FS#46480 - [linux] System freeze with 4.2.1 when Dell E7440 laptop is docked in Dell E-port Plus replicator

Attached to Project: Arch Linux
Opened by Graham (gps1539) - Tuesday, 29 September 2015, 16:35 GMT
Last edited by Doug Newgard (Scimmia) - Monday, 01 February 2016, 15:24 GMT
Task Type Bug Report
Category Kernel
Status Closed
Assigned To Tobias Powalowski (tpowa)
Thomas Bächler (brain0)
Architecture x86_64
Severity Critical
Priority Normal
Reported Version
Due in Version Undecided
Due Date Undecided
Percent Complete 100%
Votes 2
Private No

Details

Description: After update to Kernel 4.2.1 Dell E7440 laptop freezes when docked in Dell E-port Plus replicator

- Laptop will boot and operate correctly when not docked.
- Laptop freezes soon after is it docked in the replicator.
- If booted when Laptop is docked in the replicator it freezes when it starts GDM

Additional info:
* Laptop is using gnome 3.16
* Reverting to 4.1.6 lts kernel solves the issue
* User neunerseb reply to a forum post stating they see a similar issue on Thinkpad T450

* I will try to capture a journald log and post here


Steps to reproduce:
Place Dell E7440 laptop in Dell E-port Plus replicator and boot.
This task depends upon

Closed by  Doug Newgard (Scimmia)
Monday, 01 February 2016, 15:24 GMT
Reason for closing:  Fixed
Additional comments about closing:  linux 4.2.2-1
Comment by Jeremy West (stuwrtlttle) - Tuesday, 29 September 2015, 17:45 GMT
I'm experiencing this same problem using a third-gen Lenovo X1 carbon laptop.
Comment by Jeremy West (stuwrtlttle) - Tuesday, 29 September 2015, 18:17 GMT
I'm attaching the journal containing revelent error/debug messaging.
   journalctl_output (1.19 MiB)
Comment by Graham (gps1539) - Tuesday, 29 September 2015, 20:43 GMT
Attaching the journal from my laptop
   journal (280.8 KiB)
Comment by Graham (gps1539) - Tuesday, 29 September 2015, 20:46 GMT
Here is the output of lspci when the laptop is docked.
   lspci_docked.txt (7.5 KiB)
Comment by Graham (gps1539) - Thursday, 01 October 2015, 21:05 GMT
Appears to be fixed in 4.2.2-1 for Dell E7440
Comment by Graham (gps1539) - Thursday, 01 October 2015, 21:14 GMT

Comment by Kevin (nivekuil) - Friday, 02 October 2015, 00:27 GMT
Same problem with the same machine. It seems to be a problem with the video card and an external display, the same bug as this one https://bugs.archlinux.org/task/46462.
Comment by Graham (gps1539) - Friday, 02 October 2015, 01:27 GMT
They may be related, but my initial workaround was to connect my external monitor directly to the undocked laptop and it worked fine.
Comment by Graham (gps1539) - Wednesday, 25 November 2015, 05:13 GMT
Per my comment on 10.1.15 this appears to be fixed and can be closed.

If I need to take action to close this, please let me know.

Loading...