[Bug 56911] Switching to i915 cause a black screen on macbookpro 8,2

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=56911

Thomas Berger <ridershome at gmail.com> changed:

           What    |Removed                     |Added
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                 CC|                            |ridershome at gmail.com

--- Comment #7 from Thomas Berger <ridershome at gmail.com> ---
Same/similar issue here, Arch Linux, kernel 3.14.5, Thinkpad T430 (two muxless
cards: NVS 5400M, Intel 4000). When I boot with the Nvidia switched on in
/etc/tmpfiles.d:

w /sys/kernel/debug/vgaswitcheroo/switch - - - - DDIS
w /sys/kernel/debug/vgaswitcheroo/switch - - - - ON

the screen attached to the Intel card is black. I see in the logs "i915:
switched off". After X started I can write "ON" to
/sys/kernel/debug/vgaswitcheroo/switch and the screen attached to the Intel
card is working.


This bug report has the status NEEDINFO. What info do you need?

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