I updated to Snow Leopard this went away. Now with 10.6.3 it is back again.
I worked around this problem in 10.5 by installing switchResX and playing around with the settings for the monitor... I haven't tried that in 10.6.3 yet.
I hope Apple fixes this soon. Being forced to use 3rd party software just to use the mac is unacceptable.

TV screen flickers after connecting to HDMI cable with DV6 laptop

When i connect my ps3 to samsung LCD tv it works completely fine.  But When i connect my hp laptop to same tv. The screen start's to fliker after 2-3 mins. Tried different refesh rate's and resolutions. didn't work for me . Also updated my display driver but still same problem.  Many suggested that HDMI cable might be the problem. But if cable is problem how is it working with ps3 connected to same tv.  Help. PLZ

HI , Welcome to the HP Forums!  It is a grand place to find answers and suggestions!
For you to have the best experience in the HP forum I would like to direct your attention to the HP Forums Guide. Learn How to Post and More How Do I Find My Model Number or Product Number?  I understand that when you connect your TV to your HP laptop via HDMI the TV screen flickers. If you connect the TV to your PS3 it does not. You have tried different refresh rates and resolutions but there was no change. Your notebook has HDMI version 1.4 supporting up to 1920 ×1200 @ 60Hz as stated in the maintenance and service guide. Please note chapter 1 page 9 under Ports. HP Pavilion dv6 Notebook PC Maintenance and Service Guide Have you ran the HP Support Assistant to try and obtain any HP updates? Have you done all your Windows updates? You can also manually check the HP Drivers & Downloads   page. You will need to input your exact model and follow the prompts to display your recommended software and drivers. Please note HP is doing some updates to their web site and you may need to try later to access the page. You could try a different HDMI cable just to rule that out.  To show appreciation for my replying please click the thumbs up button below. If this provided a solution please tell people by choosing solution provided.   Best of Luck!

Welcome Screen Just after Login

Dear Team,
I have one requirement where just after login to sap portal one image should be shown to all the user , Image is located in pdf format under
Content Managment----> Explorer and select Startup folder
When i am opening it is coming as
http://host:50000/irj/go/km/docs/documents/StartupPDF/Startup.pdf
That above PDF is having image , where to do configuration so that it can be shown to all user just after login to portal
Regards
RK

RK,
Are you referring to the splash screen (I was unable to view your PDF)?
If so, it can be configured in the theme editor:
Theme Editor > Outer Frame of Ajax Framework Page > Layout > Splash Screen
There are several properties that can be modified, but to change the splash screen image you will need to modify the following:
URL to Splash Screen Image
You may need to save the image to something other than PDF format and store it in KM or similar.
Hope this helps.
Trent

Screen flickers after boot camp 2.1 upgrade

I have been running boot camp 2.0 and WinXP for a few weeks on my iMac 24" 3.06 Ghz 4 Gb running 10.5.5. I had installed the nvidia 177.98 drivers and they improved gaming performance and work great.
I installed the boot camp 2.1 upgrade and the video drivers changed back to the boot camp 2.1 drivers. I re-installed the nvidia 177.98 drivers.
I now have two issues:
1. the monitor is listed as generic plug and play. Is there a driver for the iMac 24" display?
2. My room is dark so I use F1 to reduce the screen brightness. The whole screen flickers or flashes continuously. IF i have the brightness up near make the flickers or flashing stops. Anyone sen this or have any thoughts?
If i can't stop the flickering and flashing, I will eventually delete the WinXP system and re-create it and stick with boot camp 2.0.
..Bob

Before you re-do everything consider other options.
This is the procedure for uninstalling and installing drivers. A program called driver sweeper is required. To uninstall your old drivers you must boot into safe mode, uninstall your old drivers, use driver sweeper to eliminate any remaining fragments of your driver and then install new driver.
http://www.guru3d.com/category/driversweeper/
http://forums.guru3d.com/forumdisplay.php?f=29
Maybe you need to do 2.1 first? or use later drivers?
nVIDIA ForceWare X 179.13 for Windows XP/2K 32bit
http://www.laptopvideo2go.com/drivers/xp/179.13
In the future, you might want to use something to regularly backup, but for now, WinClone can take a full snapshot image for restore, and runs in OS X. DataBackupPC from Prosoft Engineering (Data Rescue II folks) or similar backup / cloning software (Acronis doesn't support GPT and EFI, so no Mac support).

