Sorry for not answering, just wanted to let you know its all working as
it should now.
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Title:
RC6 enabled causes severe graphics corruption
To m
Thanks everyone for all of the testing and feedback. The current RC6
patches we are carrying sound most promising. For now I'm going to mark
this bug Fix Released. We intend to carry these patches for the 12.04
release assuming we do not discover any other show stopping regressions
with the RC6
3.2.0-17.27 seems to fix rc6-related graphics problems also on my
machine:
Lenovo X220
Version: 8DET54WW (1.24 )
00:02.0 VGA compatible controller [0300]: Intel Corporation 2nd Generation
Core Processor Family Integrated Graphics Controller [8086:0126] (rev 09)
With previous kernel, 3.2.0-
OK i have tested kernel from comment #13 all day and could not reproduce
the graphical glitches neither in Chrome or Firefox or any other app in
Unity 3D. I guess the new patch work as expected.
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Hi All,
We just uploaded a new ubuntu kernel, 3.2.0-17.27. It contains the fix
Robet mentioned in comment #13. We believe this should resolve the
issue you are seeing here. If you could please test and let us know
your results, it would be greatly appreciated. Thanks.
https://launchpad.net/ub
I just install it, would test and give all the feedback you need.
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Title:
RC6 enabled causes severe graphics corruption
To manage notifications a
Daniel: Thank you so much for testing it out! Jorge and Björn: would you
mind trying the new kernel out? It's going to be released as -18 soon
and it'd be much appreciated, we noticed a problem with 3.2.0-17 that
should account for your problems and be fixed in the new one but want to
be sure.
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This kernel seems much more usable with the default setting, i.e., *no*
disabling of RC6 specified on the kernel command line. I've tested with
Unity, Unity 2d, and cinnamon; no noticeable graphical glitches have been
visible.
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Jorge, Daniel or Björn, apologies for throwing more testing at you, but
would you mind giving this kernel a try to see if it fares any better
for you on your laptops?
http://kernel.ubuntu.com/~sarvatt/rc6/
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Björn: Does it go away with i915.i915_enable_rc6=0 added to your kernel
command line? Can you also please file a new bug with ubuntu-bug linux
and duplicate it to this one if it does go away with that? We really
need the unique information from every machine with problems, at this
point it looks li
** Tags added: rc6
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Title:
RC6 enabled causes severe graphics corruption
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Having the same problem i think, though its really minor. 3 or four
times since i upgraded to 12.04 the day before yesterday and i think its
just in firefox (though i've been using that most of the time so that
can be the reason). One time it was just the X:s that you close the tabs
with that were
Ok i just created a new bug report here
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/938833 with the
information you need.
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Title:
RC6 ena
#7 I was using drm.vblankoffdelay=1 i just remove it from the
etc/default/grub, update grub and start testing with no kernel
parameters to see if I can reproduce the bug that seem to only appear in
web browsers.
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Jorge, would you mind please filing a new bug with ubuntu-bug linux that
we can duplicate to this one just so we can have your specific machine's
hardware information for working out an eventual quirk for them?
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are u using framebuffer compression or lvds downclock or any other
special aprameters for the intel driver/kernel?
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Title:
RC6 enabled causes seve
Assigning myself to this bug so that we keep track of it. This is a
direct result of us having enabled RC6 by default in the 3.2.0-17.26
kernel.
** Also affects: linux (Ubuntu Precise)
Importance: High
Status: Confirmed
** Changed in: linux (Ubuntu Precise)
Status: Confirmed =>
** Changed in: linux (Ubuntu)
Importance: Undecided => High
** Tags added: kernel-da-key kernel-key
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Title:
RC6 enabled causes severe graphics
** Attachment added: "Screenshot at 2012-02-21 10:03:55.png"
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/935965/+attachment/2766488/+files/Screenshot%20at%202012-02-21%2010%3A03%3A55.png
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I did some testing for the last 3 days with Precise Kernel and freezes
are finally out of the picture but there are very rare glitches in
Chrome and Firefox, I can't reproduce them in other parts of the desktop
which is really weird, because i could reproduce them in Oneiric with
rc6 manually activ
Most of the artifacts are portions of application windows that do not
refresh properly, e.g., they remain across all virtual desktops. With
slightly lesser frequency are triangular textures that consume a quarter to
a third of the upper or lower horizontal edge of the virtual desktop. With
very lim
Can you describe the corruption please? Can you take a picture of it?
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Title:
RC6 enabled causes severe graphics corruption
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** Changed in: linux (Ubuntu)
Status: New => Confirmed
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Title:
RC6 enabled causes severe graphics corruption
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Title:
RC6 enabled causes severe graphics corruption
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