The current development release live ISO image does *not* exhibit the
problem.
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https://bugs.launchpad.net/bugs/1182051
Title:
Turning off eDP-1 causes
Personally, I can live fine with the workarounds described in the
Freedesktop.org bug report until Trusty is released. I can't speak for
others, but as you've noticed there doesn't seem to have been a lot of
activity surrounding this bug. For me, it would be OK to close this bug
as fixed in
The patch from https://patchwork.kernel.org/patch/2402211/ makes the
symptoms go away for me when using drm_kms_helper.poll=N.
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This seems to be freedesktop.org bug #64858:
https://bugs.freedesktop.org/show_bug.cgi?id=64858
** Bug watch added: freedesktop.org Bugzilla #64858
https://bugs.freedesktop.org/show_bug.cgi?id=64858
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which is
Public bug reported:
After upgrading to Raring, my X stutters a lot whenever the eDP-1 output
is disabled (for example with xrandr). In this state, the kernel log is
also filled with numerous messages regarding invalid EDID checksums. The
behavior was not seen with Quantal. The problem also
Public bug reported:
After upgrading from 11.10 to 12.04, X keyboard layout behavior has
changed for systems that use an Xorg config file. I have one system
where I need to have such a config file (due to an odd display that
needs a modeline), and in 11.10 the X keyboard layout was defined by
With 2.6.34rc3-51 my system no longer deadlocks when playing video
(855GM, forced KMS makes the system boot with standard Lucid kernel, as
described in bug #511001). I'll leave the computer on for a few days to
see if the hangs I describe in bug #511001 are also gone.
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[i855] [i855] [karmic] X
Have any of you who have been trying 2.6.34rc3-51 experienced Xorg using
abnormally much CPU time? With an idle (KDE) desktop, it seems to be
consuming 10-30 times more CPU than with 2.6.32-22. It's hard to get an
accurate measurement, but it's certainly qualitatively enough for my
laptop's CPU
Update to comment #42: After leaving the computer overnight, I found it in
graphics safe mode (or whatever it's called) the following morning. The last
part of dmesg read:
[29429.364045] [drm:i915_hangcheck_elapsed] *ERROR* Hangcheck timer elapsed...
GPU hung
[29429.364065] render error
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