| Summary: | Automatic radeon GPU switching added in kernel 3.13 breaks pulseaudio sound in gnome session | ||
|---|---|---|---|
| Product: | Gentoo Linux | Reporter: | Garri <g.djavadyan> |
| Component: | [OLD] GNOME | Assignee: | Gentoo Linux Gnome Desktop Team <gnome> |
| Status: | RESOLVED TEST-REQUEST | ||
| Severity: | normal | CC: | kernel, x11 |
| Priority: | Normal | ||
| Version: | unspecified | ||
| Hardware: | All | ||
| OS: | Linux | ||
| URL: | https://bugs.freedesktop.org/show_bug.cgi?id=67946 | ||
| See Also: | https://launchpad.net/bugs/1210470 | ||
| Whiteboard: | |||
| Package list: | Runtime testing required: | --- | |
|
Description
Garri
2014-03-29 20:38:56 UTC
And, why is the card being disabled by the kernel even if it's used? (not sure if the kernel is acting ok :/) Sorry, I failed to explain that my laptop uses hybrid graphics (integrated Intel and discrete Radeon). So I have 2 GPU and 2 sound devices (integrated Intel HDA and AMD HDMI Audio on discrete GPU). I never used discrete GPU and always disabled it via vgaswitcheroo on startup. So X system and pulseaudio always saw only 1 Intel GPU and 1 Intel HDA. As kernel 3.13 introduced Automatic GPU switching for radeon (http://kernelnewbies.org/Linux_3.13#head-f95c198f6fdc7defe36f470dc8369cf0e16898df), kernel no longer reacts to scripts used on startup to disable discrete GPU. But automatically controls the switching process when performance needed (https://wiki.archlinux.org/index.php/Hybrid_graphics#The_New_Dynamic_Switching_Model). At the moment I faced problems only with automatically disabled HDMI audio, as that results in hanged pulseaudio process spawned by GDM. And the hanged process prevents user's pulseaudio process to access Intel HDA. Could you take a look to: https://bugs.launchpad.net/ubuntu/+source/pulseaudio/+bug/1210470 https://bugs.freedesktop.org/show_bug.cgi?id=67946 to see if they could be related with your issue? Yes, it looks like pulseaudio can't correctly handle the event that audio device is powered down. I'll try to add some details in upstream. Thank you! Well, upstream report points to X11 :/ kernel issue, not X11 (In reply to Chí-Thanh Christopher Nguyễn from comment #6) > kernel issue, not X11 Still valid with latest kernel? If that is the case, I would report to upstream (kernel per previous comment) -> bugzilla.kernel.org (In reply to Pacho Ramos from comment #7) > (In reply to Chí-Thanh Christopher Nguyễn from comment #6) > Still valid with latest kernel? If that is the case, I would report to > upstream (kernel per previous comment) -> bugzilla.kernel.org I've tested the problem using 3.15.2 kernel. Can't reproduce it anymore. Seems like the bug have been resolved. Many thanks! (Can I close the report, as there are no more people affected by the bug?) As it turned out, the third system reboot showed that problem is not resolved. what is the status of this with a full updated system and kerne-4.0.5?(or newer) (In reply to Pacho Ramos from comment #10) > what is the status of this with a full updated system and kerne-4.0.5?(or > newer) Hello, I tried to verify the problem using kernel 4.1.1-gentoo-r1 and Xorg 1.17.1-r1, but I could not start user session. Here error messages, no related to the bug report: Jul 12 15:13:17 gentoo.local /usr/libexec/gdm-x-session[476]: Xorg: /var/tmp/portage/x11-base/xorg-server-1.17.1-r1/work/xorg-server-1.17.1/dix/p rivates.c:385: dixRegisterPrivateKey: Assertion `!global_keys[type].created' failed. Jul 12 15:13:17 gentoo.local kernel: audit: type=1701 audit(1436695997.284:5): auid=1001 uid=1001 gid=1001 ses=1 pid=478 comm="Xorg" exe="/usr/bi n/Xorg" sig=6 Jul 12 15:13:17 gentoo.local /usr/libexec/gdm-x-session[476]: Unable to run X server Then, I downgraded to Xorg 1.16.4 and successfully started the user session, but without sound :). Here, related messages: Jul 12 14:19:15 gentoo.local pulseaudio[834]: [pulseaudio] main.c: User-configured server at {82b25778862ae282f6ff4aae0000000f}unix:/run/user/100 1/pulse/native, which appears to be local. Probing deeper. Jul 12 14:19:15 gentoo.local pulseaudio[837]: [pulseaudio] pid.c: Daemon already running. Up to date, I'm using switchable graphic system with disabled discrete ATI card and disabled radeon runtime power management. The method gives very stable graphics subsystem. At times, when I needed GPU performance, I rebooted to BIOS setup and selected only discrete card. So, I'll continue to use the method until laptop's final days. :) During 4+ years I learned that hybrid graphics support is very weak in Xorg environment (AFAIK because of architecture). Frankly, I've seen serious problems with hybrid graphics in Windows environment too on the same laptop (compatible combination of Intel/ATI driver versions required :)). Thank you for support! |
