[Bug 107213] [amdgpu/DisplayPort] KDE Wayland session is segfaulting right after login

Wed Sep 5 12:52:16 UTC 2018

https://bugs.freedesktop.org/show_bug.cgi?id=107213

--- Comment #13 from Shmerl <shtetldik at gmail.com> ---
I have a recent kernel and userland stack with Debian testing, it's still
crashing and falling back into sddm. But with newest kernel I don't see the
segfault message in dmesg anymore.

Linux 4.19.0-rc2-amd64 #1 SMP Debian 4.19~rc2-1~exp1 (2018-09-03) x86_64
GNU/Linux

firmware-amd-graphics: 20180825+dfsg-1

I see this in dmesg:

[   21.111724] [drm:generic_reg_wait [amdgpu]] *ERROR* REG_WAIT timeout 10us *
3000 tries - dce110_stream_encoder_dp_blank line:922
[   21.111795] WARNING: CPU: 6 PID: 153 at
drivers/gpu/drm/amd/amdgpu/../display/dc/dc_helper.c:254
generic_reg_wait+0xe7/0x160 [amdgpu]
[   21.111796] Modules linked in: devlink(E) ebtable_filter(E) ebtables(E)
ip6table_filter(E) ip6_tables(E) iptable_filter(E) cmac(E) bnep(E) nls_ascii(E)
nls_cp437(E) vfat(E) fat(E) arc4(E) amdkfd(E) snd_hda_codec_realtek(E)
snd_hda_codec_generic(E) uvcvideo(E) edac_mce_amd(E) btusb(E)
snd_hda_codec_hdmi(E) btrtl(E) mxm_wmi(E) wmi_bmof(E) videobuf2_vmalloc(E)
btbcm(E) btintel(E) amdgpu(E) kvm_amd(E) videobuf2_memops(E) iwlmvm(E)
bluetooth(E) snd_hda_intel(E) chash(E) videobuf2_v4l2(E) kvm(E) irqbypass(E)
snd_usb_audio(E) gpu_sched(E) snd_hda_codec(E) mac80211(E) snd_usbmidi_lib(E)
videobuf2_common(E) snd_hda_core(E) crct10dif_pclmul(E) jitterentropy_rng(E)
crc32_pclmul(E) ttm(E) snd_rawmidi(E) snd_seq_device(E) snd_hwdep(E)
efi_pstore(E) videodev(E) evdev(E) drm_kms_helper(E) ghash_clmulni_intel(E)
[   21.111824]  snd_pcm(E) iwlwifi(E) pcspkr(E) drbg(E) efivars(E) media(E)
drm(E) ansi_cprng(E) snd_timer(E) cfg80211(E) ecdh_generic(E) snd(E)
soundcore(E) rfkill(E) sp5100_tco(E) crc16(E) k10temp(E) ccp(E) rng_core(E)
sg(E) wmi(E) pcc_cpufreq(E) button(E) acpi_cpufreq(E) nct6775(E) hwmon_vid(E)
parport_pc(E) ppdev(E) lp(E) parport(E) efivarfs(E) ip_tables(E) x_tables(E)
autofs4(E) xfs(E) btrfs(E) xor(E) zstd_decompress(E) zstd_compress(E) xxhash(E)
raid6_pq(E) libcrc32c(E) crc32c_generic(E) hid_generic(E) usbhid(E) hid(E)
sd_mod(E) crc32c_intel(E) ahci(E) xhci_pci(E) aesni_intel(E) aes_x86_64(E)
libahci(E) crypto_simd(E) xhci_hcd(E) igb(E) cryptd(E) glue_helper(E) libata(E)
i2c_piix4(E) nvme(E) i2c_algo_bit(E) dca(E) usbcore(E) scsi_mod(E)
usb_common(E) nvme_core(E) gpio_amdpt(E) gpio_generic(E)
[   21.111860] CPU: 6 PID: 153 Comm: kworker/6:3 Tainted: G            E    
4.19.0-rc2-amd64 #1 Debian 4.19~rc2-1~exp1
[   21.111861] Hardware name: To Be Filled By O.E.M. To Be Filled By
O.E.M./X370 Taichi, BIOS L4.64 04/03/2018
[   21.111877] Workqueue: events drm_mode_rmfb_work_fn [drm]
[   21.111931] RIP: 0010:generic_reg_wait+0xe7/0x160 [amdgpu]
[   21.111932] Code: 44 24 58 8b 54 24 48 89 de 44 89 4c 24 08 48 8b 4c 24 50
48 c7 c7 20 dd 1e c2 e8 64 76 ab fe 83 7d 18 01 44 8b 4c 24 08 74 02 <0f> 0b 48
83 c4 10 44 89 c8 5b 5d 41 5c 41 5d 41 5e 41 5f c3 41 0f
[   21.111933] RSP: 0018:ffffaf830207fa20 EFLAGS: 00010297
[   21.111935] RAX: 0000000000000000 RBX: 000000000000000a RCX:
0000000000000000
[   21.111936] RDX: 0000000000000000 RSI: ffff96dcceb966a8 RDI:
ffff96dcceb966a8
[   21.111937] RBP: ffff96dcc61f1700 R08: 0000000000000005 R09:
0000000000010200
[   21.111938] R10: 0000000000000498 R11: ffffffff9a1dc6ed R12:
0000000000000bb9
[   21.111938] R13: 00000000000051e2 R14: 0000000000010000 R15:
0000000000000000
[   21.111940] FS:  0000000000000000(0000) GS:ffff96dcceb80000(0000)
knlGS:0000000000000000
[   21.111941] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   21.111942] CR2: 000055ab41a08358 CR3: 00000003f4b52000 CR4:
00000000003406e0
[   21.111943] Call Trace:
[   21.112005]  dce110_stream_encoder_dp_blank+0x12c/0x1a0 [amdgpu]
[   21.112061]  core_link_disable_stream+0x54/0x220 [amdgpu]
[   21.112116]  dce110_reset_hw_ctx_wrap+0xc1/0x1e0 [amdgpu]
[   21.112170]  dce110_apply_ctx_to_hw+0x45/0x650 [amdgpu]
[   21.112224]  ? dc_remove_plane_from_context+0x1fc/0x240 [amdgpu]
[   21.112276]  dc_commit_state+0x2c6/0x520 [amdgpu]
[   21.112334]  amdgpu_dm_atomic_commit_tail+0x37a/0xd80 [amdgpu]
[   21.112338]  ? __wake_up_common_lock+0x89/0xc0
[   21.112341]  ? _cond_resched+0x15/0x30
[   21.112342]  ? wait_for_completion_timeout+0x3b/0x1a0
[   21.112399]  ? amdgpu_dm_atomic_commit_tail+0xd80/0xd80 [amdgpu]
[   21.112407]  commit_tail+0x3d/0x70 [drm_kms_helper]
[   21.112414]  drm_atomic_helper_commit+0xb4/0x120 [drm_kms_helper]
[   21.112428]  drm_framebuffer_remove+0x361/0x410 [drm]
[   21.112442]  drm_mode_rmfb_work_fn+0x4f/0x60 [drm]
[   21.112446]  process_one_work+0x1a7/0x360
[   21.112447]  worker_thread+0x30/0x390
[   21.112449]  ? pwq_unbound_release_workfn+0xd0/0xd0
[   21.112451]  kthread+0x112/0x130
[   21.112452]  ? kthread_bind+0x30/0x30
[   21.112454]  ret_from_fork+0x22/0x40
[   21.112456] ---[ end trace b22dbbbbffd241d9 ]---

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