https://bugs.freedesktop.org/show_bug.cgi?id=105018

--- Comment #35 from Adam Bolte <abolte@systemsaviour.com> ---
I believe I've been seeing the same bug as of late.

[Sat Jun 23 23:02:04 2018] ------------[ cut here ]------------
[Sat Jun 23 23:02:04 2018] kernel BUG at
drivers/gpu/drm/amd/amdgpu/../display/amdgpu_dm/amdgpu_dm.c:4713!
[Sat Jun 23 23:02:04 2018] invalid opcode: 0000 [#1] SMP PTI
[Sat Jun 23 23:02:04 2018] Modules linked in: ipt_REJECT(E) nf_reject_ipv4(E)
tun(E) bridge(E) stp(E) llc(E) fuse(E) ebtable_filter(E) ebtables(E)
ip6table_filter(E) ip6_tables(E) snd_hrtimer(E) snd_seq_midi(E)
snd_seq_midi_event(E) snd_rawmidi(E) snd_seq(E) snd_seq_device(E)
cpufreq_conservative(E) cpufreq_powersave(E) cpufreq_userspace(E)
nf_log_ipv4(E) nf_log_common(E) xt_LOG(E) xt_multiport(E) xt_conntrack(E)
iptable_filter(E) ipt_MASQUERADE(E) nf_nat_masquerade_ipv4(E) iptable_nat(E)
nf_conntrack_ipv4(E) nf_defrag_ipv4(E) nf_nat_ipv4(E) nf_nat(E) nf_conntrack(E)
xt_CHECKSUM(E) xt_tcpudp(E) iptable_mangle(E) binfmt_misc(E) nls_ascii(E)
nls_cp437(E) vfat(E) fat(E) mxm_wmi(E) amdkfd(E) snd_hda_codec_realtek(E)
snd_hda_codec_generic(E) amdgpu(E) intel_rapl(E) x86_pkg_temp_thermal(E)
intel_powerclamp(E) snd_hda_codec_hdmi(E)
[Sat Jun 23 23:02:04 2018]  chash(E) gpu_sched(E) snd_hda_intel(E) kvm_intel(E)
ttm(E) snd_hda_codec(E) efi_pstore(E) drm_kms_helper(E) snd_hda_core(E)
snd_pcsp(E) kvm(E) snd_hwdep(E) snd_pcm_oss(E) drm(E) irqbypass(E)
snd_mixer_oss(E) intel_cstate(E) snd_pcm(E) mei_me(E) i2c_algo_bit(E)
intel_uncore(E) snd_timer(E) coretemp(E) vhba(OE) snd(E) iTCO_wdt(E)
intel_rapl_perf(E) efivars(E) joydev(E) evdev(E) iTCO_vendor_support(E)
soundcore(E) shpchp(E) mei(E) sg(E) intel_pch_thermal(E) wmi(E) video(E)
acpi_pad(E) button(E) nfsd(E) auth_rpcgss(E) nfs_acl(E) lockd(E) grace(E)
parport_pc(E) ppdev(E) sunrpc(E) lp(E) parport(E) efivarfs(E) ip_tables(E)
x_tables(E) autofs4(E) ext4(E) crc16(E) mbcache(E) jbd2(E) fscrypto(E) btrfs(E)
zstd_decompress(E) zstd_compress(E) xxhash(E) algif_skcipher(E) af_alg(E)
raid10(E) raid456(E)
[Sat Jun 23 23:02:04 2018]  async_raid6_recov(E) async_memcpy(E) async_pq(E)
async_xor(E) async_tx(E) xor(E) raid6_pq(E) libcrc32c(E) crc32c_generic(E)
raid1(E) multipath(E) linear(E) dm_mirror(E) dm_region_hash(E) dm_log(E)
dm_crypt(E) dm_mod(E) raid0(E) md_mod(E) hid_generic(E) usbhid(E) hid(E)
sr_mod(E) cdrom(E) sd_mod(E) uas(E) usb_storage(E) crct10dif_pclmul(E)
crc32_pclmul(E) crc32c_intel(E) ghash_clmulni_intel(E) pcbc(E) aesni_intel(E)
ahci(E) xhci_pci(E) aes_x86_64(E) libahci(E) crypto_simd(E) nvme(E) xhci_hcd(E)
cryptd(E) glue_helper(E) libata(E) i2c_i801(E) alx(E) mdio(E) nvme_core(E)
scsi_mod(E) usbcore(E) fan(E) thermal(E)
[Sat Jun 23 23:02:04 2018] CPU: 2 PID: 1340 Comm: Xorg Tainted: G        W  OE 
   4.17.2+ #2
[Sat Jun 23 23:02:04 2018] Hardware name: MSI MS-7976/Z170A GAMING M7
(MS-7976), BIOS 1.J0 12/07/2017
[Sat Jun 23 23:02:04 2018] RIP: 0010:dm_update_crtcs_state+0x424/0x4b0 [amdgpu]
[Sat Jun 23 23:02:04 2018] RSP: 0018:ffffb84fc4affa90 EFLAGS: 00010246
[Sat Jun 23 23:02:04 2018] RAX: 0000000000000000 RBX: ffff9d7e34528280 RCX:
fffff1505f079c9f
[Sat Jun 23 23:02:04 2018] RDX: 0000000000000017 RSI: ffff9d7e41f63800 RDI:
0000000000000286
[Sat Jun 23 23:02:04 2018] RBP: 0000000000000000 R08: 0000000000000000 R09:
0000000000000000
[Sat Jun 23 23:02:04 2018] R10: ffffb84fc4affa90 R11: 00000000000005a0 R12:
ffff9d7e41f63800
[Sat Jun 23 23:02:04 2018] R13: ffff9d7ec0f61800 R14: ffff9d7ec66a8c00 R15:
0000000000000000
[Sat Jun 23 23:02:04 2018] FS:  00007f614ec0ba40(0000)
GS:ffff9d7eeec80000(0000) knlGS:0000000000000000
[Sat Jun 23 23:02:04 2018] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[Sat Jun 23 23:02:04 2018] CR2: 00007f1dbb1ec0c8 CR3: 000000081aa56005 CR4:
