@page p make sure that you're modules match your kernel version. Don't
mean to be condescending, but that's a common error.
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This does not appear to be exclusive to the nouveau or xorg. I've been
able to reproduce it at the console by plugging in display port without
X11 running.
I open htop, everything looks fine. Then I plug in the display port
cable and the CPU immediately shoots up to 100%.
I've also loaded the
This does not appear to be exclusive to the nouveau or xorg. I've been
able to reproduce it at the console by plugging in display port without
X11 running.
I open htop, everything looks fine. Then I plug in the display port
cable and the CPU immediately shoots up to 100%.
I've also loaded the
Well I'd much prefer to use just a normal HDMI monitor, but i work at a Mac
shop and i'm stuck with a cinema display...
I guess the price of the cinema display might be inhibitive? How many people
really buy macs to run linux on them? My guess is that this is why this bug is
rated so low
Note: kworker/0:1 was found to have extremely CPU usage through ps
-auxf:
root 15854 50.0 0.0 0 0 ?R17:35 2:09 \_
[kworker/0:1]
There are a number of other threads with similar output:
kworker/0:3-1128 [000] d.s2 1973.688813: workqueue_queue_work: work
Progress:
kworker/0:1-15854 [000] d.h4 1821.296727: workqueue_queue_work: work
struct=819b1920 function=console_callback workqueue=88046d17ba00
req_cpu=32 cpu=0
kworker/0:1-15854 [000] d.h2 1821.302144: workqueue_queue_work: work
struct=819b85e0
The code in question appears to be:
http://lxr.free-
electrons.com/source/drivers/gpu/drm/nouveau/nouveau_connector.c#L915
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Though it's just a wrapper for:
http://lxr.free-
electrons.com/source/drivers/gpu/drm/drm_crtc_helper.c#L884
Theory:
For some reason, it is constantly toggling between DRM_MODE_DPMS_ON for
some reason.
Maybe we should report this bug against nouveau and probably the intel
drivers as they will
My (assumed) kernel trace:
http://lxr.free-
electrons.com/source/drivers/gpu/drm/nouveau/nv50_display.c#L2201 -
attempts to create the display here:
http://lxr.free-electrons.com/ident?i=nouveau_connector_create
Later on in the function there is some display port related code...
wonder if it
I've created this issue against nouveau kernel driver:
https://bugs.freedesktop.org/show_bug.cgi?id=77073
** Bug watch added: freedesktop.org Bugzilla #77073
https://bugs.freedesktop.org/show_bug.cgi?id=77073
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Oohh!! Found something very interesting in this log:
https://bugs.freedesktop.org/attachment.cgi?id=96925
drm:drm_helper_hpd_irq_event is being fired a lot, which is likely the
cause of the kernel workers?
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They pointed to this bug:
https://bugs.freedesktop.org/show_bug.cgi?id=76732
** Bug watch added: freedesktop.org Bugzilla #76732
https://bugs.freedesktop.org/show_bug.cgi?id=76732
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The main thing I've been able to gleam is that the bug first appeared in
3.9, so I'm going to try rolling back to 3.8.13 (and earlier) to see if
that resolves the issue. It would be awesome to be able to bisect the
exact point when this issue was introduced.
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This should be closed as a duplicate of
https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-
nouveau/+bug/1248256
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Another possible (but hilarious fix) is to comment out a line as
suggested here:
https://bugs.freedesktop.org/show_bug.cgi?id=76732#c22
Haven't tried that one yet, but 3.8-rc6 should be clean as it is before
0a0afd282fd715dd63d64b243299a64da14f8e8d, which is the first bad commit.
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I can confirm 3.8-rc6 resolves this problem.
So, if rolling back your kernel is an option I would suggest trying
that. Otherwise, keep an eye on the upstream ticket.
Hope all this helps guys!
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I should probably mention I'm not using ubuntu at all, I'm using gentoo,
so it's a lot easier for me to switch around my kernel...
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