On Fri, Feb 05, 2016 at 11:24:12AM +0900, Michel Dänzer wrote: > On 04.02.2016 19:05, Lennert Van Alboom wrote: > > Hello. I've got a HP Elitebook 850g1 with hybrid graphics: > > > > $ lspci | grep VGA > > 00:02.0 VGA compatible controller: Intel Corporation Haswell-ULT > > Integrated Graphics Controller (rev 0b) > > 03:00.0 VGA compatible controller: Advanced Micro Devices, Inc. > > [AMD/ATI] Mars [Radeon HD 8730M] (rev ff) > > > > $ sudo cat /sys/kernel/debug/vgaswitcheroo/switch > > 0:IGD:+:Pwr:0000:00:02.0 > > 1:DIS-Audio: :Off:0000:03:00.1 > > 2:DIS: :DynOff:0000:03:00.0 > > > > I'm running Debian (sid, x86_64) with kernel 4.4.0-trunk-amd64 (same > > happens with the 4.3.0-1-amd64 kernel) and Xorg 1:7.7+13 (1.18.0). > > I'm having an odd issue where Xorg loads the correct "radeon" driver, but > > after a split second, unloads it again and loads "modesetting": > > > > [ 13.688] (II) config/udev: removing GPU device > > /sys/devices/pci0000:00/0000:00:1c.4/0000:03:00.0/drm/card1 /dev/dri/card1 > > [ 13.688] xf86: remove device 1 > > /sys/devices/pci0000:00/0000:00:1c.4/0000:03:00.0/drm/card1 > > [ 13.693] (II) UnloadModule: "radeon" > > [ 13.693] (II) UnloadSubModule: "fb" > > [ 13.693] (II) Unloading fb > > [ 13.693] (II) UnloadSubModule: "glamoregl" > > [ 13.693] (II) Unloading glamoregl > > [ 13.693] (II) config/udev: Adding drm device (/dev/dri/card1) > > [ 13.693] (II) xfree86: Adding drm device (/dev/dri/card1) > > [ 13.693] (II) LoadModule: "modesetting" > > [ 13.693] (II) Loading > > /usr/lib/xorg/modules/drivers/modesetting_drv.so > > > > Full Xorg log at http://ziff.soleus.nu/Xorg.0.log.txt. I don't have a > > xorg.conf, and no snippets in xorg.conf.d either. > > > > This results in two providers in xrandr, Intel and modesetting (as opposed > > to radeon, as I had before): > > > > $ xrandr --listproviders > > Providers: number : 2 > > Provider 0: id: 0x7d cap: 0xb, Source Output, Sink Output, Sink Offload > > crtcs: 4 outputs: 6 associated providers: 0 name:Intel > > Provider 1: id: 0x140 cap: 0x3, Source Output, Sink Output crtcs: 2 > > outputs: 2 associated providers: 0 name:modesetting > > > > I can't set an offload sink: > > > > $ xrandr --setprovideroffloadsink modesetting Intel > > X Error of failed request: BadValue (integer parameter out of range > > for operation) > > Major opcode of failed request: 140 (RANDR) > > Minor opcode of failed request: 34 (RRSetProviderOffloadSink) > > Value in failed request: 0x140 > > Serial number of failed request: 16 > > Current serial number in output stream: 17 > > > > And, I suppose this is normal because of the above, DRI_PRIME doesn't do > > much: > > > > $ glxinfo | grep "OpenGL renderer" > > OpenGL renderer string: Mesa DRI Intel(R) Haswell Mobile > > $ DRI_PRIME=1 glxinfo | grep "OpenGL renderer" > > OpenGL renderer string: Mesa DRI Intel(R) Haswell Mobile > > > > Strangely enough, the /sys device link for "card1", as mentioned in the > > Xorg log, still points to the "correct" ATI device: > > > > $ ls -l /sys/class/drm/card1/device > > lrwxrwxrwx 1 root root 0 Feb 3 21:14 /sys/class/drm/card1/device -> > > ../../../0000:03:00.0 > > > > > > I'm a bit stumped here. How can I get my radeon device back in the xrandr > > providers and working via DRI_PRIME? > > I can see two problems here: Xorg unloads the radeon driver and loads > the modesetting driver instead, and the modesetting driver doesn't > advertise PRIME render offloading capability. I don't think either is a > radeon driver issue though, so the xorg-devel list seems more > appropriate. Moving there. > > > -- > Earthling Michel Dänzer | http://www.amd.com > Libre software enthusiast | Mesa and X developer
Okay. The second problem isn't much of a problem (for me, personally) if the first gets resolved, so I suppose it makes sense to look at that first. Why would Xorg unload a valid driver for a card and load another instead? And, more to the point, is there a way of preventing it from happening? Lennert
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