nVidia Quadro K3100M with nouveau driver will cause NULL pointer dereference when switching the screen back on

[Po-Hsu Lin]

This issue only exist when the video card is running with nouveau driver, it works fine with nvidia proprietary driver nvidia-384 installed.

Steps:
1. Install 18.04 Daily build
2. Boot to the desktop, leave it there and wait for the screen timeout setting kicks in (it will just turn-off the screen)
3. Try to bring the screen back by hitting any key

Expected result:
* Screen can be restored

Actual result:
* The system is still accessible through SSH, but the screen never came back, error message could be found in syslog:

Jan 9 17:57:21 Cadenza kernel: [ 1104.874825] BUG: unable to handle kernel NULL pointer dereference at 000000000000004d
Jan 9 17:57:21 Cadenza kernel: [ 1104.874882] IP: nvkm_dp_acquire+0x51/0x3a0 [nouveau]
Jan 9 17:57:21 Cadenza kernel: [ 1104.874887] PGD 0
Jan 9 17:57:21 Cadenza kernel: [ 1104.874887] P4D 0
Jan 9 17:57:21 Cadenza kernel: [ 1104.874890]
Jan 9 17:57:21 Cadenza kernel: [ 1104.874896] Oops: 0000 [#1] SMP
Jan 9 17:57:21 Cadenza kernel: [ 1104.874900] Modules linked in: rfcomm ccm cmac bnep nls_iso8859_1 intel_rapl x86_pkg_temp_thermal intel_powerclamp coretemp cmdlinepart intel_spi_platform intel_spi kvm snd_hda_codec_hdmi irqbypass snd_hda_codec_idt spi_nor snd_hda_codec_generic mtd crct10dif_pclmul crc32_pclmul arc4 ghash_clmulni_intel pcbc snd_hda_intel snd_hda_codec aesni_intel aes_x86_64 snd_hda_core crypto_simd glue_helper cryptd snd_hwdep snd_pcm snd_seq_midi iwlmvm snd_seq_midi_event intel_cstate intel_rapl_perf mac80211 snd_rawmidi hp_wmi sparse_keymap snd_seq snd_seq_device btusb btrtl iwlwifi btbcm snd_timer uvcvideo rtsx_pci_ms btintel memstick videobuf2_vmalloc bluetooth videobuf2_memops cfg80211 videobuf2_v4l2 snd videobuf2_core videodev mei_me input_leds soundcore joydev hid_multitouch media wmi_bmof ecdh_generic lpc_ich
Jan 9 17:57:21 Cadenza kernel: [ 1104.874960] mei shpchp ie31200_edac tpm_infineon mac_hid sch_fq_codel parport_pc ppdev lp parport ip_tables x_tables autofs4 hid_generic usbhid hid nouveau rtsx_pci_sdmmc mxm_wmi i2c_algo_bit ttm drm_kms_helper syscopyarea sysfillrect e1000e sysimgblt fb_sys_fops ahci drm libahci ptp rtsx_pci pps_core pata_acpi wmi video
Jan 9 17:57:21 Cadenza kernel: [ 1104.874989] CPU: 6 PID: 59 Comm: kworker/6:1 Not tainted 4.13.0-17-generic #20-Ubuntu
Jan 9 17:57:21 Cadenza kernel: [ 1104.874994] Hardware name: Hewlett-Packard HP Z1 G2 Touch Workstation/192F, BIOS L52 v81.14 05/09/2014
Jan 9 17:57:21 Cadenza kernel: [ 1104.875012] Workqueue: events nvkm_notify_work [nouveau]
Jan 9 17:57:21 Cadenza kernel: [ 1104.875017] task: ffff94dbef37c5c0 task.stack: ffffa37d81ae4000
Jan 9 17:57:21 Cadenza kernel: [ 1104.875041] RIP: 0010:nvkm_dp_acquire+0x51/0x3a0 [nouveau]
Jan 9 17:57:21 Cadenza kernel: [ 1104.875045] RSP: 0018:ffffa37d81ae7da8 EFLAGS: 00010297
Jan 9 17:57:21 Cadenza kernel: [ 1104.875049] RAX: ffff94dbef191018 RBX: ffff94dbeecea328 RCX: ffff94dbfdd9bb20
Jan 9 17:57:21 Cadenza kernel: [ 1104.875053] RDX: ffff94dbef37c5c0 RSI: ffff94dbfdd9bb20 RDI: ffff94dbeecea328
Jan 9 17:57:21 Cadenza kernel: [ 1104.875057] RBP: ffffa37d81ae7de8 R08: 0000000000000000 R09: ffff94dbeece1060
Jan 9 17:57:21 Cadenza kernel: [ 1104.875064] R10: ffff94dbeece1008 R11: 00000000000002f1 R12: ffff94dbeecea200
Jan 9 17:57:21 Cadenza kernel: [ 1104.875068] R13: 0000000000000000 R14: ffff94dbef19ede0 R15: ffff94dbef280e40
Jan 9 17:57:21 Cadenza kernel: [ 1104.875073] FS: 0000000000000000(0000) GS:ffff94dbfdd80000(0000) knlGS:0000000000000000
Jan 9 17:57:21 Cadenza kernel: [ 1104.875077] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
Jan 9 17:57:21 Cadenza kernel: [ 1104.875080] CR2: 000000000000004d CR3: 0000000094209000 CR4: 00000000001406e0
Jan 9 17:57:21 Cadenza kernel: [ 1104.875085] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
