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8 Posts

16846

April 15th, 2005 18:00

Distorted screen image

My 600m has a Mobility Radeon 9000.

My desktop often becomes littered with ghost images of windows I was just working in and even the icons on the desktop.
In this picture you can see my wallpaper has been contorted and you can see a ghost of mspaint (I was using it to take a screen shot of this mess).
distortion

It seems as if the cache is getting messed up some how. Even weirder--the problem, though less intense, still occurs via remote desktop.

I have reinstalled the driver but it hasn't helped anything. Suggestions would be much appreciated.

75 Posts

April 15th, 2005 19:00

try reseating the LCD cable,its underneath the keyboard.
 
if you experience the same thing,then connect an external monitor.
if you have the same problem,probably your video card has gone bad!

8 Posts

April 15th, 2005 21:00

Rebooting temporarily fixes it so I do not think the cable is loose. Also it affects the desktop mostly while applications don't suffer often. It seems to me like a driver/firmware issue.

75 Posts

April 15th, 2005 22:00

try flashing the BIOS,
 
then uninstall and reinstall the video driver in safe mode after.

8 Posts

April 16th, 2005 14:00

If I unistall the driver, will the screen work at all before I can reinstall it?

I discovered that changing to 16-bit color depth significantly reduces the problem. I also found that it does not occur in safe mode. I have the 32 MB Mobility Radeon 9000-- I wonder if it is running out of memory and reusing memory that's already in use due to a driver problem.

8 Posts

April 18th, 2005 09:00

Just as a test, try turning off hardware acceleration in the advanced section of the display properties. Also, try turning off "write combining" in the same section.

8 Posts

April 19th, 2005 12:00

Reducing hardware acceleration eliminates the problem. However, I can tell a noticable difference in performance. Should I contact dell to get the video card repaired?

8 Posts

April 19th, 2005 19:00

Have you tried setting the hardware accel. at full, and only turning off "write combining"? I read somewhere that the radeon 9000 had some problems with that setting (I could be wrong though).
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