Comment 0 for bug 1813745

I updated my machine's kernel to 4.15.0-44. After a restart the whole machine was messed up.

The machine starts regularly up to the point, where the graphical interface would appear (rough guess). The monitor gets black (normal) to change the screen resolution. Unfortunately, the monitor never comes back to life. Nothing useful is displayed anymore and my input devices are non-functional. I cannot change to any tty not change the state of the Num-Lock-LED on the keyboard.

4.15.0-43 kernel boots fine from grub-menu. From there, demsg shows a crash in Intel video driver:

[ 47.320244] ------------[ cut here ]------------
[ 47.320245] Unknown pixelformat 0x00000000
[ 47.320267] WARNING: CPU: 2 PID: 3603 at /build/linux-vxxS7y/linux-4.15.0/drivers/media/v4l2-core/v4l2-ioctl.c:1291 v4l_fill_fmtdesc+0xf41/0x1250 [videodev]
[ 47.320267] Modules linked in: rfcomm hid_generic uhid algif_hash algif_skcipher af_alg thunderbolt xt_CHECKSUM iptable_mangle ipt_MASQUERADE nf_nat_masquerade_ipv4 cdc_ether usbnet iptable_nat nf_nat_ipv4 nf_nat ipheth r8152 mii snd_usb_audio snd_usbmidi_lib msr nf_conntrack_ipv4 nf_defrag_ipv4 xt_conntrack nf_conntrack libcrc32c ipt_REJECT nf_reject_ipv4 xt_tcpudp cmac bridge stp llc bnep uvcvideo videobuf2_vmalloc videobuf2_memops videobuf2_v4l2 videobuf2_core videodev media arc4 btusb btrtl btbcm btintel bluetooth ecdh_generic ebtable_filter ebtables devlink ip6table_filter ip6_tables pci_stub vboxpci(O) vboxnetadp(O) vboxnetflt(O) iptable_filter vboxdrv(O) snd_hda_codec_hdmi hid_multitouch snd_hda_codec_realtek dell_laptop snd_hda_codec_generic snd_soc_skl snd_soc_skl_ipc snd_hda_ext_core snd_soc_sst_dsp
[ 47.320292] snd_soc_sst_ipc snd_soc_acpi snd_soc_core snd_compress ac97_bus snd_pcm_dmaengine intel_rapl x86_pkg_temp_thermal intel_powerclamp crct10dif_pclmul crc32_pclmul ghash_clmulni_intel pcbc aesni_intel aes_x86_64 crypto_simd glue_helper cryptd intel_cstate intel_rapl_perf binfmt_misc kvm_intel kvm irqbypass joydev input_leds nls_iso8859_1 serio_raw snd_hda_intel dell_wmi snd_hda_codec dell_smbios dcdbas snd_hda_core dell_wmi_descriptor snd_hwdep wmi_bmof intel_wmi_thunderbolt snd_pcm snd_seq_midi snd_seq_midi_event snd_rawmidi snd_seq snd_seq_device snd_timer snd soundcore ath10k_pci ath10k_core ath mac80211 idma64 virt_dma cfg80211 rtsx_pci_ms memstick mei_me intel_lpss_pci processor_thermal_device shpchp mei intel_lpss intel_soc_dts_iosf intel_pch_thermal int3403_thermal int340x_thermal_zone
[ 47.320325] intel_hid int3400_thermal mac_hid acpi_thermal_rel acpi_pad sparse_keymap sch_fq_codel coretemp parport_pc ppdev lp parport sunrpc ip_tables x_tables autofs4 btrfs xor zstd_compress raid6_pq uas usb_storage hid_logitech_hidpp hid_logitech_dj usbhid rtsx_pci_sdmmc i915 i2c_algo_bit drm_kms_helper syscopyarea sysfillrect psmouse sysimgblt nvme fb_sys_fops i2c_i801 nvme_core drm rtsx_pci i2c_hid wmi hid video pinctrl_sunrisepoint
[ 47.320346] CPU: 2 PID: 3603 Comm: AudioThread Tainted: G O 4.15.0-43-generic #46-Ubuntu
[ 47.320347] Hardware name: Dell Inc. XPS 13 9370/0F6P3V, BIOS 1.6.3 11/04/2018
[ 47.320350] RIP: 0010:v4l_fill_fmtdesc+0xf41/0x1250 [videodev]
[ 47.320350] RSP: 0018:ffffa8cc4530bc30 EFLAGS: 00010282
[ 47.320351] RAX: 0000000000000000 RBX: ffffa8cc4530bd68 RCX: 0000000000000006
[ 47.320352] RDX: 0000000000000007 RSI: 0000000000000086 RDI: ffff8c8d6e496490
[ 47.320352] RBP: ffffa8cc4530bc40 R08: 0000000000000001 R09: 00000000000004c7
[ 47.320353] R10: ffff8c8d5abe2d00 R11: 0000000000000000 R12: ffff8c8cda86c500
[ 47.320353] R13: ffffffffc11bc900 R14: ffff8c8d5abe2d80 R15: ffff8c8cda86c500
[ 47.320354] FS: 00007f9ad4ff9700(0000) GS:ffff8c8d6e480000(0000) knlGS:0000000000000000
[ 47.320355] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 47.320355] CR2: 00007ff9f0083905 CR3: 000000043fd80006 CR4: 00000000003606e0
[ 47.320356] Call Trace:
[ 47.320360] v4l_enum_fmt+0x74/0x110 [videodev]
[ 47.320362] __video_do_ioctl+0x370/0x380 [videodev]
[ 47.320364] ? terminate_walk+0x8e/0xf0
[ 47.320366] ? aa_path_perm+0xe2/0x130
[ 47.320367] ? aa_path_perm+0xf6/0x130
[ 47.320370] video_usercopy+0x24d/0x640 [videodev]
[ 47.320372] ? video_ioctl2+0x20/0x20 [videodev]
[ 47.320374] video_ioctl2+0x15/0x20 [videodev]
[ 47.320376] v4l2_ioctl+0xc8/0xf0 [videodev]
[ 47.320378] do_vfs_ioctl+0xa8/0x630
[ 47.320380] ? kmem_cache_free+0x1b3/0x1e0
[ 47.320381] ? putname+0x4c/0x60
[ 47.320382] ? do_sys_open+0x13e/0x2c0
[ 47.320383] SyS_ioctl+0x79/0x90
[ 47.320385] do_syscall_64+0x73/0x130
[ 47.320388] entry_SYSCALL_64_after_hwframe+0x3d/0xa2
[ 47.320389] RIP: 0033:0x7f9b28b15f47
[ 47.320389] RSP: 002b:00007f9ad4ff8318 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[ 47.320390] RAX: ffffffffffffffda RBX: 00007f9ad4ff8340 RCX: 00007f9b28b15f47
[ 47.320391] RDX: 00007f9ad4ff8500 RSI: 00000000c0405602 RDI: 000000000000006f
[ 47.320391] RBP: 0000000080685600 R08: 00007f9aa00007c8 R09: 00007f9aa000b700
[ 47.320392] R10: 00007f9aa00033ba R11: 0000000000000246 R12: 00007f9ad4ff8348
[ 47.320392] R13: 00007f9ad4ff8400 R14: 000000000000006f R15: 00007f9ad4ff8498
[ 47.320393] Code: 30 0f 84 b4 01 00 00 3d 4a 4c 32 30 0f 84 97 01 00 00 3d 4d 33 31 30 0f 84 7a 01 00 00 89 c6 48 c7 c7 d7 d2 17 c1 e8 9f 37 12 f3 <0f> 0b 80 7b 0c 00 0f 85 e2 f3 ff ff 8b 43 2c 48 c7 c1 7e c6 17
[ 47.320411] ---[ end trace 346dbacffbe49497 ]---