Jan 9 17:57:21 Cadenza kernel: [ 1104.875088] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Jan 9 17:57:21 Cadenza kernel: [ 1104.875092] Call Trace:
Jan 9 17:57:21 Cadenza kernel: [ 1104.875100] ? pick_next_task_fair+0x131/0x560
Jan 9 17:57:21 Cadenza kernel: [ 1104.875123] nvkm_dp_hpd+0x6e/0x140 [nouveau]
Jan 9 17:57:21 Cadenza kernel: [ 1104.875140] nvkm_notify_work+0x1d/0x70 [nouveau]
Jan 9 17:57:21 Cadenza kernel: [ 1104.875146] process_one_work+0x1e7/0x410
Jan 9 17:57:21 Cadenza kernel: [ 1104.875150] worker_thread+0x4a/0x410
Jan 9 17:57:21 Cadenza kernel: [ 1104.875154] kthread+0x125/0x140
Jan 9 17:57:21 Cadenza kernel: [ 1104.875159] ? process_one_work+0x410/0x410
Jan 9 17:57:21 Cadenza kernel: [ 1104.875162] ? kthread_create_on_node+0x70/0x70
Jan 9 17:57:21 Cadenza kernel: [ 1104.875169] ret_from_fork+0x25/0x30
Jan 9 17:57:21 Cadenza kernel: [ 1104.875172] Code: df 65 48 8b 04 25 28 00 00 00 48 89 45 d0 31 c0 e8 45 15 a6 d1 4d 8b 54 24 08 49 8b 42 58 4d 8d 4a 58 49 39 c1 0f 84 b0 00 00 00 <45> 0f b6 45 4d 48 8d 78 e8 31 f6 41 bb d3 4d 62 10 41 d0 e8 41
Jan 9 17:57:21 Cadenza kernel: [ 1104.875218] RIP: nvkm_dp_acquire+0x51/0x3a0 [nouveau] RSP: ffffa37d81ae7da8
Jan 9 17:57:21 Cadenza kernel: [ 1104.875221] CR2: 000000000000004d
Jan 9 17:57:21 Cadenza kernel: [ 1104.886187] ---[ end trace e0f816505da8bc51 ]---
Jan 9 17:58:01 Cadenza CRON[21941]: (root) CMD ( test -x /etc/cron.daily/popularity-contest && /etc/cron.daily/popularity-contest --crond)
Jan 9 17:58:25 Cadenza wpa_supplicant[939]: wls1: SME: Trying to authenticate with 18:9c:5d:31:3f:e0 (SSID='Canonical-2.4GHz-g' freq=2412 MHz)
Jan 9 17:58:25 Cadenza kernel: [ 1169.111509] wls1: disconnect from AP a4:56:30:cc:0f:30 for new auth to 18:9c:5d:31:3f:e0
Jan 9 17:58:25 Cadenza kernel: [ 1169.125237] wls1: authenticate with 18:9c:5d:31:3f:e0
Jan 9 17:58:25 Cadenza kernel: [ 1169.127211] wls1: send auth to 18:9c:5d:31:3f:e0 (try 1/3)
Jan 9 17:58:25 Cadenza NetworkManager[756]: <info> [1515491905.9532] device (wls1): supplicant interface state: completed -> authenticating
Jan 9 17:58:25 Cadenza wpa_supplicant[939]: wls1: Trying to associate with 18:9c:5d:31:3f:e0 (SSID='Canonical-2.4GHz-g' freq=2412 MHz)
Jan 9 17:58:25 Cadenza kernel: [ 1169.130110] wls1: authenticated
Jan 9 17:58:25 Cadenza kernel: [ 1169.130381] wls1: associate with 18:9c:5d:31:3f:e0 (try 1/3)
Jan 9 17:58:25 Cadenza wpa_supplicant[939]: wls1: Associated with 18:9c:5d:31:3f:e0
Jan 9 17:58:25 Cadenza kernel: [ 1169.132230] wls1: RX AssocResp from 18:9c:5d:31:3f:e0 (capab=0x431 status=0 aid=2)
Jan 9 17:58:25 Cadenza kernel: [ 1169.133220] wls1: associated
Jan 9 17:58:25 Cadenza NetworkManager[756]: <info> [1515491905.9638] device (wls1): supplicant interface state: authenticating -> 4-way handshake
Jan 9 17:58:25 Cadenza wpa_supplicant[939]: wls1: WPA: Key negotiation completed with 18:9c:5d:31:3f:e0 [PTK=CCMP GTK=CCMP]
Jan 9 17:58:25 Cadenza wpa_supplicant[939]: wls1: CTRL-EVENT-CONNECTED - Connection to 18:9c:5d:31:3f:e0 completed [id=0 id_str=]
Jan 9 17:58:25 Cadenza wpa_supplicant[939]: p2p-dev-wls1: CTRL-EVENT-REGDOM-CHANGE init=CORE type=WORLD
Jan 9 17:58:25 Cadenza NetworkManager[756]: <info> [1515491905.9728] device (wls1): supplicant interface state: 4-way handshake -> completed
Jan 9 17:58:25 Cadenza systemd-udevd[21946]: Process '/sbin/crda' failed with exit code 249.
Jan 9 17:58:25 Cadenza wpa_supplicant[939]: p2p-dev-wls1: CTRL-EVENT-REGDOM-CHANGE init=COUNTRY_IE type=COUNTRY alpha2=TW
Jan 9 17:58:56 Cadenza kernel: [ 1200.172510] nouveau 0000:01:00.0: DRM: EVO timeout
Jan 9 17:58:58 Cadenza kernel: [ 1202.172492] nouveau 0000:01:00.0: DRM: base-0: timeout
Jan 9 17:59:02 Cadenza kernel: [ 1205.215081] nouveau 0000:01:00.0: DRM: base-0: timeout
Jan 9 17:59:04 Cadenza kernel: [ 1207.242150] nouveau 0000:01:00.0: DRM: base-0: timeout

