Comment # 18
on bug 107045
from taijian@posteo.de
(In reply to Andrey Grodzovsky from comment #17) > (In reply to taijian from comment #15) > > Created attachment 140733 [details] > > dmesg output 4.18rc5 + drm-fixes-2018-07-20 > > > > OK, so I have some new, probably interesting dmesg output with the latest > > mainline build. > > > > What's happening here is that the system boots up, then my background > > display brightness service goes to work (see here: > > https://github.com/FedeDP/Clight and here: > > https://github.com/FedeDP/Clightd) and tries to adjust screen brightness. > > This leads to a number of > > > > RIP: 0010:dm_dp_aux_transfer+0xa5/0xb0 [amdgpu] > > > > trace calls and then the system freeezes completely. And I mean completely, > > as in not even sysrq + REISUB does anything. Does this help in any way? > > So i tried with kernel 4.18 rc.1 from here - > https://cgit.freedesktop.org/~agd5f/linux/log/?h=amd-staging-drm-next > > and 2 cards > > Provider 0: id: 0x81 cap: 0x9, Source Output, Sink Offload crtcs: 5 outputs: > 3 associated providers: 1 name:AMD Radeon (TM) RX 460 Graphics @ > pci:0000:0b:00.0 > Provider 1: id: 0x49 cap: 0x6, Sink Output, Source Offload crtcs: 6 outputs: > 4 associated providers: 1 name:AMD Radeon (TM) RX 480 Graphics @ > pci:0000:08:00.0 > > Where RX 460 is the default and RX 480 is the secondary. I ran both glxgears > and glxinfo multiple time with DRI_PRIME=1 and haven't observed any issues. > > From the log I see GPU pci config reset print - where does it come from ? > Did you trigger PCI reset for the device manually or did it happen once you > tried to run any application with DRI_PRIME=1 ? Which device is 0000:01:00.0 > - primary or secondary ? Disclaimer: I'm on vacation and away from my computer right now, so going from memory. 0000:01:00.0 is probably the RX 470. And the PCI resets happen automatically when invoking an application via DRI_PRIME=1,no manual action necessary.
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