IMac blank screen shortly after login - can't reinstall/restore either

Since yesterday my iMac crashes with a blank screen (different colors, mostly blue) shortly after login. Booting in safe mode is fine though. Hardware test did not find any problems, also Windows Vista 32bit runs fine. I would restore a recent backup, but when I boot from the installation disk the screen turns white and freezes. I tried a PRAM reset and I took the power chord and everything off for several minutes. Still the same issues.
Console showed kernel panics. Please check the dump below.
Any suggestions on how to restore my iMac?
Thanks,
qgi
Thu Sep 10 23:07:15 2009
panic(cpu 0 caller 0x00C866A4): NVRM[0]: Read Error 0x00020400: BAR0 0xe2000000 0x6a08c000 0x092480a2 D0 P2/4
Backtrace (CPU 0), Frame : Return Address (4 potential args on stack)
0x5b41f868 : 0x12b4c6 (0x45f91c 0x5b41f89c 0x13355c 0x0)
0x5b41f8b8 : 0xc866a4 (0xeb6e80 0xeb6e80 0xe7b6d4 0x0)
0x5b41f918 : 0xf3fdf0 (0x7868004 0x7ddd804 0x20400 0xcc2d06)
0x5b41f958 : 0xf6386f (0x7ddd804 0x20400 0x5b41f988 0x898)
0x5b41f978 : 0xd596da (0x7ddd804 0x46ebc098 0x0 0x5b41f99c)
0x5b41f9a8 : 0xd47c99 (0x7ddd804 0x46ebc004 0x1 0x5b41f9ec)
0x5b41fa08 : 0xde91f3 (0x7ddd804 0x7a1c604 0xa9af880 0x0)
0x5b41fab8 : 0xde881b (0x7ddd804 0x7e29004 0x0 0x0)
0x5b41fb38 : 0xf28bc1 (0x7ddd804 0x7e29004 0x1a 0x2)
0x5b41fbb8 : 0xf29254 (0x7ddd804 0x7e29c04 0x400000 0x5b41fcdc)
0x5b41fd38 : 0xf5a3ed (0x7ddd804 0x7e29c04 0x0 0x0)
0x5b41fe88 : 0xddc495 (0x7ddd804 0x7a1c604 0x0 0x0)
0x5b41fed8 : 0xc86b60 (0x7ddd804 0x7a1c604 0x0 0x0)
0x5b41ff18 : 0x426bfb (0x0 0x7ec4c80 0x1 0x19fed4)
0x5b41ff68 : 0x425d58 (0x7ec4c80 0x71066b0 0x5b41ff98 0x136efd)
0x5b41ff98 : 0x425a3a (0x7545840 0x7124ec0 0x72f04a8 0x0)
Backtrace continues...
Kernel loadable modules in backtrace (with dependencies):
com.apple.nvidia.nv50hal(5.4.8)@0xecc000->0x111ffff
dependency: com.apple.NVDAResman(5.4.8)@0xc6d000
com.apple.NVDAResman(5.4.8)@0xc6d000->0xecbfff
dependency: com.apple.iokit.IONDRVSupport(1.7.3)@0xc5f000
dependency: com.apple.iokit.IOPCIFamily(2.6)@0x629000
dependency: com.apple.iokit.IOGraphicsFamily(1.7.3)@0xc25000
BSD process name corresponding to current thread: kernel_task
Mac OS version:
9L31a
Kernel version:
Darwin Kernel Version 9.8.0: Wed Jul 15 16:55:01 PDT 2009; root:xnu-1228.15.4~1/RELEASE_I386
System model name: iMac8,1 (Mac-F227BEC8)
System uptime in nanoseconds: 166442601961
unloaded kexts:
com.apple.driver.InternalModemSupport 2.4.0 - last unloaded 118040925185
loaded kexts:
com.vmware.kext.vmnet 2.0.5
com.vmware.kext.vmioplug 2.0.5
com.vmware.kext.vmci 2.0.5
com.vmware.kext.vmx86 2.0.5
com.apple.filesystems.msdosfs 1.5.5 - last loaded 149337141464
com.apple.driver.iTunesPhoneDriver 1.0
com.apple.driver.AppleHWSensor 1.9d0
com.apple.driver.IOBluetoothSCOAudioDriver 2.1.8f2
com.apple.filesystems.autofs 2.0.2
com.apple.filesystems.ntfs 2.1
com.apple.driver.AppleUpstreamUserClient 2.7.5
com.apple.iokit.IOBluetoothSerialManager 2.1.8f2
com.apple.driver.AppleHDA 1.7.1a2
