[Bug 21553] snow and flashy lines on rs690

[bugzilla-daemon at freedesktop.org]

http://bugs.freedesktop.org/show_bug.cgi?id=21553


etbsb1 at gmail.com changed:

           What    |Removed                     |Added
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                 CC|                            |etbsb1 at gmail.com




--- Comment #17 from etbsb1 at gmail.com  2009-05-31 14:32:45 PST ---
I have experienced a similar problem on my Dell 5100. For me it seems to have
worsened considerably with new kernel versions.

I started running Ubuntu Intrepid on a Dell 5100 laptop at the beginning of
March (2009). I don't recall any display problems for the first few weeks. Then
a few weeks ago I noticed occasional pixel artifacts and odd horizontal lines.
It worsened, and a few days ago became intolerable. 

For me the severity seems to depend upon the Linux kernel version. When running
2.6.27-14-generic I get prolonged colorful snowstorms, green and blue
blizzards, that last anywhere from seconds to minutes, recurring at intervals
from one minute to maybe fifteen minutes. My display becomes pretty much
incomprehensible and useless.

Running 2.6.27-11-generic (the previous kernel automatically downloaded by my
system update) is somewhat better, but still frustrating. The blizzards are
less frequent, but I do see many artifacts and lines.

I've gone back to 2.6.27-7-generic for now. With that kernel I get zero
snowstorms (that I recall) and just a few pixel artifacts similar to the
snapshots Aron posted.

I can also still boot Windows XP. No displays problems occur then, so it
doesn't appear to be failing hardware.

Other technical details:

Here's the panel ID from Xorg.0.log:
(II) RADEON(0): Panel ID string: IBM J1838 ITSX95

Chipset: "ATI Radeon Mobility M7 LW (AGP)" (ChipID = 0x4c57)

This is a Dell 5100, about six years old. Native panel resolution is 1400x1050.

Radeon drivers loading:
(II) Matched radeon from file name radeon.ids
(==) Matched radeon for the autoconfigured driver
(II) LoadModule: "radeon"
(II) Loading /usr/lib/xorg/modules/drivers//radeon_drv.so
(II) Module radeon: vendor="X.Org Foundation"
(II) AIGLX: Loaded and initialized /usr/lib/dri/radeon_dri.so

My /etc/X11/xorg.conf is all defaults, apparently set by dexconf. I have
attempted no tweaking of settings.

I hope that's useful.

Cheers


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