I am not sure what changed (I have run apt upgrade a couple of times),
but I am no longer having this issue.
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https://bugs.launchpad.net/bugs/1814400
Title:
Thinkpad X250
Public bug reported:
My X250 has worked with the docking station for just over three years
but the latest kernel update (4.15.0-45-generic) seems to have broken
the ability to undock.
To reproduce:
1. Turn the laptop on and log in.
2. Dock the laptop.
3. Undock the laptop.
This leaves the
I just tried out the mainline 4.9-rc7 kernel and this seems to fix the
problem. I am able to dock and undock and in addition suspend works
after undocking.
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I also can confirm that the latest kernel update (4.8.0-28-generic) has
fixed the problem to connecting to the project through VGA.
I'm not sure if this is related, but the kernel update killed proper
docking for the same machine, see:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1634325
As I mentioned above, disconnecting from the docking station was
problematic with 16.04 and once I upgraded to 16.10 the docking and
subsequent suspend worked. A new kernel update came through today:
Linux garuda 4.8.0-28-generic #30-Ubuntu SMP Fri Nov 11 14:03:52 UTC
2016 x86_64 x86_64 x86_64
I did not have time to try other kernels with 16.04 but I did upgrade to
16.10 and the computer is now able to suspend after being released from
the dock. This works but causes the computer to lag and also randomly
shuts down Firefox on suspend and un-suspend.
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I found out that if I chain a VGA to HDMI adapter with an HDMI to mini-
displayport adapter that the projector is recognized and all works as
expected. But I'm not able to get a VGA to mini-diplayport adapter to
work.
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Today I directly connected my computer through HDMI (with mini-
displayport adpater) to the projector and it works fine. It may be
important to note that my university has a console which is in-between
the projector and the computer that somehow controls what the device the
VGA is connected to. I
Public bug reported:
I have a Lenovo Thinkpad X250 and I was running 16.04 and regularly
using a Panasonic PT-FIV430 FW430 WXGA projector with no issues. Once I
upgraded to 16.10 the operating system no longer detects the projector
through VGA (or if I use a mini-display adapter to connect to the
Public bug reported:
I have a Lenovo Thinkpad X250 and the ThinkPad Ultra Dock docking
station which is connected to two Lenovo monitors via DisplayPort.
Docking works fine but if I remove the computer from the dock and try to
suspend, the computer locks up (screen freezes no keyboard commands
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