https://bugzilla.kernel.org/show_bug.cgi?id=64891

Tommaso Falchi Delitala volalto86@gmail.com changed:

What |Removed |Added ---------------------------------------------------------------------------- CC| |volalto86@gmail.com

--- Comment #46 from Tommaso Falchi Delitala volalto86@gmail.com --- Created attachment 181501 --> https://bugzilla.kernel.org/attachment.cgi?id=181501&action=edit dmesg showing lockpuos (radeon off)

I still experience lockups related to audio with discrete card disabled via vgaswitcheroo. Moreover the systems hangs at shutdown.

Kernel 4.0.6-1-ARCH AMD Mobility Radeon HD5470 + intel integrated.

# cat /sys/kernel/debug/vgaswitcheroo/switch 0:IGD:+:Pwr:0000:00:02.0 1:DIS: :DynOff:0000:01:00.0 2:DIS-Audio: :Off:0000:01:00.1

Interesting dmesg print:

snd_hda_intel 0000:01:00.1: Disabling via VGA-switcheroo snd_hda_intel 0000:01:00.1: Cannot lock devices! INFO: task kworker/u16:0:6 blocked for more than 120 seconds. Tainted: G W 4.0.6-1-ARCH #1 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. kworker/u16:0 D ffff880132fd7ca8 0 6 2 0x00000000 Workqueue: hd-audio1 hdmi_repoll_eld [snd_hda_codec_hdmi]

See complete dmesg in attachment.