Unwanted reboot after screen is locked

[Jacob Bunk Nielsen]

After locking the screen to leave the computer for a few minutes, I come back to a computer that is freshly rebooted. It usually happens 1 out of 4 or 5 times when locking the screen.

This only happens when my laptop (Lenovo T470s, also seen with T490) is connected to my USB-C dock. The problem has been observed with 18.04, 19.10 and 20.04.

/var/log/syslog contains:

Jun 30 10:47:05 jbn3 kernel: [33470.649606] [drm] Reducing the compressed framebuffer size. This may lead to less power savings than a non-reduced-size. Try to increase stolen memory size if available in BIOS.
Jun 30 10:47:23 jbn3 kernel: [33488.187142] [drm] Reducing the compressed framebuffer size. This may lead to less power savings than a non-reduced-size. Try to increase stolen memory size if available in BIOS.
Jun 30 10:47:23 jbn3 kernel: [33488.419723] [drm:pipe_config_mismatch [i915]] *ERROR* mismatch in pixel_rate (expected 241500, found 482999)
Jun 30 10:47:23 jbn3 kernel: [33488.419818] [drm:pipe_config_mismatch [i915]] *ERROR* mismatch in shared_dpll (expected 00000000a870403d, found 000000005108ff4b)
Jun 30 10:47:23 jbn3 kernel: [33488.419902] [drm:pipe_config_mismatch [i915]] *ERROR* mismatch in dpll_hw_state.ctrl1 (expected 0x00000003, found 0x00000001)
Jun 30 10:47:23 jbn3 kernel: [33488.419986] [drm:pipe_config_mismatch [i915]] *ERROR* mismatch in base.adjusted_mode.crtc_clock (expected 241500, found 482999)
Jun 30 10:47:23 jbn3 kernel: [33488.420067] [drm:pipe_config_mismatch [i915]] *ERROR* mismatch in port_clock (expected 270000, found 540000)
Jun 30 10:47:23 jbn3 kernel: [33488.420071] ------------[ cut here ]------------
Jun 30 10:47:23 jbn3 kernel: [33488.420072] pipe state doesn't match!
Jun 30 10:47:23 jbn3 kernel: [33488.420249] WARNING: CPU: 0 PID: 2300 at drivers/gpu/drm/i915/display/intel_display.c:13158 verify_crtc_state+0x2ad/0x300 [i915]
Jun 30 10:47:23 jbn3 kernel: [33488.420251] Modules linked in: xt_nat xt_tcpudp veth xt_conntrack xt_MASQUERADE nf_conntrack_netlink nfnetlink xfrm_user xfrm_algo xt_addrtype iptable_filter iptable_nat nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 bpfilter br_netfilter bridge stp llc hid_generic snd_usb_audio usbhid snd_usbmidi_lib hid cdc_ether r8152 vboxnetadp(OE) vboxnetflt(OE) vboxdrv(OE) ccm aufs overlay bnep nls_iso8859_1 joydev intel_rapl_msr mei_hdcp cdc_mbim qcserial usb_wwan cdc_wdm usbserial cdc_ncm usbnet mii uvcvideo btusb btrtl snd_hda_codec_hdmi btbcm btintel intel_rapl_common x86_pkg_temp_thermal intel_powerclamp coretemp bluetooth kvm_intel snd_hda_codec_realtek snd_hda_codec_generic kvm snd_hda_intel snd_intel_dspcfg snd_hda_codec intel_cstate rmi_smbus ecdh_generic rmi_core intel_rapl_perf ecc videobuf2_vmalloc snd_hda_core videobuf2_memops videobuf2_v4l2 snd_hwdep iwlmvm snd_seq_midi videobuf2_common snd_seq_midi_event mac80211 videodev intel_wmi_thunderbolt libarc4 snd_pcm input_leds iwlwifi
