[Mesa-dev] [Bug 87886] constant fps drops with Intel and Radeon

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=87886

Stéphane Travostino <stephane.travostino at gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEEDINFO                    |RESOLVED
         Resolution|---                         |NOTABUG

--- Comment #30 from Stéphane Travostino <stephane.travostino at gmail.com> ---
Solved!

Yes, forcing the min/max i915 freq didn't stop the GPU from going to the low
frequency by itself, so as you say it's something outside the control of the
kernel.

This machine is a Sony Vaio VPCSA series, and has a "sony_laptop" module to
control keyboard backlight, and.. thermal control.

By default "/sys/devices/platform/sony-laptop/thermal_control" is set to
"balanced", changing it to "performance" I get:

- Stable FPS on both Intel & Radeon
- Intel CAGF frequency stable on max when running intensive OpenGL operations
- No more FPS drops

Thanks everybody for the help troubleshooting this, marking this as NOTABUG.

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