On 24 October 2017 at 02:42, Tobias Jakobi <[email protected]> wrote: > Hello Hans, > > > Hans de Goede wrote: >> Hi, >> >> On 20-10-17 19:08, [email protected] wrote: >>> On laptop systems with a dedicated (powerful) GPU A, you usually >>> have all connectors routed to another (less-powerful) GPU B. >>> >>> With my setup (GPU A = Nvidia, GPU B = Intel) I keep GPU A switched >>> off by not loading the nouveau kernel driver during boot. >>> >>> Loading nouveau while X is running then crashes the server: >>> [ 540.775] (EE) 0: /usr/bin/X (xorg_backtrace+0x41) [0x57fa31] >>> [ 540.775] (EE) 1: /usr/bin/X (0x400000+0x183429) [0x583429] >>> [ 540.775] (EE) 2: /lib64/libpthread.so.0 (0x7ff02d508000+0x10ec0) >>> [0x7ff02d518ec0] >>> [ 540.775] (EE) 3: /lib64/libc.so.6 (gsignal+0x38) [0x7ff02d1a2178] >>> [ 540.775] (EE) 4: /lib64/libc.so.6 (abort+0x16a) [0x7ff02d1a35fa] >>> [ 540.775] (EE) 5: /lib64/libc.so.6 (0x7ff02d16f000+0x2c0b7) >>> [0x7ff02d19b0b7] >>> [ 540.775] (EE) 6: /lib64/libc.so.6 (0x7ff02d16f000+0x2c162) >>> [0x7ff02d19b162] >>> [ 540.775] (EE) 7: /usr/bin/X (dixRegisterPrivateKey+0x247) [0x452197] >>> [ 540.775] (EE) 8: /usr/lib64/xorg/modules/libglamoregl.so >>> (glamor_init+0x160) [0x7ff00ee564d0] >>> [ 540.775] (EE) 9: /usr/lib64/xorg/modules/drivers/modesetting_drv.so >>> (0x7ff01c19a000+0x83e1) [0x7ff01c1a23e1] >>> [ 540.775] (EE) 10: /usr/bin/X (AddGPUScreen+0xf3) [0x4348b3] >>> [ 540.775] (EE) 11: /usr/bin/X (0x400000+0x90271) [0x490271] >>> [ 540.775] (EE) 12: /usr/bin/X (0x400000+0x9547b) [0x49547b] >>> [ 540.775] (EE) 13: /usr/bin/X (0x400000+0x905d7) [0x4905d7] >>> [ 540.775] (EE) 14: /usr/bin/X (xf86VTEnter+0x1bb) [0x47399b] >>> [ 540.775] (EE) 15: /usr/bin/X (WakeupHandler+0xda) [0x438e3a] >>> [ 540.775] (EE) 16: /usr/bin/X (WaitForSomething+0x1ce) [0x57d6fe] >>> [ 540.775] (EE) 17: /usr/bin/X (0x400000+0x34221) [0x434221] >>> [ 540.775] (EE) 18: /usr/bin/X (0x400000+0x382f8) [0x4382f8] >>> [ 540.775] (EE) 19: /lib64/libc.so.6 (__libc_start_main+0xf0) >>> [0x7ff02d18f670] >>> [ 540.776] (EE) 20: /usr/bin/X (_start+0x29) [0x4235b9] >>> >>> In particular note that GLAMOR is initialized for GPU A, which >>> makes no sense since it has no connectors. >>> >>> Fix this by bailing out early in the modesetting DDX when a setup >>> with zero connectors is detected. >>> >>> Signed-off-by: Tobias Jakobi <[email protected]> >> >> Sorry, but NACK. The modesetting driver actually had such a check before >> and I removed it because not having a driver breaks rendering on >> the dedicated GPU with "DRI_PRIME=1" for dri2 clients. > sorry, I didn't consider DRI2 in this scenario. > > >> I guess that there is some sort of assumption in the code for dealing >> with glamor failure that it only happens on coldplug, if you really >> want to be able to modprobe nouveau later you should figure out what >> is exactly going wrong and fix that. > OK, I'll try to get to the bottom of this. > > >> Note BTW that nouveau should runtime suspend the GPU, even with Xorg >> running and there really is no need to not load nouveau. > No, sadly this is not true on my system. The system has a dual cooling > solution, > where cooler A is attached to the CPU, and cooler B to the GPU. When never > inserting nouveau.ko after boot, cooler B stays off the entire time. Once I've > inserted the module, cooler B comes up from time to time _even_ if the GPU is > runtime suspended at that time (and has been since hours).
That seems strange, is the gpu powered down correctly? It might be nouveau/acpi/pm isn't actually shutting it down. Dave. _______________________________________________ [email protected]: X.Org development Archives: http://lists.x.org/archives/xorg-devel Info: https://lists.x.org/mailman/listinfo/xorg-devel
