https://bugzilla.kernel.org/show_bug.cgi?id=55941
Summary: Hybrid graphics i915/radeon. Switch to radeon results to black screen Product: Drivers Version: 2.5 Kernel Version: 3.8.4 Platform: All OS/Version: Linux Tree: Mainline Status: NEW Severity: normal Priority: P1 Component: Video(DRI - non Intel) AssignedTo: drivers_video-dri@kernel-bugs.osdl.org ReportedBy: damigos@freemail.gr Regression: No
Created an attachment (id=96611) --> (https://bugzilla.kernel.org/attachment.cgi?id=96611) lspci
I have installed Arch Linux on a Dell Inspiron R15 with hybrid Intel/AMD graphics. vga_switcheroo is enabled and I can control radeon power with "echo ON/OFF > /sys/kernel/debug/vgaswitcheroo/switch". But when I try to switch to radeon in console with "echo DIS > /sys/kernel/debug/vgaswitcheroo/switch" the screen turns off. I can switch back to intel with "echo IGD > /sys/kernel/debug/vgaswitcheroo/switch" by blind typing it, and then the screen turns back on.
https://bugzilla.kernel.org/show_bug.cgi?id=55941
--- Comment #1 from Dimitris Damigos damigos@freemail.gr 2013-03-29 18:53:19 --- Created an attachment (id=96621) --> (https://bugzilla.kernel.org/attachment.cgi?id=96621) dmesg
https://bugzilla.kernel.org/show_bug.cgi?id=55941
--- Comment #2 from Dimitris Damigos damigos@freemail.gr 2013-03-29 18:54:12 --- I also tried 3.0.70 lts and instead of the screen turning off, it just freezes.
https://bugzilla.kernel.org/show_bug.cgi?id=55941
Alex Deucher alexdeucher@gmail.com changed:
What |Removed |Added ---------------------------------------------------------------------------- CC| |alexdeucher@gmail.com
--- Comment #3 from Alex Deucher alexdeucher@gmail.com 2013-03-29 20:59:13 --- You have a muxless powerxpress system so there are no displays physically connected to the radeon card. The only way to utilize the radeon card is for offscreen rendering (radeon renders application frame and the frame is copied to the intel card for display). You need the new gpu hotplug features in xserver 1.13.x or 1.14 to utilize the card in that manner.
https://bugzilla.kernel.org/show_bug.cgi?id=55941
laurent.debian@gmail.com changed:
What |Removed |Added ---------------------------------------------------------------------------- CC| |laurent.debian@gmail.com
--- Comment #4 from laurent.debian@gmail.com 2013-04-06 01:55:28 --- I have been very puzzled when reading your last message Alex, since I got (on debian) the exact same problem with a Mux system intel Ironlake/radeon Hd5650. The same issue occurs with kernel 3.7.6 (compiled by me) while the switch works correctly one the "distrib" kernel 3.2.0-4-ppae. Another issue appears with kernel 3.8.5 (with the NEW default modesetting bla for radeon..) but in that case X seems to crash (well i don't really now what's happening only got the little "-" on the top left of my screen) I would be glad to give any addiotionnal infos relevant or to file a bug myself.
(In reply to comment #3)
You have a muxless powerxpress system so there are no displays physically connected to the radeon card. The only way to utilize the radeon card is for offscreen rendering (radeon renders application frame and the frame is copied to the intel card for display). You need the new gpu hotplug features in xserver 1.13.x or 1.14 to utilize the card in that manner.
https://bugzilla.kernel.org/show_bug.cgi?id=55941
--- Comment #5 from laurent.debian@gmail.com 2013-04-06 02:03:48 --- By the way this it should be the duplicated of Bug 55311.
https://bugzilla.kernel.org/show_bug.cgi?id=55941
--- Comment #6 from Alex Deucher alexdeucher@gmail.com 2013-04-07 16:30:00 --- (In reply to comment #4)
I have been very puzzled when reading your last message Alex, since I got (on debian) the exact same problem with a Mux system intel Ironlake/radeon Hd5650.
On mux-less systems you can't switch the displays since there are no displays connected to the dGPU.
https://bugzilla.kernel.org/show_bug.cgi?id=55941
Alan alan@lxorguk.ukuu.org.uk changed:
What |Removed |Added ---------------------------------------------------------------------------- Status|NEW |RESOLVED CC| |alan@lxorguk.ukuu.org.uk Resolution|--- |DOCUMENTED
https://bugzilla.kernel.org/show_bug.cgi?id=55941
Alan alan@lxorguk.ukuu.org.uk changed:
What |Removed |Added ---------------------------------------------------------------------------- Status|RESOLVED |CLOSED
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