com.apple.DontSteal_Mac_OSX 6.0.3
com.apple.iokit.CHUDUtils 201
com.apple.iokit.CHUDProf 211
com.apple.driver.AppleIRController 113
com.apple.GeForce 5.4.8
com.apple.driver.ACPISMCPlatformPlugin 3.4.0a17
com.apple.driver.AppleHDAController 1.7.1a2
com.apple.iokit.IOFireWireIP 1.7.7
com.apple.driver.AudioIPCDriver 1.0.6
com.apple.driver.AppleUSBAudio 2.6.4b17
com.apple.driver.AppleLPC 1.3.1
com.apple.driver.AppleBacklight 1.6.0
com.apple.nvidia.nv50hal 5.4.8
com.apple.driver.BroadcomUSBBluetoothHCIController 2.1.8f2
com.apple.driver.AppleHIDKeyboard 1.0.9b4
com.apple.iokit.IOUSBMassStorageClass 2.0.8
com.apple.driver.AppleUSBMergeNub 3.4.6
com.apple.iokit.IOSCSIMultimediaCommandsDevice 2.1.1
com.apple.iokit.SCSITaskUserClient 2.1.1
com.apple.driver.XsanFilter 2.7.91
com.apple.iokit.IOATAPIProtocolTransport 1.5.3
com.apple.driver.AppleUSBHub 3.4.9
com.apple.iokit.IOUSBUserClient 3.4.9
com.apple.iokit.IOAHCIBlockStorage 1.2.2
com.apple.iokit.AppleYukon2 3.1.13b2
com.apple.driver.AirPortBrcm43xx 366.91.21
com.apple.driver.AppleFWOHCI 3.9.7
com.apple.driver.AppleAHCIPort 1.7.0
com.apple.driver.AppleIntelPIIXATA 2.0.1
com.apple.driver.AppleUSBEHCI 3.4.6
com.apple.driver.AppleUSBUHCI 3.3.5
com.apple.driver.AppleEFINVRAM 1.2.0
com.apple.driver.AppleRTC 1.2.3
com.apple.driver.AppleHPET 1.4
com.apple.driver.AppleACPIPCI 1.2.5
com.apple.driver.AppleACPIButtons 1.2.5
com.apple.driver.AppleSMBIOS 1.4
com.apple.driver.AppleACPIEC 1.2.5
com.apple.driver.AppleAPIC 1.4
com.apple.security.seatbelt 107.12
com.apple.nke.applicationfirewall 1.6.77
com.apple.security.TMSafetyNet 3
com.apple.driver.AppleIntelCPUPowerManagement 76.2.0
com.apple.driver.DiskImages 199
com.apple.BootCache 30.4
com.apple.iokit.IOSerialFamily 9.4
com.apple.driver.DspFuncLib 1.7.1a2
com.apple.iokit.CHUDKernLib 201
com.apple.driver.IOPlatformPluginFamily 3.4.0a17
com.apple.driver.AppleSMC 2.3.1d1
com.apple.iokit.IOHDAFamily 1.7.1a2
com.apple.iokit.IOAudioFamily 1.6.9fc5
com.apple.kext.OSvKernDSPLib 1.1
com.apple.NVDAResman 5.4.8
com.apple.iokit.IONDRVSupport 1.7.3
com.apple.iokit.IOGraphicsFamily 1.7.3
com.apple.driver.AppleUSBBluetoothHCIController 2.1.8f2
com.apple.iokit.IOBluetoothFamily 2.1.8f2
com.apple.iokit.IOUSBHIDDriver 3.4.6
com.apple.driver.AppleUSBComposite 3.2.0
com.apple.iokit.IOSCSIBlockCommandsDevice 2.1.1
com.apple.iokit.IOBDStorageFamily 1.5
com.apple.iokit.IODVDStorageFamily 1.5
com.apple.iokit.IOCDStorageFamily 1.5
com.apple.iokit.IOSCSIArchitectureModelFamily 2.1.1
com.apple.iokit.IO80211Family 216.1
com.apple.iokit.IONetworkingFamily 1.6.1
com.apple.iokit.IOFireWireFamily 3.4.9
com.apple.iokit.IOAHCIFamily 1.5.0
com.apple.iokit.IOATAFamily 2.0.1
com.apple.iokit.IOUSBFamily 3.4.9
com.apple.driver.AppleEFIRuntime 1.2.0
com.apple.iokit.IOSMBusFamily 1.1
com.apple.iokit.IOStorageFamily 1.5.6
com.apple.iokit.IOHIDFamily 1.5.5
com.apple.driver.AppleACPIPlatform 1.2.5
com.apple.iokit.IOACPIFamily 1.2.0
com.apple.iokit.IOPCIFamily 2.6
Message was edited by: qgi
Message was edited by: qgi

