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] Ultra Dock
Eric Floehr (eric-intellovations), to track hardware, etc. it will help
immensely if you filed a new report with the Ubuntu repository kernel (not
mainline/upstream) via a terminal:
ubuntu-bug linux
Please feel free to subscribe me to it.
For more on why this is helpful, please see
I have this problem as well on a new Thinkpad T460 with fresh 16.04.1
install with all update, dock, and a Dell displayport monitor.
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Title:
[Expired for linux (Ubuntu) because there has been no activity for 60
days.]
** Changed in: linux (Ubuntu)
Status: Incomplete => Expired
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** Tags removed: latest-bios-1.10 needs-test-4.7-rc6
** Tags added: bios-outdated-1.13 needs-test-4.8-rc3
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Title:
[Lenovo Thinkpad T460] Ultra
This issues seems to have the same source as bug
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1376581
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Title:
[Lenovo Thinkpad T460]
I have the same problem with an Lenovo X1 Carbon 3 and Ultradock.
Upgrading the kernel to 4.6.5 mainline fixed it, although the laptop
refuses to suspend while attached to the dock.
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So, I tried http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.6.4/ and
switching to external display and back multiple times, including
suspend/resume cycle works flawlessly. Unfortunatly, I am unable to
remount my XFS root writable (had to change initrd option) and compile
the ZFS DKMS files. So,
I am using a T460s with an external DVI monitor connected via a docking
station, and experience the same issue. People here
https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-
intel/+bug/1522922 report it is fixed in mainline kernel
I tried http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.4.14-xenial/
and just docking the notebook leads to kernel panic, after the same
error message (Too many voltage retries...) appears. So, no luck with
mainline kernel. Ill try vanilla and give feedback.
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I am using a T460s with an external DVI monitor connected via a docking
station, and experience the same issue. People here
https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-
intel/+bug/1522922 report it is fixed in mainline kernel
Exactly the same (and some more) problems are on my Lenovo X250
Broadwell machine with 4.4 kernel. I have tested 4.6.0, 4.6.3 and just
now 4.7-rc6. All issues disapeared.
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** Tags added: needs-test-4.7-rc6
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Title:
[Lenovo Thinkpad T460] Ultra Dock external displays not detected after
suspend/resume cycle
To
As per my previous comment, 4.6.0-040600-generic #201606030904 is not
effected by this bug. I've been using it for a month without issue.
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Title:
Ryan, to follow up, did the 4.6.0 kernel show the issue?
Also, to keep this relevant to upstream, could you please test the
latest mainline kernel (4.7-rc6) and advise to the results?
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I wasn't able to boot 4.6.1, but I was able to boot 4.6.0-040600-generic
#201606030904. It does not seem to have the screen detection or freezing
issues experienced in 4.4.0 when docking/un-docking (yet).
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Ryan, to see if the improvements have already made it to mainline, could
you please test the next most latest mainline kernel (4.6.1) and advise
to the results?
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The 4.7-rc1 kernel was not bootable on my system. However, I have been
testing with 4.6.0-996-generic #201605082201 from drm-next and the
behavior is better. With the drm-next kernel, I am able to dock/undock
the laptop multiple times without a freeze and the displays are
recognized and can be
Ryan, to help narrow this down, could you please test the latest
mainline kernel (4.7-rc1) and advise to the results?
** Tags added: latest-bios-1.10
** Tags added: kernel-bug-exists-upstream-4.6-rc4
** Changed in: linux (Ubuntu)
Status: Confirmed => Incomplete
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I have noticed fewer freezing issues on docking, and a complete resolve
of this bug after installing the Intel SKL GuC firmware blob; along with
running a drm-next or drm-next-intel kernel. The GuC blob seems to be
missing from linux-firmware, I no longer receive error messages about
missing i915
I have been running the BIOS 1.10 since the day it was released.
Behavior between 1.09 and 1.10 related to this bug did not change.
R06ET36W (1.10 )
03/23/2016
** Changed in: linux (Ubuntu)
Status: Incomplete => Confirmed
** Tags removed: bios-outdated-1.10
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