https://bugs.freedesktop.org/show_bug.cgi?id=67550
Priority: medium Bug ID: 67550 Assignee: dri-devel@lists.freedesktop.org Summary: Radeon+Intel GPU with HDMI audio on Intel Severity: normal Classification: Unclassified OS: Linux (All) Reporter: a.heider@gmail.com Hardware: x86-64 (AMD64) Status: NEW Version: DRI CVS Component: General Product: DRI
I have multiple, but related, issues with a dual GPU setup: 1) cursor flickering 2) no HDMI audio on secondary GPU without extending X11 for that output 3) xrandr broken with xorg.conf describing the dual setup 4) driQueryOptioni() not multi GPU aware (crash in mesa)
Setup: Radeon 6850 PCIe as primary device, connected to a TFT over DVI HD4000 on Ivybridge as secondary device, connected to a receiver over HDMI (plus a projector connected to my receiver via HDMI) Pretty much the latest and greatest of everything in the graphics stack.
Why the secondary connection? It's used to get multichannel audio to my receiver, which isn't possible with the additional radeon HDMI head.
If I extend my desktop via: xrandr --output $intel_hdmi --right-of $radeon_dvi --mode 1280x720 --refresh 60 It properly extends the display to the secondary GPU. I get a picture on the projector, as well as HDMI audio on the receiver.
#1, without xorg.conf Now with both outputs enabled there is a mouse cursor issue with apps on the primary output:
* mplayer (without using vdpau), dvb-t viewer or firefox+flash: when moving the cursor over the video output, there's a rectangle of garbage around the cursor. Looks like a rect of a prior frame on a broken alpha mask. The issue with mplayer vanishes when using vdpau. * The cursor in full screen GL games flickers. One frame it's there, then vanishes some later, but mostly its gone, making GUIs a real pita.
If I disable the $intel_hdmi output again the problem goes away. But that brings us to the second problem:
#2, without xorg.conf The receiver sends its own EDID block, so I can extend via xrandr without turning on the projector. But the projector is turned off in most cases, so is there a way to disable a display output but keep the HDMI audio output? (as a workaround for #1)
I found: xrandr --output $intel_hdmi --set audio force-dvi|off|auto|on but it seems that only works if the display output is enabled (or I'm too stupid to properly use xrandr)...
#3 with xorg.conf xrandr thinks HDMI isn't connected to the Intel GPU, and hence doesn't allow to toggle it, yet HDMI audio over it just works. While that would probably work around #1 I cannot tell because then I run into:
#4 with xorg.conf All GL apps crash with: glxinfo: /home/andre/devel/mesa/src/mesa/drivers/dri/common/xmlconfig.c:1030: driQueryOptioni: Assertion `cache->info[i].name != ((void *)0)' failed.