HI,
Go here for help to Resolve Kernel Panics
Carolyn

Both the screen flickering after dual monitor setup in Premiere Pro CS6

Hello,
I recently installed Premiere Pro CS6 in my PC. Then after I set up dual monitor in the Preference, the screens of both the monitor started to flicker until I stop the playback. Previously I used same hardware with CS5 but there were no problem.
Link to dxdiag text file :
https://dl.dropbox.com/u/53681371/DxDiag.txt
I have attached the screenshots of msinfo32 and my graphics drive info.

Some ideas for a Desktop Video Editing PC
http://www.adkvideoediting.com/
-ADK Kudos http://forums.adobe.com/thread/877201
Build http://forums.adobe.com/thread/878520?tstart=0
-more build ideas http://ppbm6.com/Planning.html
-Build it Yourself http://forums.adobe.com/thread/815798
-http://www.shawnlam.ca/2012/premiere-pro-cs6-video-editing-computer-build/
Laptop Video Editing PC http://forums.adobe.com/message/4578948

Why is my 2007 HP V17 monitor screen flickering and going black?

I have an old 2007 HP V17 monitor attached with a VGA cable to an early 2008 Macbook running on OS 10.6.8 software via a DVI- mini connector (this is also my desktop computer).
About 6 months ago, the HP display started going white and sometimes gray for a few seconds before the image would return, and a couple of times I had to unplug it and restart the Macbook before it came back. I followed Apple's instructions for testing whether the problem was in the computer (= resetting the system by resetting the Mac's parameter RAM and SMC), but the computer tested okay. I then purchased a new VGA cable and DVI-mini connector, but the problem persisted.
Today the HP screen suddenly went black (first time going black) and stayed black. The power button stayed lit and if I pressed the Volume or Auto buttons, the "Volume" etc. message boxes did appear, so the device's backlight is apparently working and not burnt out (unless the backlight has nothing to do with the message boxes showing up, which for all I know may be the case). However, the Desktop showed up only on the Macbook.
I checked all the connections, removed the DVI connector and plugged it back into the Macbook several times, but the HP screen stayed black, so I removed the DVI connector in order to type this message on the Macbook. Then, as I was writing this, I decided to plug it back into the Macbook one more time--and sure enough, the display is back!
I love this monitor, which is the perfect size and ergonomic height for my setup, so I'd hate to have to replace it. Can anyone tell me
Given the information above, what's the probable reason for the flickering and going to black? If it's the computer, what could it be? Can I solve this problem myself? (See above; I couldn't find any other ways to test the computer in the Apple articles database.)
If not, could a monitor this old be repaired?
If so, how much would repairing it cost, since buying a new monitor that I probably wouldn't like as much would cost upwards of $300?
Thanks so much for any advice out there!

