At Fri, 08 Jun 2012 13:26:57 +0200, Jörg-Volker Peetz wrote:

Takashi Iwai wrote, on 06/07/12 12:15:

...

Hi,

this is a series of patches to fix the regressions of HD-audio HDMI on D-GPUs in 3.5-rc1 due to the support of VGA-switcheroo audio clients.

The first patch adds a new helper function to vga-switcheroo and the second just uses that instead of an open code.

Dave, if the first patch is OK, I'm going to apply it though sound tree. Let me know if any problem is found.

Joerg, could you check whether this doesn't break your setup, too?

thanks,

Takashi

Hello Takashi,

I applied both your patches on 3.5-rc1. With this kernel I made three tests.

1. After booting I switched off the discrete GPU via vga_switcheroo. Then ca. 210 times the message

   hda-intel: spurious response 0x0:0x0, last cmd=0x170503

   appears on the console and in the logs. Starting X and using the built-in USB web-cam work, as well as sound with mplayer2 works.

2. After booting I switched to the discrete GPU via

   echo -n DDIS > /sys/kernel/debugfs/vgaswitcheroo/switch

   Then I started X via startx. The desktop screen appears but the system freezes. No reaction on keyboard or touchpad input. The computer is not reachable via ethernet wire.

Hm, these issues aren't seen on 3.5-rc1 before my patches? If so, we need to fix now.

3. After booting the machine freezes (hard-lock) when trying to switch to dynamic power mangement on the integrated GPU via

   echo -n dynpm > /sys/class/drm/card0/device/power_method

at least two trace calls are done. On the console only the last two lines of one call trace and the last one are visible (machine is frozen). It says (typed by hand, therefore, not complete):

This is an irrelevant issue with my patches.

thanks,

Takashi