Bug 204575

Summary:	Connect a thunderbolt/usb-c dock hang the laptop after resume
Product:	Drivers	Reporter:	Alessandro Surace (zioalex)
Component:	Video(DRI - non Intel)	Assignee:	drivers_video-dri
Status:	RESOLVED INVALID
Severity:	normal
Priority:	P1
Hardware:	All
OS:	Linux
Kernel Version:	5.0.0-23-generic	Subsystem:
Regression:	No	Bisected commit-id:
Attachments:	Kernel trace

Description Alessandro Surace 2019-08-14 09:31:38 UTC

Created attachment 284381 [details]
Kernel trace

I am experiencing a problem when I connect a Cable matters USB-C/Thunderbolt dock to my resumed laptop.

I see in the logs the follow trace:
Aug 14 09:29:05 asurace-signavio kernel: BUG: unable to handle kernel NULL pointer dereference at 0000000000000318
Aug 14 09:29:05 asurace-signavio kernel: #PF error: [WRITE]
Aug 14 09:29:05 asurace-signavio kernel: PGD 0 P4D 0 
Aug 14 09:29:05 asurace-signavio kernel: Oops: 0002 [#1] SMP NOPTI
Aug 14 09:29:05 asurace-signavio kernel: CPU: 4 PID: 21365 Comm: kworker/4:2 Tainted: G           O      5.0.0-23-generic #24~18.04.1-Ubuntu
Aug 14 09:29:05 asurace-signavio kernel: Hardware name: LENOVO 20N2S0M700/20N2S0M700, BIOS N2IET71W (1.49 ) 07/03/2019
Aug 14 09:29:05 asurace-signavio kernel: Workqueue: events_long drm_dp_mst_link_probe_work [drm_kms_helper]
Aug 14 09:29:05 asurace-signavio kernel: RIP: 0010:mutex_lock+0x1d/0x40
Aug 14 09:29:05 asurace-signavio kernel: Code: 5d c3 90 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 55 48 89 e5 53 48 89 fb e8 ce e6 ff ff 65 48 8b 14 25 00 5c 01 00 31 c0 <f0> 48 0f b1 13 75 03 5b 5d c3 48 89 df e8 b1 ff ff ff 5b 5d c3 0f
Aug 14 09:29:05 asurace-signavio kernel: RSP: 0018:ffffbc3848adfbf0 EFLAGS: 00010246
Aug 14 09:29:05 asurace-signavio kernel: RAX: 0000000000000000 RBX: 0000000000000318 RCX: ffffbc3844097898
Aug 14 09:29:05 asurace-signavio kernel: RDX: ffff955424f9de00 RSI: 0000000000000216 RDI: 0000000000000318
Aug 14 09:29:05 asurace-signavio kernel: RBP: ffffbc3848adfbf8 R08: ffff9554be51ab70 R09: 0000000000000000
Aug 14 09:29:05 asurace-signavio kernel: R10: 0000000000000000 R11: 0000000000000008 R12: 00000000000003db
Aug 14 09:29:05 asurace-signavio kernel: R13: ffff9554ae4e57b8 R14: ffff9554b9222060 R15: 00000000000003db
Aug 14 09:29:05 asurace-signavio kernel: FS:  0000000000000000(0000) GS:ffff9554be500000(0000) knlGS:0000000000000000
Aug 14 09:29:05 asurace-signavio kernel: CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
Aug 14 09:29:05 asurace-signavio kernel: CR2: 0000000000000318 CR3: 0000000405c0e004 CR4: 00000000003626e0
Aug 14 09:29:05 asurace-signavio kernel: Call Trace:
Aug 14 09:29:05 asurace-signavio kernel:  drm_dp_mst_wait_tx_reply+0x155/0x1f0 [drm_kms_helper]

Full log in attachment.
The dock is the follow:
Aug 05 10:50:55 asurace-signavio kernel: usb 1-5.2: Manufacturer: Cable Matters Inc
Aug 05 10:50:55 asurace-signavio kernel: usb 1-5.2: SerialNumber: 11AD1D09E0304812191F0B00
Aug 05 10:50:55 asurace-signavio kernel: usb 1-5.3: new low-speed USB device number 8 using xhci_hcd
Aug 05 10:50:55 asurace-signavio kernel: usb 1-5.3: New USB device found, idVendor=046d, idProduct=c31c, bcdDevice=64.00


https://kb.cablematters.com/index.php?View=entry&EntryID=84

Comment 1 Jani Nikula 2019-08-21 09:37:02 UTC

Please file drm/i915 bugs at [1], and report or fix any links suggesting you should file them here.

[1] https://bugs.freedesktop.org/enter_bug.cgi?product=DRI&component=DRM/Intel

Comment 2 Alessandro Surace 2019-08-21 21:33:12 UTC

Thanks Jani.
It can be related with https://bugs.freedesktop.org/show_bug.cgi?id=107738 .
Checking it.

Comment 3 Alessandro Surace 2019-08-27 07:51:04 UTC

Opened a new bug https://bugs.freedesktop.org/show_bug.cgi?id=111497