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apport-collect 1813924
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This change has been made by an automated script, maintained by the
Ubuntu Kernel Team.
** Changed in: linux (Ubuntu)
Status: New => Incomplete
** Tags added: bionic
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https://bugs.launchpad.net/bugs/1813924
Title:
System freezes when undocking or changing to external screen while
docked
Status in linux package in Ubuntu:
Incomplete
Bug description:
With the recent kernel update yesterday (4.15.0-42), I am encountering
complete system freezes related to the Lenovo docking station:
1) When I boot while docked, I get stuck at black screen late in boot
sequence (after typing in disk decryption passphrase)
2) If I dock after boot, and undock the system freezes
3) If I dock after boot, and switch to external screen only (Win+P) the
system freezes
I am running Ubuntu 18.04 LTS on a Lenovo T460s and I have previously
been experiencing the bug reported below on Ubuntu 16.04, which was
fixed after reinstalling with Ubuntu 18.04 (and to later kernel
versions as described in the issue thread).
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1614513
It might be likely that this bug was reintroduced in kernel 4.15.0-42.
I have attached kernel log relevant to the system freeze in 3) above.
This is a work computer and I apologies if I cannot be helpful with
testing out various kernels for you, but maybe someone else in the
community is experiencing similar issues that is able to test kernel
patches to fix this issue.
Best regards
Christian
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