OK, I'm on 4.8.0-45 now and it's working well again.
Will close this for now.
** Changed in: linux (Ubuntu)
Status: Confirmed => Fix Released
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This has stopped working in either 4.8.0-40 or 4.8.0-41.
It still works when booting with 4.8.0-39.
I can open a new one as regression, if necessary.
** Changed in: linux (Ubuntu)
Status: Fix Released => New
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** Changed in: linux (Ubuntu)
Status: Invalid => Fix Released
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https://bugs.launchpad.net/bugs/1651454
Title:
[Lenovo Thinkpad T460p] Ultra Dock external displays no
Upgraded the kernel through the standard channels:
$ uname -a
Linux talas 4.8.0-34-generic #36-Ubuntu SMP Wed Dec 21 17:24:18 UTC 2016 x86_64
x86_64 x86_64 GNU/Linux
The original problem seems fixed, it exhibits practically the same behaviour as
with 4.9.
Docking lights up the monitors, I still
Good news!
~$ uname -a
Linux talas 4.9.0-040900-generic #201612111631 SMP Sun Dec 11 21:33:00 UTC 2016
x86_64 x86_64 x86_64 GNU/Linux
Undocking and docking repeatedly works for me. None of the logs shows i915
errors.
I do have to killall unity-settings daemon at every docking to reload the
mon
A bit of random testing with undocking and docking repeatedly, with
sometimes 'killall unity-settings-daemon' to reread monitors.xml and
hopefully reset the display mode, shows weird behaviour.
After a docked fresh boot, after undocking i get for xrandr (SNIPs for
brevity):
Screen 0: minimum 320
Public bug reported:
The bug is identical to the expired
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1568573 where a new
report was requested.
This time around with a fresh install of 16.10 amd64 on a Thinkpad T460p
and a Lenovo Ultra Dock with two external monitors.
The setup does work
Same problem here, made a new report:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1651454
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https://bugs.launchpad.net/bugs/1568573
Title:
[Lenovo Thinkpad T460] Ul
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