More slightly different kernel log (journalctl --reverse)

Oct 12 11:35:05 phoenix kernel: nouveau E[   PFIFO][0000:01:00.0] channel 11 [konsole[1973]] unload timeout
Oct 12 11:35:03 phoenix kernel: nouveau E[  PGRAPH][0000:01:00.0] PGRAPH_VSTATUS2: 0x00000000
Oct 12 11:35:03 phoenix kernel: nouveau E[  PGRAPH][0000:01:00.0] PGRAPH_VSTATUS1: 0x00000000
Oct 12 11:35:03 phoenix kernel: nouveau E[  PGRAPH][0000:01:00.0] PGRAPH_VSTATUS0: 0x00000008 CCACHE
Oct 12 11:35:03 phoenix kernel: nouveau E[  PGRAPH][0000:01:00.0] PGRAPH_STATUS  : 0x00000403 BUSY DISPATCH CCACHE_PREGEOM
Oct 12 11:35:03 phoenix kernel: nouveau E[  PGRAPH][0000:01:00.0] PGRAPH TLB flush idle timeout fail
Oct 12 11:35:01 phoenix kernel: nouveau E[  PGRAPH][0000:01:00.0] PGRAPH_VSTATUS2: 0x00000000
Oct 12 11:35:01 phoenix kernel: nouveau E[  PGRAPH][0000:01:00.0] PGRAPH_VSTATUS1: 0x00000000
Oct 12 11:35:01 phoenix kernel: nouveau E[  PGRAPH][0000:01:00.0] PGRAPH_VSTATUS0: 0x00000008 CCACHE
Oct 12 11:35:01 phoenix kernel: nouveau E[  PGRAPH][0000:01:00.0] PGRAPH_STATUS  : 0x00000403 BUSY DISPATCH CCACHE_PREGEOM
Oct 12 11:35:01 phoenix kernel: nouveau E[  PGRAPH][0000:01:00.0] PGRAPH TLB flush idle timeout fail
Oct 12 11:34:59 phoenix kernel: nouveau E[  PGRAPH][0000:01:00.0] PGRAPH_VSTATUS2: 0x00000000
Oct 12 11:34:59 phoenix kernel: nouveau E[  PGRAPH][0000:01:00.0] PGRAPH_VSTATUS1: 0x00000000
Oct 12 11:34:59 phoenix kernel: nouveau E[  PGRAPH][0000:01:00.0] PGRAPH_VSTATUS0: 0x00000008 CCACHE
Oct 12 11:34:59 phoenix kernel: nouveau E[  PGRAPH][0000:01:00.0] PGRAPH_STATUS  : 0x00000403 BUSY DISPATCH CCACHE_PREGEOM
Oct 12 11:34:59 phoenix kernel: nouveau E[  PGRAPH][0000:01:00.0] PGRAPH TLB flush idle timeout fail
Oct 12 11:34:57 phoenix kernel: nouveau E[  PGRAPH][0000:01:00.0] PGRAPH_VSTATUS2: 0x00000000
Oct 12 11:34:57 phoenix kernel: nouveau E[  PGRAPH][0000:01:00.0] PGRAPH_VSTATUS1: 0x00000000
Oct 12 11:34:57 phoenix kernel: nouveau E[  PGRAPH][0000:01:00.0] PGRAPH_VSTATUS0: 0x00000008 CCACHE
Oct 12 11:34:57 phoenix kernel: nouveau E[  PGRAPH][0000:01:00.0] PGRAPH_STATUS  : 0x00000403 BUSY DISPATCH CCACHE_PREGEOM
Oct 12 11:34:57 phoenix kernel: nouveau E[  PGRAPH][0000:01:00.0] PGRAPH TLB flush idle timeout fail
Oct 12 11:34:57 phoenix kernel: nouveau E[konsole[1973]] failed to idle channel 0xcccc0000 [konsole[1973]]
Oct 12 11:34:40 phoenix kernel: nouveau E[  PGRAPH][0000:01:00.0] PGRAPH_VSTATUS2: 0x00000000
Oct 12 11:34:40 phoenix kernel: nouveau E[  PGRAPH][0000:01:00.0] PGRAPH_VSTATUS1: 0x00000000
Oct 12 11:34:40 phoenix kernel: nouveau E[  PGRAPH][0000:01:00.0] PGRAPH_VSTATUS0: 0x00000008 CCACHE
Oct 12 11:34:40 phoenix kernel: nouveau E[  PGRAPH][0000:01:00.0] PGRAPH_STATUS  : 0x00000403 BUSY DISPATCH CCACHE_PREGEOM
Oct 12 11:34:40 phoenix kernel: nouveau E[  PGRAPH][0000:01:00.0] PGRAPH TLB flush idle timeout fail
Oct 12 11:34:40 phoenix kernel: nouveau E[konsole[1973]] failed to idle channel 0xcccc0000 [konsole[1973]]
Oct 12 11:34:23 phoenix kernel: nouveau E[     PFB][0000:01:00.0] trapped write at 0x0100bdc0c8 on channel 0x0007fed0 [unknown] B
Oct 12 11:34:23 phoenix kernel: nouveau E[     PFB][0000:01:00.0] trapped write at 0x0100bdc000 on channel 0x0007fed0 [unknown] B
Oct 12 11:34:23 phoenix kernel: nouveau E[     PFB][0000:01:00.0] trapped write at 0x0100a6fe0c on channel 0x0007fed0 [unknown] B
Oct 12 11:34:23 phoenix kernel: nouveau E[     PFB][0000:01:00.0] trapped write at 0x0100a6fcb8 on channel 0x0007fed0 [unknown] B
