[Bug 51381] [drm:atom_op_jump] *ERROR* atombios stuck in loop for more than 5secs aborting, when disabled via vgaswitcheroo

[bugzilla-daemon@bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=51381

--- Comment #22 from Teofilis Martisius <Teofilis.Martisius@gmail.com> ---
Ok,

I tried playing around with Linux 3.12, that's the last stable version before
that commit.

Booted with parameters:

[    0.000000] Command line: BOOT_IMAGE=/boot/vmlinuz-3.12-1-amd64
root=UUID=... ro quiet radeon.audio=0 modeset=1 radeon.dpm=1 radeon.no_wb=1
radeon.runpm=0

Executed:

echo OFF >/sys/kernel/debug/vgaswitcheroo/switch

dGPU got switched off, everything works fine. Got a message in dmesg:

[ 1454.396648] radeon: switched off

I don't want to spam attachments on this bug report, full dmesg output if
needed at:
http://menulis.org/kernel/dmesg_3.12_off1.log

I tried it with radeon.runpm=1 as well, same results, everything works fine.
Dmesg:
http://menulis.org/kernel/dmesg_3.12_off2.log

Let me know if you want these two dmesg logs attached here in bugzilla.

Let me know if you need me to try something else next.

Sincerely,
Teofilis Martisius

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