Hello @turtlewiz,
Welcome to the HP Forums, I hope you enjoy your experience! To help you get the most out of the HP Forums I would like to direct your attention to the HP Forums Guide First Time Here? Learn How to Post and More.
I understand that your HP V17 Monitor has gone black and is not displaying anything. I am providing you with some steps for you to try below:
Step 1. Unplug the power cord from the back of the monitor and the wall
Step 2. Hold the power button down for at least one minute
Step 3. Plug the power cord back into the monitor and then into the wall outlet (not a power bar or surge protector)
Step 4. Press the Menu button on the monitor
Step 5. Navigate to the Factory Reset option and select it
If the issue persists after this you can try the monitor on another computer to see if it continues. If it does it appears to be a physical issue and I think it would be best if you contact HP Technical Support for repair options.
Please click the "Thumbs Up" on the bottom right of this post to say thank you if you appreciate the support I provide!
Also be sure to mark my post as “Accept as Solution" if you feel my post solved your issue, it will help others who face the same challenge find the same solution.
Dunidar
I work on behalf of HP
Find out a bit more about me by checking out my profile!
"Customers don’t expect you to be perfect. They do expect you to fix things when they go wrong." ~ Donald Porter

Monitor is flickering after upgrading to Mavericks

Hi eveyone,
As many of you already did, today I've upgraded my MacBook Pro i5 2.5 GHz/8GB RAM from Mountain Lion (10.8.5) to Mavericks (10.9).
Unfortunately, I'm experiencing serious and unpleasant issues since I installed the upgrade.
Specifically, my monitor flickers almost every time I scroll an application window (e.g., Safari) either using an USB mouse or the trackpad.
Moreover, when I pass the mouse over the Dock, this starts vibrating from time to time.
The same happens also to the external monitor I usually connect to my laptop via the MiniDisplay to VGA cable. The external monitor is an LCD Samsung SyncMaster B1940MR.
After several reboots and given that one of the new features of Mavericks is the new management of external monitors, I've tried to re-install from scratch the OS X upgrade without connecting my laptop to the external LCD but still nothing has changed.
I'm really annoyed by having both monitors flickering. Another particular thing is that if I try to click on the Finder menu appearing on the external monitor, this makes flicker the primary monitor approximately at the same coordinates (i.e., at the Finder menu of the laptop monitor).
It seems like something is going wrong with the video card drivers but this is just my conjecture.
Are you guys experiencing the same or is there anything you might want to suggest to solve these issues?
Thank you in advance

Iv upgraded to maverick and not at all happy... first off my thunderbolt does not work any more....
And now the apple monitor im using with my laptop (macbook pro I7 2.2ghz / 8gb ram / AMD Radeon HD 6750M 512 MB) via mini dvi flash's to a black screen every now and then...
Im not sure about the monitor flickers you guys are getting? Im literally getting the monitor display a black screen as if the apple screen is switching off and on again because of loss of signal?
Really anoying when trying to right code and design!
APPLE FIX THIS PLEASE! before i download adobe suite for my windows 8 partition!! and yes i just said that! >_<

Desktop screen flickers after updating my nvidia GTX 680m driver on my MSI GT70!

Hello, MSI!
Yesterday, I updated my MSI GT70 Dragon Edition's nvidia driver to the one suggested on my laptop'smsi page. Previously, It was running on the latest driver downloaded from nvidia itself (314.22) with no problems whatsoever. But I thought I'd give the msi's official driver a try, to see if it was better. The whole day, the laptop worked fine, even after restart, but after starting it and logging in today, the desktop screen was black and flickering. There was an Flickering error window that can't be read but the title that says ".net framework 4 error"!
Now I've googled the problem, and I might have found the solution, but I need to boot it to safe mode first, and I'm not able to. So if you, please, could tell me how to boot my GT70 to safe mode. Note that I'm not able to reach the "Run" window since the screen is black, and the laptop keeps restarting.
Awaiting you immediate response.
Thanks in advance.

Hello, flobelix!
Thanks for your instant reply.. and I'm sorry that I could not immediately reply as I lost the forum URL
Anyways, I solved the problem!!
I knew that the problem was caused by the driver update, so I decided to connect an external LCD monitor, and the desktop screen showed right away on it. I was curious, so I disconnected that external LCD monitor to see if the laptop's screen went back to normal, and it DID!!! Anyhow, I immediately reconnected the LCD monitor to completely delete the corrupted driver (v314.22) and reinstalled the same driver again...
And by the way, the suggested way of approaching the safe mode when the PC is not normally functioning did not work, whatsoever! I sat for at least two consecutive hours trying it.. in vein!
Again, thanks a lot.

