[Bug 53111] vgaswitcheroo not working anymore

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=53111





--- Comment #6 from Alexander Mezin <mezin.alexander at gmail.com>  2013-02-19 14:55:44 ---
Created an attachment (id=93541)
 --> (https://bugzilla.kernel.org/attachment.cgi?id=93541)
Workaround

I found a workaround.

atpx->functions.power_cntl is 0 on my machine. Without this check switcheroo
works again.

lspci:
00:02.0 VGA compatible controller: Intel Corporation 2nd Generation Core
Processor Family Integrated Graphics Controller (rev 09)
        Subsystem: Hewlett-Packard Company Device 3388
01:00.0 VGA compatible controller: Advanced Micro Devices [AMD] nee ATI
Whistler XT [AMD Radeon HD 6700M Series] (rev ff)

It's muxless system.

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