https://bugzilla.kernel.org/show_bug.cgi?id=51381 --- Comment #22 from Teofilis Martisius <Teofilis.Martisius@xxxxxxxxx> --- 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 -- You are receiving this mail because: You are watching the assignee of the bug. _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/dri-devel