Most of my issues with graphics-intensive applications appear to have
been resolved by upgrading to kernel 3.18.4 (with inel_powerclamp
blacklisted and xorg-edgers), at least with the performance . OTOH. I'm
experiencing some keyboard input lag in Firefox with this configuration
at random
The input lag seems to have resolved itself somewhat. Weird.
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https://bugs.launchpad.net/bugs/1386721
Title:
Graphics Slow After Upgrade 14.04 - 14.10
Status
I'm attaching my dmesg output. There's some i915 messages that seem
relevant.
** Attachment added: Dmesg output
https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1386721/+attachment/4303915/+files/dmesg.out
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Re: #53, I'm running xmonad (with unity-settings-daemon in the
background) so I don't think composting is an issue. Also, these
performance issues began with the upgrade (and seem to apply to any non-
trivial fullscreen OpenGL application), so I assume this is the bug.
For reference, I'm running:
Does/did anyone else have problems with OpenGL-intensive things (for
example Dota 2) periodically freezing (to the point of temporalily
losing custom mouse cursor)?
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Re: my earlier post about blacklisting certain modules, it might be the
case that I had actually worked around a version of bug #1389077 , since
the main symptoms after upgrading to xorg-edgers were random I/O freezes
(mouse, keyboard, audio, or graphics cutting out for a secord or so). I
think
I've experienced a significant (subjective) performance boost by
blacklisting intel_powerclamp and intel_ralp .
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Title:
I'm attaching a Xorg.0.log that has an interesting-looking backtrace
related to the event queue near the end. Maybe this will help with the
issue.
** Attachment added: Xorg.0.log
https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1386721/+attachment/4298427/+files/Xorg.0.log
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Installing xorg-edgers improves general graphics performance, but there
is still some tearing when playing games.
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Title:
The bug (or at least something that seems like the bug) also appears
when running xmonad and unity-settings-daemon.
Are there any known workarounds?
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