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: linux-image-4.13.0-17-generic 4.13.0-17.20 [modified: boot/vmlinuz-4.13.0-17-generic]
ProcVersionSignature: Ubuntu 4.13.0-17.20-generic 4.13.8
Uname: Linux 4.13.0-17-generic x86_64
ApportVersion: 2.20.8-0ubuntu6
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC1: sam 1355 F.... pulseaudio
 /dev/snd/controlC0: sam 1355 F.... pulseaudio
Date: Tue Jan 9 18:21:19 2018
InstallationDate: Installed on 2018-01-09 (0 days ago)
InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Alpha amd64 (20180101)
MachineType: Hewlett-Packard HP Z1 G2 Touch Workstation
ProcFB: 0 nouveaufb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.13.0-17-generic.efi.signed root=UUID=1c2de52d-318e-486d-a69a-ca1cafe9d40b ro quiet splash vt.handoff=7
RelatedPackageVersions:
 linux-restricted-modules-4.13.0-17-generic N/A
 linux-backports-modules-4.13.0-17-generic N/A
 linux-firmware 1.170
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 05/09/2014
dmi.bios.vendor: Hewlett-Packard
dmi.bios.version: L52 v81.14
dmi.board.asset.tag: 2UA4081F8X
dmi.board.name: 192F
dmi.board.vendor: Hewlett-Packard
dmi.chassis.asset.tag: 2UA4081F8X
dmi.chassis.type: 4
dmi.chassis.vendor: Hewlett-Packard
dmi.modalias: dmi:bvnHewlett-Packard:bvrL52v81.14:bd05/09/2014:svnHewlett-Packard:pnHPZ1G2TouchWorkstation:pvr:rvnHewlett-Packard:rn192F:rvr:cvnHewlett-Packard:ct4:cvr:
dmi.product.family: 103C_53335X G=D
dmi.product.name: HP Z1 G2 Touch Workstation
dmi.sys.vendor: Hewlett-Packard

[Ubuntu Kernel Bot (ubuntu-kernel-bot)]

This change was made by a bot.

[Po-Hsu Lin (cypressyew)]

Tested with the mainline kernel 4.15.0-041500rc7, this issue still exist.
Log can be found here: https://pastebin.ubuntu.com/26352444/