Jun 30 10:47:23 jbn3 kernel: [33488.420310] snd_rawmidi mc serio_raw snd_seq wmi_bmof thinkpad_acpi nvram cfg80211 ledtrig_audio mei_me intel_xhci_usb_role_switch mei snd_seq_device intel_pch_thermal snd_timer ucsi_acpi typec_ucsi roles typec snd soundcore acpi_pad mac_hid sch_fq_codel parport_pc ppdev lp parport ip_tables x_tables autofs4 btrfs xor zstd_compress raid6_pq libcrc32c dm_crypt uas usb_storage i915 crct10dif_pclmul crc32_pclmul nvme ghash_clmulni_intel i2c_algo_bit aesni_intel crypto_simd cryptd glue_helper psmouse e1000e i2c_i801 nvme_core drm_kms_helper syscopyarea sysfillrect sysimgblt fb_sys_fops thunderbolt drm wmi video
Jun 30 10:47:23 jbn3 kernel: [33488.420358] CPU: 0 PID: 2300 Comm: Xorg Tainted: G OE 5.4.0-39-generic #43-Ubuntu
Jun 30 10:47:23 jbn3 kernel: [33488.420360] Hardware name: LENOVO 20HF004MMX/20HF004MMX, BIOS N1WET59W (1.38 ) 04/22/2020
Jun 30 10:47:23 jbn3 kernel: [33488.420437] RIP: 0010:verify_crtc_state+0x2ad/0x300 [i915]
Jun 30 10:47:23 jbn3 kernel: [33488.420441] Code: b6 45 bf e9 8d fe ff ff 80 3d 45 77 10 00 00 0f b6 f0 48 c7 c7 40 aa 85 c0 75 32 e8 1d 48 d5 ff e9 1e fe ff ff e8 6e 9e b1 ef <0f> 0b e9 1b ff ff ff e8 62 9e b1 ef 0f 0b e9 85 fe ff ff e8 56 9e
Jun 30 10:47:23 jbn3 kernel: [33488.420444] RSP: 0018:ffffb1b74290fa80 EFLAGS: 00010282
Jun 30 10:47:23 jbn3 kernel: [33488.420448] RAX: 0000000000000000 RBX: ffff97a35f0002b0 RCX: 0000000000000006
Jun 30 10:47:23 jbn3 kernel: [33488.420450] RDX: 0000000000000007 RSI: 0000000000000092 RDI: ffff97a3724178c0
Jun 30 10:47:23 jbn3 kernel: [33488.420452] RBP: ffffb1b74290fac8 R08: 0000000000000ae9 R09: 0000000000000004
Jun 30 10:47:23 jbn3 kernel: [33488.420454] R10: 0000000000000000 R11: 0000000000000001 R12: ffff97a35f207000
Jun 30 10:47:23 jbn3 kernel: [33488.420456] R13: ffff97a35f0002b8 R14: ffff97a35f000000 R15: ffff97a139c69000
Jun 30 10:47:23 jbn3 kernel: [33488.420460] FS: 00007f4db55a5a80(0000) GS:ffff97a372400000(0000) knlGS:0000000000000000
Jun 30 10:47:23 jbn3 kernel: [33488.420462] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
Jun 30 10:47:23 jbn3 kernel: [33488.420464] CR2: 0000560cb50ab350 CR3: 00000004611bc001 CR4: 00000000003606f0
Jun 30 10:47:23 jbn3 kernel: [33488.420466] Call Trace:
Jun 30 10:47:23 jbn3 kernel: [33488.420551] intel_atomic_commit_tail+0xa43/0x12e0 [i915]
Jun 30 10:47:23 jbn3 kernel: [33488.420631] intel_atomic_commit+0x284/0x2b0 [i915]
Jun 30 10:47:23 jbn3 kernel: [33488.420672] drm_atomic_commit+0x4a/0x50 [drm]
Jun 30 10:47:23 jbn3 kernel: [33488.420703] drm_atomic_connector_commit_dpms+0xdf/0x100 [drm]
Jun 30 10:47:23 jbn3 kernel: [33488.420737] drm_mode_obj_set_property_ioctl+0x156/0x2a0 [drm]
Jun 30 10:47:23 jbn3 kernel: [33488.420771] ? drm_connector_set_obj_prop+0x90/0x90 [drm]
Jun 30 10:47:23 jbn3 kernel: [33488.420801] drm_connector_property_set_ioctl+0x3b/0x60 [drm]
Jun 30 10:47:23 jbn3 kernel: [33488.420825] drm_ioctl_kernel+0xae/0xf0 [drm]
Jun 30 10:47:23 jbn3 kernel: [33488.420848] drm_ioctl+0x234/0x3d0 [drm]
Jun 30 10:47:23 jbn3 kernel: [33488.420878] ? drm_connector_set_obj_prop+0x90/0x90 [drm]
Jun 30 10:47:23 jbn3 kernel: [33488.420886] ? __set_task_blocked+0x38/0xa0
Jun 30 10:47:23 jbn3 kernel: [33488.420895] ? apic_timer_interrupt+0xa/0x20
Jun 30 10:47:23 jbn3 kernel: [33488.420901] do_vfs_ioctl+0x407/0x670
Jun 30 10:47:23 jbn3 kernel: [33488.420905] ? __fget+0x3b/0x80
Jun 30 10:47:23 jbn3 kernel: [33488.420909] ksys_ioctl+0x67/0x90