Additional information:

$ cat /proc/version_signature
Ubuntu 4.15.0-43.46-generic 4.15.18

$ sudo lspci
00:00.0 Host bridge: Intel Corporation Xeon E3-1200 v6/7th Gen Core Processor Host Bridge/DRAM Registers (rev 08)
00:02.0 VGA compatible controller: Intel Corporation UHD Graphics 620 (rev 07)
00:04.0 Signal processing controller: Intel Corporation Skylake Processor Thermal Subsystem (rev 08)
00:14.0 USB controller: Intel Corporation Sunrise Point-LP USB 3.0 xHCI Controller (rev 21)
00:14.2 Signal processing controller: Intel Corporation Sunrise Point-LP Thermal subsystem (rev 21)
00:15.0 Signal processing controller: Intel Corporation Sunrise Point-LP Serial IO I2C Controller #0 (rev 21)
00:15.1 Signal processing controller: Intel Corporation Sunrise Point-LP Serial IO I2C Controller #1 (rev 21)
00:16.0 Communication controller: Intel Corporation Sunrise Point-LP CSME HECI #1 (rev 21)
00:1c.0 PCI bridge: Intel Corporation Sunrise Point-LP PCI Express Root Port (rev f1)
00:1c.2 PCI bridge: Intel Corporation Sunrise Point-LP PCI Express Root Port (rev f1)
00:1c.4 PCI bridge: Intel Corporation Sunrise Point-LP PCI Express Root Port #5 (rev f1)
00:1d.0 PCI bridge: Intel Corporation Sunrise Point-LP PCI Express Root Port #9 (rev f1)
00:1f.0 ISA bridge: Intel Corporation Device 9d4e (rev 21)
00:1f.2 Memory controller: Intel Corporation Sunrise Point-LP PMC (rev 21)
00:1f.3 Audio device: Intel Corporation Sunrise Point-LP HD Audio (rev 21)
00:1f.4 SMBus: Intel Corporation Sunrise Point-LP SMBus (rev 21)
01:00.0 Unassigned class [ff00]: Realtek Semiconductor Co., Ltd. RTS525A PCI Express Card Reader (rev 01)
02:00.0 Network controller: Qualcomm Atheros QCA6174 802.11ac Wireless Network Adapter (rev 32)
03:00.0 PCI bridge: Intel Corporation JHL6540 Thunderbolt 3 Bridge (C step) [Alpine Ridge 4C 2016] (rev 02)
04:00.0 PCI bridge: Intel Corporation JHL6540 Thunderbolt 3 Bridge (C step) [Alpine Ridge 4C 2016] (rev 02)
04:01.0 PCI bridge: Intel Corporation JHL6540 Thunderbolt 3 Bridge (C step) [Alpine Ridge 4C 2016] (rev 02)
04:02.0 PCI bridge: Intel Corporation JHL6540 Thunderbolt 3 Bridge (C step) [Alpine Ridge 4C 2016] (rev 02)
04:04.0 PCI bridge: Intel Corporation JHL6540 Thunderbolt 3 Bridge (C step) [Alpine Ridge 4C 2016] (rev 02)
39:00.0 USB controller: Intel Corporation JHL6540 Thunderbolt 3 USB Controller (C step) [Alpine Ridge 4C 2016] (rev 02)
6e:00.0 Non-Volatile memory controller: Toshiba America Info Systems Device 0116