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I'm running Fedora on a Mac Mini with a projector connected to it using a DP-to-VGA adapter. It doesn't seem to be displaying anything on the projector. When Fedora starts up, the /usr/libexec/gnome-session-check-accelerated-gl-helper process is using up 100% of CPU. gdb shows this stack trace: #0 0x00007fa7f195c8d4 in nouveau_fence_update () from /usr/lib64/dri/nouveau_dri.so #1 0x00007fa7f195cc22 in nouveau_fence_wait () from /usr/lib64/dri/nouveau_dri.so #2 0x00007fa7f1a02de0 in nv50_screen_destroy () from /usr/lib64/dri/nouveau_dri.so #3 0x00007fa7f17ddb0f in dri_destroy_screen_helper () from /usr/lib64/dri/nouveau_dri.so #4 0x00007fa7f17ddbb5 in dri_destroy_screen () from /usr/lib64/dri/nouveau_dri.so #5 0x00007fa7f17dbeff in driDestroyScreen () from /usr/lib64/dri/nouveau_dri.so #6 0x00007fa7fcfcf042 in dri2DestroyScreen () from /lib64/libGL.so.1 #7 0x00007fa7fcfa5b56 in FreeScreenConfigs.isra.3 () from /lib64/libGL.so.1 #8 0x00007fa7fcfa5bd9 in glx_display_free () from /lib64/libGL.so.1 #9 0x00007fa7fcfa5d2e in __glXCloseDisplay () from /lib64/libGL.so.1 #10 0x00007fa7fc65e972 in XCloseDisplay () from /lib64/libX11.so.6 #11 0x000056159863d6c4 in main () It never leaves the "nouveau_fence_wait" function. There are also lots of errors in the dmesg output: [ 42.646024] nouveau 0000:05:00.0: DRM: DDC responded, but no EDID for DP-1 [ 49.130444] nouveau 0000:05:00.0: DRM: DDC responded, but no EDID for DP-1 [ 50.571137] nouveau 0000:05:00.0: DRM: DDC responded, but no EDID for DP-1 [ 50.639181] nouveau 0000:05:00.0: DRM: DDC responded, but no EDID for DP-1 [ 50.706565] nouveau 0000:05:00.0: fifo: CACHE_ERROR - ch 4 [systemd-logind[670]] subc 5 mthd 0180 data beef0301 [ 50.709846] nouveau 0000:05:00.0: fifo: CACHE_ERROR - ch 4 [systemd-logind[670]] subc 5 mthd 0184 data beef0201 [ 50.712679] nouveau 0000:05:00.0: fifo: CACHE_ERROR - ch 4 [systemd-logind[670]] subc 5 mthd 0188 data beef0201 ... [ 50.778605] nouveau 0000:05:00.0: fifo: CACHE_ERROR - ch 4 [systemd-logind[670]] subc 3 mthd 01d8 data beef0201 [ 50.781415] nouveau 0000:05:00.0: fifo: CACHE_ERROR - ch 4 [systemd-logind[670]] subc 3 mthd 01dc data beef0201 [ 50.781457] nouveau 0000:05:00.0: gr: TRAP_CCACHE 00000001 [FAULT] [ 50.781463] nouveau 0000:05:00.0: gr: TRAP_CCACHE 000e0080 00000000 00000000 00000000 00000000 00000004 00000000 [ 50.781467] nouveau 0000:05:00.0: gr: 00200000 [] ch 4 [000faa4000 systemd-logind[670]] subc 3 class 8697 mthd 13bc data 00000054 [ 50.781478] nouveau 0000:05:00.0: fb: trapped read at 00202cef00 on channel 4 [0faa4000 systemd-logind[670]] engine 00 [PGRAPH] client 05 [CCACHE] subclient 00 [CB] reason 00000006 [NULL_DMAOBJ] [ 52.020035] nouveau 0000:05:00.0: gr: PGRAPH TLB flush idle timeout fail [ 52.020035] nouveau 0000:05:00.0: gr: PGRAPH_STATUS 00000403 [BUSY DISPATCH CCACHE_PREGEOM] [ 52.020035] nouveau 0000:05:00.0: gr: PGRAPH_VSTATUS0: 00000008 [CCACHE] [ 52.020035] nouveau 0000:05:00.0: gr: PGRAPH_VSTATUS1: 00000000 [] [ 52.020035] nouveau 0000:05:00.0: gr: PGRAPH_VSTATUS2: 00000000 [] [ 52.917383] nouveau 0000:05:00.0: gr: PGRAPH TLB flush idle timeout fail [ 52.917383] nouveau 0000:05:00.0: gr: PGRAPH_STATUS 00000403 [BUSY DISPATCH CCACHE_PREGEOM] [ 52.917383] nouveau 0000:05:00.0: gr: PGRAPH_VSTATUS0: 00000008 [CCACHE] [ 52.917383] nouveau 0000:05:00.0: gr: PGRAPH_VSTATUS1: 00000000 [] [ 52.917383] nouveau 0000:05:00.0: gr: PGRAPH_VSTATUS2: 00000000 [] [ 56.020303] nouveau 0000:05:00.0: gr: PGRAPH TLB flush idle timeout fail ... The kernel version is 4.8.10-300.fc25.x86_64. Gnome session version is gnome-session-3.22.2-1.fc25.x86_64.
Actually, the projector is not the problem - I get the same thing even when nothing is connected.
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Fedora 25 changed to end-of-life (EOL) status on 2017-12-12. Fedora 25 is no longer maintained, which means that it will not receive any further security or bug fix updates. As a result we are closing this bug. If you can reproduce this bug against a currently maintained version of Fedora please feel free to reopen this bug against that version. If you are unable to reopen this bug, please file a new report against the current release. If you experience problems, please add a comment to this bug. Thank you for reporting this bug and we are sorry it could not be fixed.