Created attachment 93654
Photograph showing green pattern overlays
Output on an external display connected with HDMI to dock when patch
92883 is applied. This also appeared once with patch 91164. But wasn't
noticed until now with patch 93653.
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Created attachment 93653
[PATCH]HDMI connection via dock works with some (random) delay
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https://bugs.launchpad.net/bugs/1275794
Title:
Lenovo T440s freezes when connected to docking st
I tried Agner's train delay patch
(https://bugs.freedesktop.org/attachment.cgi?id=92883) with the recent
linux-3.13.2 and had partial success with a HDMI connection. My rig
includes T440s with a ThinkPad Ultra Dock. As noted by others, the
display is not instantly turned on; it takes about ~30 se
This post http://forums.lenovo.com/t5/T400-T500-and-newer-T-series
/T540p-T440p-UltraDock-external-display-
issues/m-p/1428373/highlight/true#M92038 suggests that there is a
problem with the Thinkpad dock's firmware.
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Created attachment 93972
dmesg-jani-patches-undocked.txt
dmesg output from drm module with changes proposed by Jani while the
computer was booted while undocked. The computer is then docked and the
display spilt using xrandr.
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(In reply to comment #131)
> From the kernel perspective it's fixed when we don't freeze the machine even
> when a dock with buggy firmware is connected, which is what my patches fix.
>
> Plus we need to follow-up on comment #125.
Jani, my earlier comment was a false alarm. My apologies. I conf
(In reply to comment #132)
> I have got the following devices:
>* T440s (Kernel 3.13.2)
>* Dock (fw2.10)
>* Dock (fw2.17)
>
> If I can provide additional logs, please give me infos on which scenarios
> (/patches).
Apply the patches from this thread:
http://thread.gmane.org/gmane.comp.
(In reply to comment #115)
> I tried applying the two patches which you posted on intel-gfx[1], ported to
> 3.13.
>
> [1] http://article.gmane.org/gmane.comp.freedesktop.xorg.drivers.intel/33737
>
> Using a T540p and an Ultradock, connected to a Dell U2410 via a DisplayPort
> cable --- and it wor
Created attachment 93971
dmesg-jani-patches-docked.txt
dmesg output from drm module with changes proposed by Jani while the
computer was booted while docked.
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