Bug 24752

Summary:	Random crashes easily reproducible with make -j5 - intel i915 - kernel 2.6.36 on intel/nvidia hybrid graphics machine
Product:	Drivers	Reporter:	Maciej Rutecki (maciej.rutecki)
Component:	Video(DRI - Intel)	Assignee:	drivers_video-dri-intel (drivers_video-dri-intel)
Status:	RESOLVED INSUFFICIENT_DATA
Severity:	normal	CC:	delleceste, florian, jbarnes, kernel, maciej.rutecki, mpagano, rjw
Priority:	P1
Hardware:	All
OS:	Linux
Kernel Version:	2.6.36	Subsystem:
Regression:	Yes	Bisected commit-id:
Bug Depends on:
Bug Blocks:	16444

Description Maciej Rutecki 2010-12-12 14:36:52 UTC

Subject    : Random crashes easily reproducible with make -j5 - intel i915 - kernel 2.6.36 on intel/nvidia hybrid graphics machine
Submitter  : Giacomo <delleceste@gmail.com>
Date       : 2010-12-10 8:57
Message-ID : AANLkTimkQM94u9iz7FVVjehB0mwDwfkNwKhF2F2tYq-r@mail.gmail.com
References : http://marc.info/?l=linux-kernel&m=129197146619176&w=2

This entry is being used for tracking a regression from 2.6.35. Please don't
close it until the problem is fixed in the mainline.

Comment 1 Chris Wilson 2010-12-16 14:43:22 UTC

*** Bug 24542 has been marked as a duplicate of this bug. ***

Comment 2 Giacomo 2010-12-16 19:10:58 UTC

The nouveau module wasn't even compiled when the crash used to happen.
Another detail: kms was built as a module and the machine booted with
kernel parameter i915 modeset=1.

In the kernel 2.6.35 to which I switched back (and where I still haven't
run into this issue so far) kms for intel is built in.

I did not try to switch to nvidia drivers yet.
To do that I would have to blacklist i915 and install nvidia proprietary
drivers I think... so far vga switcheroo does not work for me and nvidia 
proprietary drivers hang the machine if i915 is loaded.

Comment 3 Florian Mickler 2011-01-30 16:08:34 UTC

Giacomo, is this still an issue with 2.6.37?

Comment 4 Giacomo 2011-01-31 11:10:51 UTC

Hi! I use my laptop to work so I could not accept the behaviour I experienced in 2.6.36. If in your opinion changes have been done to the code in order to solve the issue, I will try it with pleasure and let you know.

Thanks for your interest.

Giacomo.

Comment 5 Florian Mickler 2011-01-31 12:35:04 UTC

There were 345 commits to drivers/gpu/drm/i915/*. (and 200+ commits from 2.6.37 to 2.6.38-rc2..)

But other than that, no I have no specific reason to expect the issue to be fixed. So test at your own economic valuation. 


(Without specific (back-) traces, it's hard to know what the issue is.. )

Comment 6 Giacomo 2011-02-27 12:23:46 UTC

I cannot actually use kernel 2.6.37 because I am unable to switch off
the nvidia card due to

http://bugs.gentoo.org/show_bug.cgi?id=351276

In fact, the acpi_call module which I use together with kernel 2.6.35
is able to switch off the card without problems.

With 2.6.37 something went wrong and when I try to switch off the nvidia 
card via acpi_call method the machine hangs.

There must have been a regression as to this aspect.

I'd like to know if there are some good news about vga_switcheroo 
in 2.6.37, so that I can try to use that method instead of acpi_call.

Thanks Giacomo

Comment 7 Florian Mickler 2011-03-29 21:25:51 UTC

Can you retest with 2.6.38.y ?

Comment 8 Jesse Barnes 2012-04-18 20:15:20 UTC

Not sure how this was asigned to gfx, but it's been long enough without an update that either this is fixed or the reporter got a new machine. :)

Giacomo, please re-open if this is still a problem.  A bisect between 2.6.35 and 2.6.36 identifying the problem would help a lot too as it may not be a gfx issue.