[Bug 72924] New: GPU overheating after running a full screen GL app on Sandy Bridge

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=72924

          Priority: medium
            Bug ID: 72924
          Assignee: idr at freedesktop.org
           Summary: GPU overheating after running a full screen GL app on
                    Sandy Bridge
        QA Contact: intel-3d-bugs at lists.freedesktop.org
          Severity: major
    Classification: Unclassified
                OS: Linux (All)
          Reporter: krejzi at email.com
          Hardware: x86-64 (AMD64)
            Status: NEW
           Version: git
         Component: Drivers/DRI/i965
           Product: Mesa

Starting recently, when I am running a full screen GL app and stopping it after
some time (be it a native linux game, a wine d3d game or a ogl screensaver on
X, or simple-egl demo on Wayland compositor), my machine continues working at
way higher temperature than it actually should.

It is normal for this laptop that it runs at > 90 °C (100 °C is critical, but
never reached that one) when running a game on linux (~80 °C on ms windows)
since it doesn't have that good cooling system, but normal temperature is
arround 63 °C.

I have discovered, that after I leave my machine idle for some time, it turns
on its screensaver, which is Blue Screen of Death screensaver from xscreensaver
package, which is in turn also OpenGL screensaver and machine stays cool and
quiet. But, when I try to start using my machine again (terminating
screensaver), machine starts working at > 85 °C temperature, even if I didn't
run anything else. CPU usage is reported to be < 1% on all 4 cpu threads. Same
happens with any other OGL app, Wine D3D game or weston-simple-egl demo when
ran fullscreen on Wayland compositor - Weston.

I do not recall that this was an issue with Mesa 9.2 and some pre 10.0
branching version, but it did occour somewhere between 9.2 and 10.0 branching
iirc. I'll try to investigate more.

Installed packages:

linux-3.12.5
libdrm-2.4.50
wayland-1.3.0-21-g1521c62
llvm-195929 (svn revision)
Mesa-10.1.0-g2b404a6
weston-1.3.0-272-ga5059eb
xorg-server-1.14.99.904
xf86-video-intel-2.99.906-98-g9289e2c

All built with gcc-4.8.2, binutils-2.24 and glibc-2.18 (custom system, not
Gentoo).

If some more info is needed, let me know.

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