Description of problem:
I have two displays attached. One HDMI, one display port. I'm using nouveau. Sometimes it happens that the display port monitor does not wake up after that the screens were locked.
When I go to display settings, the screen is indeed marked as turned off. When I select it as the primary display, the screen wakes up.
I have this behavior only seen with Xorg, not on Wayland.
Graphics: Card: NVIDIA GP107 [GeForce GTX 1050 Ti]
Display Server: X.org 1.19.3 drivers: modesetting,fbdev,vesa
Resolution: firstname.lastname@example.org, email@example.com
OpenGL: renderer: Gallium 0.4 on NV137 version: 4.2 Mesa 17.1.7
Today this happened again. I found this in the log:
sep 09 10:16:18 nyx kernel: Code: 39 75 c9 e0 5b 41 5c 5d c3 48 89 f9 31 f6 48 c7 c2 68 ed 62 c0 48 c7 c7 48 97 63 c0 e8 4c 85 f0 ff 8b 83 20 04 00 00 85 c0 7e c0 <0f> ff eb bc 0f 1f 40 00 6
sep 09 10:16:18 nyx kernel: ret_from_fork+0x25/0x30
sep 09 10:16:18 nyx kernel: ? do_syscall_64+0x67/0x140
sep 09 10:16:18 nyx kernel: ? kthread_park+0x60/0x60
sep 09 10:16:18 nyx kernel: ? process_one_work+0x3c0/0x3c0
sep 09 10:16:18 nyx kernel: kthread+0x125/0x140
sep 09 10:16:18 nyx kernel: worker_thread+0x4a/0x3a0
sep 09 10:16:18 nyx kernel: process_one_work+0x193/0x3c0
sep 09 10:16:18 nyx kernel: ttm_bo_delayed_workqueue+0x1b/0x40 [ttm]
sep 09 10:16:18 nyx kernel: ttm_bo_delayed_delete+0x130/0x1c0 [ttm]
sep 09 10:16:18 nyx kernel: ? ttm_bo_cleanup_refs_and_unlock+0xae/0x170 [ttm]
sep 09 10:16:18 nyx kernel: ttm_bo_release_list+0xc3/0x1a0 [ttm]
sep 09 10:16:18 nyx kernel: Call Trace:
sep 09 10:16:18 nyx kernel: CR2: 00007fae900b2008 CR3: 00000006f6d89000 CR4: 00000000003406e0
sep 09 10:16:18 nyx kernel: CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
sep 09 10:16:18 nyx kernel: FS: 0000000000000000(0000) GS:ffff907abe840000(0000) knlGS:0000000000000000
sep 09 10:16:18 nyx kernel: R13: 0000000000045880 R14: ffff907ab24d91e0 R15: ffff907a9d0f8840
sep 09 10:16:18 nyx kernel: R10: ffffa45e08677d98 R11: 0000000000000000 R12: ffff907ab3c8c800
sep 09 10:16:18 nyx kernel: RBP: ffffa45e08677db0 R08: ffff907a9d0f8840 R09: 000000018040003d
sep 09 10:16:18 nyx kernel: RDX: 000000018040003e RSI: ffffe8001f743e00 RDI: ffff907ab6b5b800
sep 09 10:16:18 nyx kernel: RAX: 0000000000000001 RBX: ffff907ab6b5b800 RCX: 000000018040003d
sep 09 10:16:18 nyx kernel: RSP: 0018:ffffa45e08677da0 EFLAGS: 00010202
sep 09 10:16:18 nyx kernel: RIP: 0010:nouveau_bo_del_ttm+0x6e/0x80 [nouveau]
sep 09 10:16:18 nyx kernel: task: ffff907ab8d04b80 task.stack: ffffa45e08674000
sep 09 10:16:18 nyx kernel: Workqueue: events ttm_bo_delayed_workqueue [ttm]
sep 09 10:16:18 nyx kernel: Hardware name: Micro-Star International Co., Ltd MS-7A34/B350 PC MATE (MS-7A34), BIOS A.60 07/27/2017
sep 09 10:16:18 nyx kernel: CPU: 9 PID: 1663 Comm: kworker/9:2 Not tainted 4.12.9-300.fc26.x86_64 #1
sep 09 10:16:18 nyx kernel: parport shpchp acpi_cpufreq tpm_tis tpm_tis_core tpm binfmt_misc dm_crypt nouveau video mxm_wmi i2c_algo_bit drm_kms_helper ttm crct10dif_pclmul crc32_pclmul r81
sep 09 10:16:18 nyx kernel: Modules linked in: fuse xt_CHECKSUM ipt_MASQUERADE nf_nat_masquerade_ipv4 tun nf_conntrack_netbios_ns nf_conntrack_broadcast xt_CT ip6t_rpfilter ip6t_REJECT nf_re
sep 09 10:16:18 nyx kernel: WARNING: CPU: 9 PID: 1663 at drivers/gpu/drm/nouveau/nouveau_bo.c:137 nouveau_bo_del_ttm+0x6e/0x80 [nouveau]
(Interestingly enough ABRT was not able to create a Bugzilla issue from this, but that's another issue)
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