[Bug 88012] [bisected BYT] complete freeze after: drm/i915/vlv: WA for Turbo and RC6 to work together

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=88012

--- Comment #113 from cffwet <cffwet at gmail.com> ---
I have system freezes on ASRock Q1900-ITX with a kernel 3.19.31-generic on an
Ubuntu distro. I upgraded to kernel 4.2.0-16-generic last month and recently to
4.2.0-18-generic. The system freezes got worse (less than 10 min watching
videos).

I disabled hardware acceleration in all software with this option, like in my
browsers. Further I edited the file /etc/default/acpi-support: I disabled
suspend/hibernate handling in acpi-support by changing the line
"SUSPEND_METHODS="dbus-pm dbus-hal pm-utils" to "SUSPEND_METHODS="none".

I don't get any freezes anymore, now for 24h for both kernels 3.19.31-generic
and 4.2.0-18-generic with a lot of video playing. I didn't tested on kernel
4.2.0-16-generic.

I tested disabling hardware acceleration without changing the acpi-support
file. And I tested disabling suspend/hibernate handling with hardware
acceleration. In both cases I still got freezes but it seems less frequent. I
needed both options disabled to get rid of all the freezes.

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