Screen flickering after iOS 6.1 update and some apps crashing frequently on my iPhone 4 .. I didn't have this in 6.0.1 back when people complained about it

hello, I had no keyboard flickering issues back when my iPhone 4 was on iOS 6.0.1 then I updated to 6.1 yesterday and now I have apps crashing frequently and keyboard flickering? anyone else having the same issue after the update? any known solution?

I'm having the same issue on my iPhone 4 since yesterday when I updated to iOS 6.1 from 5.1.1.
After about an hour after the upgrade, it crashed/rebooted itself and went completely white/grey screen with a brighter white line in the middle. My power/sleep button was broke already, so I couldn't do anything on it. I left it to drain the battery for about 6 hours. During that time, the edges around the white/grey screen became darker and darker like burn-in effect. After it ran out of the battery, I connected the phone to the PC through USB and iTunes let me restore it to iOS 6.1 firmware I downloaded before.
The restore was successful, but the entire screen keeps flickering rapidly, not just a part of the screen.
Is it hardware or software related issue?? Any idea?

Screen flickering after restoring

I've found the problem that annoys so much...
I've decided to restore my 5S due to some bugs. I've restored it from DFU mode to iOS 7.1.2 and noticed that screen edges are flickering. After 5 or 6 restores flickering decreased but still flickers a little bit. It doesn't seem to a hardware problem but I don't know how to fix it...
Any ideas???

Hello yatsechko,
Thanks for using Apple Support Communities.
If you have restored your iPhone to factory settings and the issue persists, then you need to look into getting your iPhone serviced.
Repair & Service
http://www.apple.com/support/iphone/repair/
Take care,
Alex H.

Screen freezes after login on Lion OS X (intermittent)

Ever since upgrading my MacBook Pro (purchased Apr-10) from Leopard to Lion I'm experiencing an intermittent problem where the screen freezes once a user has logged in. The problem only occurs when the machine is started from off and doesn't occur when starting from sleep or when switching users.
This problem affects all users set up on this machine and results in a cursor that can still be moved but can't select anything and a keyboard that is unresponsive. Most times the cursor shows as the coloured wheel. I have left the machine in this state for over 30 minutes to see if it would recover but it doesn't and I have no option other than to perform a hard reset by holding down the power button. Sometimes it can take a couple of hard resets before the machine recovers.
The configuration of my machine is fairly straight forward with an Apple Time Capsule providing backup and WiFi and minimal software installed.
I have found that disabling all 'Open At Login' apps reduces the likelihood of the problem but doesn't cure it.
Has anyone else experienced this problem and can provide a solution as I want to avoid having to revert to Leopard if possible.

Accelerated Video Drivers for the 5770 and 5870 first appeared in 10.6.5, so when running 10.6, be sure to update to at least that version before drawing conclusions.
Otherwise, I think your conclusions that this is a graphics card problem are likely correct. Over a very large sample, these cards have been much more reliable than many previous cards. But you do not have a very large sample, you have one card.
The Mac Pro (65lb tower) uses Error Correcting Code memory, so this is NOT a RAM memory problem or you would be getting kernel panics with machine check, uncorrected error.
Apple hardware test is a tool that only seems to detect the grossest of errors. It is famous for false negatives.

XP locks screen right after login?

We're running VDI 3.0 with XP SP3 clients. For some reason, after users do the initial Windows authentication (right after boot), the system logs in and locks the screen almost immediately... I can't figure out for the life of me what would cause this. Ideas?

System Preferenes > Sound > Output > Internal Speakers
Make sure that Mute is not enabled.
Reset SMC. http://support.apple.com/kb/HT3964
Choose the method for:
"Resetting SMC on portables with a battery you should not remove on your own".
If you see red light in the headphone port, plug the headphone
in and out of the port 5 or 6 times to flip the microswitch inside.
Sound output may be stuck in the digital mode.
Best.

Monitor screen flickering after login

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