https://bugzilla.kernel.org/show_bug.cgi?id=85791

Bug ID: 85791 Summary: nouveau: errors on boot, can't use discrete gpu Product: Drivers Version: 2.5 Kernel Version: 3.16.4, 3.14.20 Hardware: All OS: Linux Tree: Mainline Status: NEW Severity: normal Priority: P1 Component: Video(DRI - non Intel) Assignee: drivers_video-dri@kernel-bugs.osdl.org Reporter: mezin.alexander@gmail.com Regression: No

Created attachment 152791 --> https://bugzilla.kernel.org/attachment.cgi?id=152791&action=edit dmesg

On boot I see these errors:

[ 18.929898] nouveau E[ PBUS][0000:01:00.0] MMIO write of 0x00000002 FAULT at 0x4188ac [ IBUS ] [ 18.931250] nouveau E[ DRM] Pointer to TMDS table invalid [ 18.932395] nouveau E[ DRM] Pointer to flat panel table invalid [ 22.798349] nouveau E[ PGRAPH][0000:01:00.0] HUB_INIT timed out [ 22.798360] nouveau E[ PGRAPH][0000:01:00.0] 409000 - done 0x00000220 [ 22.798373] nouveau E[ PGRAPH][0000:01:00.0] 409000 - stat 0x00000000 0x00000000 0x00000000 0x00000000 [ 22.798384] nouveau E[ PGRAPH][0000:01:00.0] 409000 - stat 0x00000000 0x00000000 0x00000006 0x00000001 [ 22.798389] nouveau E[ PGRAPH][0000:01:00.0] 502000 - done 0x00000300 [ 22.798397] nouveau E[ PGRAPH][0000:01:00.0] 502000 - stat 0x00000000 0x00008c00 0x00000000 0x00000000 [ 22.798404] nouveau E[ PGRAPH][0000:01:00.0] 502000 - stat 0x00000000 0x00000000 0x00000000 0x00000000 [ 22.798406] nouveau E[ PGRAPH][0000:01:00.0] init failed, -16

Full dmesg is attached.

When I try to use discrete gpu with DRI_PRIME=1 (after xrandr --setprovideroffloadsink), X crashes.

Hardware: 00:02.0 VGA compatible controller: Intel Corporation Haswell-ULT Integrated Graphics Controller (rev 09) 01:00.0 3D controller: NVIDIA Corporation GK107M [GeForce GT 750M] (rev a1)

Acer Aspire V5-573G

If I remember correctly, some time ago everything worked.