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On 2012-05-31T08:26:32+00:00 Jesse Sung wrote:

Ref: https://bugs.launchpad.net/bugs/1002170

Hi,

Lenovo ThinkCentre S510 (SandyBridge i5-2500S) may hang after idling for
some period of time. This may be related to rc6 since that if I add
i915.i915_enable_rc6=0 to boot parameter then this issue is gone.

This issue also happens on kernel 3.4.

A screenshot when system hangs:
https://launchpadlibrarian.net/105661463/Photo%2012-5-18%2017%2038%2038.jpg

If there's any other information needed, please kindly let me know.

Thank you.

Reply at: https://bugs.launchpad.net/linux/+bug/1002170/comments/4

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On 2012-06-01T00:16:38+00:00 Daniel-ffwll wrote:

Please attach dmesg with drm.debug=0xe added to your kernel commandline.
Also, how dead is the system? I.e. does network/ssh still work, does the
magic SysRq to reboot still work, or is it a true hard-hang? And can you
try to wire up netconsole so that we could have a peak at the last
breaths of the system before it goes down?

Reply at: https://bugs.launchpad.net/linux/+bug/1002170/comments/7

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On 2012-06-15T02:22:27+00:00 Jesse Sung wrote:

Created attachment 63062
netconsole output

Hi Daniel,

Please find the attached file for netconsole output.

When it hangs, neither SysRq magic nor network/ssh works. From ssh
terminal I can tell that it died after 57 minutes, but the last entry in
the log is at 1787.315652, so there's no log when the system goes down.

Reply at: https://bugs.launchpad.net/linux/+bug/1002170/comments/8

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On 2012-06-15T02:28:12+00:00 Daniel-ffwll wrote:

Can you also attach dmesg so that we have all the interesting lines from
boot-up with drm.debug=0xe, too?

Reply at: https://bugs.launchpad.net/linux/+bug/1002170/comments/9

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On 2012-06-15T02:36:51+00:00 Jesse Sung wrote:

Created attachment 63064
dmesg

dmesg is attached.

Thank you.

Reply at: https://bugs.launchpad.net/linux/+bug/1002170/comments/10

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On 2012-07-02T18:55:07+00:00 Jesse Sung wrote:

Hi Daniel,

Is there anything I can do to get more info about this issue?

Reply at: https://bugs.launchpad.net/linux/+bug/1002170/comments/11

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On 2012-07-03T01:30:49+00:00 Daniel-ffwll wrote:

I'm running a bit low on ideas, but one thing would be to stop all drm
clients (i.e. X) and check whether it still hangs. We still need to load
the drm/i915.ko driver, because only when we load and enable rc6 can the
cpu die actually reach the lowest power state, i.e. I want to check
whether this might be an issue outside of the gpu, only brought to light
due to the low power state.

Reply at: https://bugs.launchpad.net/linux/+bug/1002170/comments/12

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On 2012-07-06T02:07:05+00:00 Jesse Sung wrote:

Daniel,

Tried with a normal boot, and stopped all X related processes. System
hangs after 15 hours.

Reply at: https://bugs.launchpad.net/linux/+bug/1002170/comments/13

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On 2012-07-06T02:23:57+00:00 Chris Wilson wrote:

Ok, what happens if the i915 is never loaded at all? Try something like adding
blacklist i915 to modprobe.conf, or append i915.noload to your kernel 
commandline.

Reply at: https://bugs.launchpad.net/linux/+bug/1002170/comments/14

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On 2012-07-23T05:19:51+00:00 Jesse Sung wrote:

Hi Chris,

By adding i915 into blacklist and using text mode, system runs without
any problem and has "2 days, 19:15" uptime so far.

Reply at: https://bugs.launchpad.net/linux/+bug/1002170/comments/15

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On 2012-08-22T09:19:35+00:00 Jesse Sung wrote:

Created attachment 65942
disable rc6 for some models

Hi Daniel and Chris,

Since there's another snb machine does not work well when rc6 is enabled
( https://launchpad.net/bugs/1008867 ), maybe we can just disable rc6
for these machines to make them at least work?

Reply at: https://bugs.launchpad.net/linux/+bug/1002170/comments/17

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On 2012-08-22T23:12:07+00:00 Ben-chgtaa3qpp0 wrote:

By any chance, does this patch help?
https://patchwork.kernel.org/patch/1363021/

Reply at: https://bugs.launchpad.net/linux/+bug/1002170/comments/18


** Changed in: linux
       Status: Unknown => In Progress

** Changed in: linux
   Importance: Unknown => Medium

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