Created attachment 58132 [details] display-related file in /etc/X11/xorg.conf.d/ that sets up the multi-head After hitting #47064 I decided to play with my nvidia card and the radeon IGP I have in my new system. So I set xorg configuration up so that I have a desktop spanning both cards and when I ask glxinfo for both displays I get the same answer... I would expect one to be radeon and the other nouveau not both nouveau... I don't know if it is a bug in X in glxinfo or in mesa, if I can be of any help to find out tell me.
Created attachment 58133 [details] output of DISPLAY=:0.0 glxinfo
Created attachment 58134 [details] output of DISPLAY=:0.1 glxinfo
Please attach your xorg log.
And dmesg output.
Created attachment 58137 [details] dmesg after xorg start (fresh reboot)
Created attachment 58138 [details] Xorg log after start
Created attachment 58140 [details] glxinfo when only the radeon card is present glxinfo output after unplugging the nvidia card, not even changing the Xorg configuration.
Created attachment 58142 [details] Xorg log when only the radeon is present Xorg log after unplugging the nvidia card, not changing the xorg configuration.
Ah I just found out that changing the screen number on the configuration changes the output of glxinfo. So if I have Screen 0 "screen-nv" Screen 1 "screen-ra" LeftOf "screen-nv" glxinfo gives me "nouveau" for both screens. But if I have Screen 1 "screen-nv" Screen 0 "screen-ra" LeftOf "screen-nv" glxinfo gives me "Gallium 0.4 on AMD SUMO" for both screens.
First report was with mesa-7.11 but after an update to 8.0.1 I get the same thing.
What's the output of glxinfo if you set DISPLAY=":0"? Does it list both screens one after the other? Also, please try "glxinfo -b" with DISPLAY=":0.0" and ":0.1". Otherwise, I think the bug might be in glxinfo itself. Here's the code to loop over the screens: numScreens = ScreenCount(dpy); print_display_info(dpy); for (scrnum = 0; scrnum < numScreens; scrnum++) { For display=":0.1" I have a feeling that numScreens = 1 and scrnum is always zero so we're only querying the 0th screen. I'll attach a patch to glxinfo for you to try.
Created attachment 58147 [details] [review] try to fix screen indexing in glxinfo Can you try applying this patch to glxinfo and see if it helps? glxinfo is in the Mesa demos repository in src/xdemos/glxinfo.c
Ok, So when I start "DISPLAY=:0 glxinfo" I get both screens first the nouveau screen (0) then the radeon one (1). when I start "DISPLAY=:0.0 glxinfo -b" I get "33" when I start "DISPLAY=:0.1 glxinfo -b" I get "33" with the patch applied when I do "DISPLAY=:0.0 glxinfo" I get both screens listed (correctly just as before when I used DISPLAY=:0). In fact it is nearly the same output as "DISPLAY=:0 glxinfo" except for the first line where after "name of display" it shows ":0" or ":0.0" Was it intended ? (personnally if I ask for one specific screen I don't care about the other ones... but it is true that when starting glxinfo without changing DISPLAY variable it gets as default value the current screen I you can't tell if there are others, so I guess it is ok this way)
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