OK - condition reproduced - I changed the mem as per SoW's instructions,
opened a bunch of programs (ff, libre office) and watched the mem use on
the system monitor. At about 80% swap (mem 55%ish?), the main menu text
became corrupted. I continued to open tabs with active content in ff to
zermerica:
Hmm! How long did it take for the corruption to appear back when you had
512Mbytes of RAM (was it after 12 hours as in the original bug report)?
Additionally, now you have the extra memory, can you reliably reproduce the
error by setting mem=512M kernel boot parameter temporarily?
SoW - it varied in timing but I don't think I ever made it 12 hours - 2
hours max I'd say... sometimes almost immediately - but it would always
be when I was maxing my mem-usage
I'm pretty new to this ... I tried rebooting, holding shift to enter the
grub loader editing it by adding a line set
update: I formerly had 512Mb ram - I installed another 2G ram today and
no problems where before it was to the point my system was nearly
unusuable. Yay! :)
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Corruption of desktop background (often), application windows (rarer)
and Firefox/Thunderbird fonts (rarest) on 2GB RAM, especially during and
after high memory usage. Corruption occurs in Unity3D, Gnome 3 Shell,
and Gnome Classic.
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I have this problem in Unity 2D, 3D, Gnome Classic (which are all I've tried)
I've tried modifying xorg.conf in several different ways, to no avail:
tiling-false, debugwait true. It's gotten worse with Oneric - I had some Video
RAM ## solution in xorg.conf that I'll post the link to if I find
Some observations:
running on a 1GB RAM machine, i see this corruption in a unity3d session while
i still have plenty (250MB) of free RAM.
The bug is particularly prevalent on Unity3D menus and text.
I cannot reproduce this when running uncomposited Unity2D session
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Tried with Ubuntu Oneiric beta and the corruption is still there.
The versions in beta are:
xserver-xorg-video-intel 2:2.15.901-1ubuntu2
linux-headers-generic 3.0.0.9.10
I attach the picture of the corruption, which seems to be of the same
pattern as before.
** Attachment added:
Christian: The hypothesis of memory running low causing the problems
seems to cohere with the symptoms, because for me too, the corruption
appears when lots of applications have been opened for one user or many
users logged in at the same time.
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I get the exact same screen corruption on a thin client system with 512
MB system memory. The corruption occurs when running applications
locally on the thin client at the moment when memory starts running low.
I know the 82945G/GZ uses shared system memory - can this be part of the
issue?
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** Changed in: xserver-xorg-video-intel (Ubuntu)
Status: New = Confirmed
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https://bugs.launchpad.net/bugs/820881
Title:
[i945] Heavy screen and font corruption on GMA950
To
** Tags added: corruption
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https://bugs.launchpad.net/bugs/820881
Title:
[i945] Heavy screen and font corruption on GMA950
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It seems the bug appears only when more than one users are
simultaneously logged into the system. At least logging into system one
user at time seems to help a lot in avoiding the bug. This may also be
the reason why bug is not common for most users and not so easily
detected (according to
The kernel reported in apport was Linux 2.6.38-10-generic .
tabbernuk:
Do you also get corruption when you use a non-compositing desktop (i.e. no
desktop effects, old fashioned metacity)?
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tabbernuk:
There is speculation that your issue is tiling related and you would need the
_kernel_ patch from
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=e28f87116503f796aba4fb27d81e2c3d81966174
to resolve this issue (it was included in the 3.0 kernel)... I'm not
** Summary changed:
- Heavy screen and font corruption on GMA950
+ [i945] Heavy screen and font corruption on GMA950
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Title:
[i945] Heavy screen
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