Yes, saucy has the requisite kernel. Thanks!
** Changed in: xserver-xorg-video-intel (Ubuntu)
Status: New => Fix Released
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Well, I think this bug should be "Fix released" now.
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https://bugs.launchpad.net/bugs/1188874
Title:
[gm45] Environment lagging randomly
To manage notification
(I couldn't remember if that was in 3.10 or 3.11...)
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Title:
[gm45] Environment lagging randomly
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It seems that this bug was fixed in kernel 3.10.
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=b543fb0464ddf30a5b554957fd212eb7a2acac65
I'll try to use this kernel.
To anyone who want to test:
cd /tmp
wget http://ubuntued.info/kernels/kernel-3.10.0 -O kernel-3.10.0
c
\o/ That is a hotplug IRQ storm. It's good news that we now know the
problem! If you try drm-intel-nightly (ppa:mainline) that kernel has
some hotplug mitigation code to prevent such storms.
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I found related bugs: #1088017, #1087677, #957298
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https://bugs.launchpad.net/bugs/1188874
Title:
[gm45] Environment lagging randomly
To manage notifications a
Attached is the dmesg result. The part that I paste there is when there
is a lag.
** Attachment added: "dmesg.txt"
https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/1188874/+attachment/3723602/+files/dmesg.txt
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I just noticed... X is in the 'D' process state That should never
happen! Basically the only times where we do anything uninterruptible is
during a modeset.
Maybe a drm.debug=6 dmesg during the slow time will help?
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Attached a video of the screen. As you can see, there is a lag in the
start of the glxgears. When I press the Super button, the fps of
glxgears becomes normal.
** Attachment added: "screen.webm"
https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/1188874/+attachment/3719314
Well, it seems that this is not a complete workarround because the
system continues to lag, the difference is that it is less lagggy.
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I found a workarround that fix the problem for a while. In CCSM I
enabled the option "Force full screen redraws (buffer swap) on repaint".
The environment seems to not lag anymore.
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Can you describe what you mean by lagging? Does the mouse move fluidly?
Is the keyboard and mouse clicks quick? Is it redrawing of applications
that slows? Perhaps glxgears shows an effect?
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Not easily as the trick is to correlate the logs with the lagging.
tracecmd record -e i915 will give you a lot of information about what is
going on in the driver, but is not very useful without knowing where to
look.
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whi
I tried to run this command with no success.
I tried to change the cpu scaling with no success either.
Is there some specific debug I can get related to 3D/Composite?
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That command disables the kernel polling for new outputs, it should be
using hardware interrupts anyway.
Another thing you can try is whether change cpufreq scaling governor
makes a difference, in particular using performance. For instance, the
memory clocks are driven by the CPU clock so as cpufr
Well, I rally tried to identify the cause of this problem but with no
success. There isn't a pattern. Anyway, I'm almost sure that is the
video driver because of the following: one thing I forgot to mention is
that, as a workaround, when the system is lagging I press the "Super"
button to open the
Then we are relying on your powers of observation and description to
identify the cause and effect. One key question is whether this effect
is periodic? In which case does 'echo 0 >
/sys/modules/drm_kms_helper/parameters/poll' help?
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