Oct 12 11:34:23 phoenix kernel: nouveau E[     PFB][0000:01:00.0] trapped write at 0x0100a6fa3c on channel 0x0007fed0 [unknown] B
Oct 12 11:34:23 phoenix kernel: nouveau E[     PFB][0000:01:00.0] trapped write at 0x0100a6f8b8 on channel 0x0007fed0 [unknown] B
Oct 12 11:34:23 phoenix kernel: nouveau E[     PFB][0000:01:00.0] trapped write at 0x0100a6f638 on channel 0x0007fed0 [unknown] B
Oct 12 11:34:23 phoenix kernel: nouveau E[     PFB][0000:01:00.0] trapped write at 0x0100a6f4b8 on channel 0x0007fed0 [unknown] B
Oct 12 11:34:23 phoenix kernel: nouveau E[     PFB][0000:01:00.0] trapped write at 0x0100a6f268 on channel 0x0007fed0 [unknown] B
Oct 12 11:34:23 phoenix kernel: nouveau E[     PFB][0000:01:00.0] trapped write at 0x0100a6f0b8 on channel 0x0007fed0 [unknown] B
Oct 12 11:34:23 phoenix kernel: nouveau E[     PFB][0000:01:00.0] trapped write at 0x0100a6f000 on channel 0x0007fed0 [unknown] B
Oct 12 11:34:23 phoenix kernel: nouveau E[     PFB][0000:01:00.0] trapped write at 0x0100b6f020 on channel 0x0007fed0 [unknown] B
Oct 12 11:34:23 phoenix kernel: nouveau E[   PFIFO][0000:01:00.0] channel 8 [konsole[1987]] unload timeout
Oct 12 11:34:21 phoenix kernel: nouveau E[  PGRAPH][0000:01:00.0] PGRAPH_VSTATUS2: 0x00000000
Oct 12 11:34:21 phoenix kernel: nouveau E[  PGRAPH][0000:01:00.0] PGRAPH_VSTATUS1: 0x00000000
Oct 12 11:34:21 phoenix kernel: nouveau E[  PGRAPH][0000:01:00.0] PGRAPH_VSTATUS0: 0x00000008 CCACHE
Oct 12 11:34:21 phoenix kernel: nouveau E[  PGRAPH][0000:01:00.0] PGRAPH_STATUS  : 0x00000403 BUSY DISPATCH CCACHE_PREGEOM
Oct 12 11:34:21 phoenix kernel: nouveau E[  PGRAPH][0000:01:00.0] PGRAPH TLB flush idle timeout fail
Oct 12 11:34:19 phoenix kernel: nouveau E[     PFB][0000:01:00.0] trapped write at 0x0100a6f090 on channel 0x0007fed0 [unknown] B
Oct 12 11:34:19 phoenix kernel: nouveau E[  PGRAPH][0000:01:00.0] PGRAPH_VSTATUS2: 0x00000000
Oct 12 11:34:19 phoenix kernel: nouveau E[  PGRAPH][0000:01:00.0] PGRAPH_VSTATUS1: 0x00000000
Oct 12 11:34:19 phoenix kernel: nouveau E[  PGRAPH][0000:01:00.0] PGRAPH_VSTATUS0: 0x00000008 CCACHE
Oct 12 11:34:19 phoenix kernel: nouveau E[  PGRAPH][0000:01:00.0] PGRAPH_STATUS  : 0x00000403 BUSY DISPATCH CCACHE_PREGEOM
Oct 12 11:34:19 phoenix kernel: nouveau E[  PGRAPH][0000:01:00.0] PGRAPH TLB flush idle timeout fail
Oct 12 11:34:17 phoenix kernel: nouveau E[     PFB][0000:01:00.0] trapped write at 0x0100a6f098 on channel 0x0007fed0 [unknown] B
Oct 12 11:34:17 phoenix kernel: nouveau E[  PGRAPH][0000:01:00.0] PGRAPH_VSTATUS2: 0x00000000
Oct 12 11:34:17 phoenix kernel: nouveau E[  PGRAPH][0000:01:00.0] PGRAPH_VSTATUS1: 0x00000000
Oct 12 11:34:17 phoenix kernel: nouveau E[  PGRAPH][0000:01:00.0] PGRAPH_VSTATUS0: 0x00000008 CCACHE
Oct 12 11:34:17 phoenix kernel: nouveau E[  PGRAPH][0000:01:00.0] PGRAPH_STATUS  : 0x00000403 BUSY DISPATCH CCACHE_PREGEOM
Oct 12 11:34:17 phoenix kernel: nouveau E[  PGRAPH][0000:01:00.0] PGRAPH TLB flush idle timeout fail
Oct 12 11:34:15 phoenix kernel: nouveau E[     PFB][0000:01:00.0] trapped write at 0x0100a6f0a8 on channel 0x0007fed0 [unknown] B
Oct 12 11:34:15 phoenix kernel: nouveau E[  PGRAPH][0000:01:00.0] PGRAPH_VSTATUS2: 0x00000000
Oct 12 11:34:15 phoenix kernel: nouveau E[  PGRAPH][0000:01:00.0] PGRAPH_VSTATUS1: 0x00000000
Oct 12 11:34:15 phoenix kernel: nouveau E[  PGRAPH][0000:01:00.0] PGRAPH_VSTATUS0: 0x00000008 CCACHE
Oct 12 11:34:15 phoenix kernel: nouveau E[  PGRAPH][0000:01:00.0] PGRAPH_STATUS  : 0x00000403 BUSY DISPATCH CCACHE_PREGEOM
Oct 12 11:34:15 phoenix kernel: nouveau E[  PGRAPH][0000:01:00.0] PGRAPH TLB flush idle timeout fail