[Bug 29412] fans running at full-speed after resume from suspend with radeon and KMS

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=29412


Jonathan Nieder <jrnieder at gmail.com> changed:

           What    |Removed                     |Added
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                 CC|                            |jrnieder at gmail.com




--- Comment #3 from Jonathan Nieder <jrnieder at gmail.com>  2012-03-16 19:05:06 ---
(In reply to comment #2)

> I did bisect to identify the first bad commit as
> 17d857be649a21ca90008c6dc425d849fa83db5c , which is merely tagging 2.6.32-rc1.
> I suspect some user space component is only enabling KMS if the kernel version
> equals or exceeds this tag and that's why it is only triggered from that
> commit.

Thanks.  Odd.  The test the radeon driver uses is

    if (info->dri->pKernelDRMVersion->version_minor >= 5)
      ginfo.request = RADEON_INFO_ACCEL_WORKING2;
    else
      ginfo.request = RADEON_INFO_ACCEL_WORKING;

which wouldn't be affected by utsversion.  So, questions:

1) Is that bisection result reproducible?  I.e., if you do:

 cd linux
 git checkout v2.6.32-rc1
 cp /boot/config-$(uname -r) .config; # current configuration
 make localmodconfig; # optional: minimize configuration
 make deb-pkg; # optionally with -j<num> for parallel build
 dpkg -i ../<name of package>; # as root
 reboot
 ... test test test ...

 cd linux
 git checkout HEAD^
 make deb-pkg; # maybe with -j4
 dpkg -i ../<name of package>
 reboot
 ... test some more ...

does the first package produced reproduce the misbehavior and
the second one not?

2) Can you reproduce this without X?  What happens if you boot
in recovery mode, run "modprobe radeon" to make sure the driver
is loaded, and suspend?

3) An attachment with "dmesg" output (and /var/log/Xorg.0.log if
X seems to be involved) from a non-working kernel would also be
interesting.

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