Jun 30 10:47:23 jbn3 kernel: [33488.420913] __x64_sys_ioctl+0x1a/0x20
Jun 30 10:47:23 jbn3 kernel: [33488.420920] do_syscall_64+0x57/0x190
Jun 30 10:47:23 jbn3 kernel: [33488.420925] entry_SYSCALL_64_after_hwframe+0x44/0xa9
Jun 30 10:47:23 jbn3 kernel: [33488.420928] RIP: 0033:0x7f4db590337b
Jun 30 10:47:23 jbn3 kernel: [33488.420932] Code: 0f 1e fa 48 8b 05 15 3b 0d 00 64 c7 00 26 00 00 00 48 c7 c0 ff ff ff ff c3 66 0f 1f 44 00 00 f3 0f 1e fa b8 10 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d e5 3a 0d 00 f7 d8 64 89 01 48
Jun 30 10:47:23 jbn3 kernel: [33488.420935] RSP: 002b:00007ffcab128078 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
Jun 30 10:47:23 jbn3 kernel: [33488.420938] RAX: ffffffffffffffda RBX: 00007ffcab1280b0 RCX: 00007f4db590337b
Jun 30 10:47:23 jbn3 kernel: [33488.420940] RDX: 00007ffcab1280b0 RSI: 00000000c01064ab RDI: 000000000000000c
Jun 30 10:47:23 jbn3 kernel: [33488.420942] RBP: 00000000c01064ab R08: 000055e4b2aa9200 R09: 0000000000000000
Jun 30 10:47:23 jbn3 kernel: [33488.420944] R10: 000055e4b2aa9200 R11: 0000000000000246 R12: 000055e4b3c10ac0
Jun 30 10:47:23 jbn3 kernel: [33488.420946] R13: 000000000000000c R14: 0000000000000000 R15: 000055e4b14a0980
Jun 30 10:47:23 jbn3 kernel: [33488.420951] ---[ end trace 9f72fd99ce891449 ]---
Jun 30 10:47:24 jbn3 /usr/lib/gdm3/gdm-x-session[2300]: (II) modeset(0): EDID vendor "AUO", prod id 9277
Jun 30 10:47:24 jbn3 /usr/lib/gdm3/gdm-x-session[2300]: (II) modeset(0): Printing DDC gathered Modelines:
Jun 30 10:47:24 jbn3 /usr/lib/gdm3/gdm-x-session[2300]: (II) modeset(0): Modeline "1920x1080"x0.0 149.80 1920 1968 2068 2228 1080 1083 1084 1120 -hsync -vsync (67.2 kHz eP)
Jun 30 10:47:24 jbn3 /usr/lib/gdm3/gdm-x-session[2300]: (II) modeset(0): Modeline "1920x1080"x0.0 119.84 1920 1968 2068 2228 1080 1083 1084 1120 -hsync -vsync (53.8 kHz e)
^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Ubuntu Foundations Team Bug Bot (crichton)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. It seems that your bug report is not filed about a specific source package though, rather it is just filed against Ubuntu in general. It is important that bug reports be filed about source packages so that people interested in the package can find the bugs about it. You can find some hints about determining what package your bug might be about at https://wiki.ubuntu.com/Bugs/FindRightPackage. You might also ask for help in the #ubuntu-bugs irc channel on Freenode.

To change the source package that this bug is filed about visit https://bugs.launchpad.net/ubuntu/+bug/1885693/+editstatus and add the package name in the text box next to the word Package.

[This is an automated message. I apologize if it reached you inappropriately; please just reply to this message indicating so.]

[Jacob Bunk Nielsen (j0coe)]

After running "xset s off -dpms" I haven't seen any crashes for a few days. I used to have a few crashes every day when connecting to the dock.

[Launchpad Janitor (janitor)]

[Expired for linux (Ubuntu) because there has been no activity for 60 days.]

[Jacob Bunk Nielsen (j0coe)]

This is still a problem for me. What extra information would be required?