00000000003606e0
[Sat Jun 23 23:02:04 2018] DR0: 0000000000000000 DR1: 0000000000000000 DR2:
0000000000000000
[Sat Jun 23 23:02:04 2018] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7:
0000000000000400
[Sat Jun 23 23:02:04 2018] Call Trace:
[Sat Jun 23 23:02:04 2018]  amdgpu_dm_atomic_check+0x1a1/0x3d0 [amdgpu]
[Sat Jun 23 23:02:04 2018]  drm_atomic_check_only+0x3f3/0x4f0 [drm]
[Sat Jun 23 23:02:04 2018]  ? handle_conflicting_encoders+0x26c/0x280
[drm_kms_helper]
[Sat Jun 23 23:02:04 2018]  drm_atomic_commit+0x13/0x50 [drm]
[Sat Jun 23 23:02:04 2018]  drm_atomic_helper_set_config+0x67/0x90
[drm_kms_helper]
[Sat Jun 23 23:02:04 2018]  __drm_mode_set_config_internal+0x67/0x110 [drm]
[Sat Jun 23 23:02:04 2018]  drm_mode_setcrtc+0x452/0x5a0 [drm]
[Sat Jun 23 23:02:04 2018]  ? amdgpu_cs_wait_ioctl+0xe5/0x160 [amdgpu]
[Sat Jun 23 23:02:04 2018]  ? drm_mode_getcrtc+0x170/0x170 [drm]
[Sat Jun 23 23:02:04 2018]  drm_ioctl_kernel+0x67/0xb0 [drm]
[Sat Jun 23 23:02:04 2018]  drm_ioctl+0x2d1/0x390 [drm]
[Sat Jun 23 23:02:04 2018]  ? drm_mode_getcrtc+0x170/0x170 [drm]
[Sat Jun 23 23:02:04 2018]  amdgpu_drm_ioctl+0x49/0x80 [amdgpu]
[Sat Jun 23 23:02:04 2018]  do_vfs_ioctl+0xa2/0x620
[Sat Jun 23 23:02:04 2018]  ? __x64_sys_futex+0x88/0x180
[Sat Jun 23 23:02:04 2018]  ksys_ioctl+0x70/0x80
[Sat Jun 23 23:02:04 2018]  __x64_sys_ioctl+0x16/0x20
[Sat Jun 23 23:02:04 2018]  do_syscall_64+0x55/0x100
[Sat Jun 23 23:02:04 2018]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[Sat Jun 23 23:02:04 2018] RIP: 0033:0x7f614c650dd7
[Sat Jun 23 23:02:04 2018] RSP: 002b:00007ffd9280d9d8 EFLAGS: 00000246
ORIG_RAX: 0000000000000010
[Sat Jun 23 23:02:04 2018] RAX: ffffffffffffffda RBX: 000000000000000d RCX:
00007f614c650dd7
[Sat Jun 23 23:02:04 2018] RDX: 00007ffd9280da10 RSI: 00000000c06864a2 RDI:
000000000000000d
[Sat Jun 23 23:02:04 2018] RBP: 00007ffd9280da10 R08: 0000000000000000 R09:
000055a69128dca0
[Sat Jun 23 23:02:04 2018] R10: 00007ffd9280dad0 R11: 0000000000000246 R12:
00000000c06864a2
[Sat Jun 23 23:02:04 2018] R13: 000000000000000d R14: 000055a690954b90 R15:
000055a69128dca0
[Sat Jun 23 23:02:04 2018] Code: 4c 89 ee 48 89 c7 e8 bc f5 ff ff 84 c0 0f 84
b7 fe ff ff e9 a0 fe ff ff 48 83 b8 08 0d 00 00 00 0f 85 67 ff ff ff e9 f5 fe
ff ff <0f> 0b 41 8b 4f 60 48 c7 c2 d0 95 c7 c0 48 c7 c6 a0 57 ca c0 bf 
[Sat Jun 23 23:02:04 2018] RIP: dm_update_crtcs_state+0x424/0x4b0 [amdgpu] RSP:
ffffb84fc4affa90
[Sat Jun 23 23:02:04 2018] ---[ end trace 293f9551ffc27adc ]---

This is on a Fiji card. I have a 144Hz FreeSync-capable monitor, and can easily
reproduce the error with this command (where 143.86 is the xrandr-advertised
maximum frequency):

xrandr --output DisplayPort-0 --mode 2560x1440 --rate 143.86 --set "scaling
mode" "Full aspect"

Interestingly xrandr reports 59.95*+ as the current frequency, but my monitor
says 144Hz. I tried firing up Grey Goo under Wine and that game reports my
monitor running at 144Hz also. If I just run:

xrandr --output DisplayPort-0 --mode 2560x1440 --rate 143.86

then xrandr correctly reports 143.86* indicating that that frequency is now
selected.

I can also run the following:

xrandr --output DisplayPort-0 --mode 2560x1440 --set "scaling mode" "Full
aspect"

But if I combine these options as per the first command above, I get GUI crash.

The symptoms are simiar. In my case the screen is still on (not blank) but
completely frozen. I was able to SSH in to get the above trace from the dmesg
command. The machine cannot successfully shutdown or reboot and I need to
physically hard reset the box at this point.

As others have said, this is definitely a regression. This didn't happen in
older kernels.

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