Takashi Iwai wrote, on 06/08/12 17:52:
At Fri, 08 Jun 2012 17:45:17 +0200, Jörg-Volker Peetz wrote:
Hello Takashi,
Takashi Iwai wrote, on 06/08/12 15:03:
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.
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.
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.
No, these issues aren't seen on 3.5-rc1 without your patches. I'm able to start X with the discrete GPU in use, direct rendering and the built-in USB camera work.
OK, it means that the switching from the audio-ON to audio-OFF doesn't work. Could you try the patch below in additon?
Applying all your three patches on 3.5-rc1 makes the discrete GPU work on my system: after mounting debugfs and switching to "DDIS", I can start X and direct rendering, sound and built-in USB camera work.
By the way, writing "DDIS" to /sys/kernel/debugfs/vgaswitcheroo switches off the integrated GPU. That's the reason for loosing the control over the screen brightness. Switching on also the integrated GPU (writing "ON" to /sys/kernel/debugfs/vgaswitcheroo) enables the brightness control of the screen. Of course for the energy consumption this is awkward. I write all this as information about the state of vga_switcheroo for David.
Many thanks to you and David for all your work.
Probably unrelated: in both cases I'm unable to lower the screen brightness from highest value. Without your patches it appears a warning:
ACPI Warning: _BQC returned an invalid level (20120320/video-472)
Hmm, I see no relation between this and the HDMI audio part. It's of course possible that some non-working state gives side-effects...
thanks,
Takashi
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