Thinkpad T440s freezes with 2nd monitor via dock

madevr · 2013-11-18 16:30:52

Hi there - I have a strange problem with my Thinkpad T440s:

Connecting a 2nd monitor directly (VGA) works like a charm, however putting the Thinkpad into the docking station (with the 2nd monitor connected to the dock) freezes the system. Without the 2nd monitor the dock is working fine. When booting with the 2nd monitor connected to the dock, both screens stay black as soon as the kernel loads.

Is this a known problem / any ideas? Can I somehow help fixing this problem?
I know that I'm not the only one since I have found other people reporting this here: http://thinkpad-forum.de/threads/165520 … -und-Linux
They also provided an xorg.log (http://pastebin.com/Qk7nHVwt) which shows nothing suspicious, I guess...

Last edited by madevr (2013-11-18 16:32:21)

minus7 · 2013-11-22 20:51:23

Same issue with my T440p. Happens with VGA, DP & HDMI (haven't tested DVI) on the dock. Undocking unfreezes it. If X is running the X server freezes and consumes 20% CPU, if none is running a kworker process does that. Even with no monitor attached it will freeze when the builtin monitor wakes up from sleep (again, undocking helps).

Here's a stack trace from the frozen X (^C'd while it was frozen from waking up the display, gdb only reacted again after undocking):

#0  0x00007fe972febf87 in ioctl () from /usr/lib/libc.so.6
#1  0x00007fe973eb19d4 in drmIoctl () from /usr/lib/libdrm.so.2
#2  0x00007fe971aadc26 in ?? () from /usr/lib/xorg/modules/drivers/intel_drv.so
#3  0x00007fe971aae8dd in ?? () from /usr/lib/xorg/modules/drivers/intel_drv.so
#4  0x00000000004aa031 in xf86DPMSSet ()
#5  0x00000000004aa10a in xf86SaveScreen ()
#6  0x000000000046568d in dixSaveScreens ()
#7  0x0000000000561ee6 in mieqProcessInputEvents ()
#8  0x0000000000474119 in ProcessInputEvents ()
#9  0x00000000004371b2 in ?? ()
#10 0x00000000004269ea in ?? ()
#11 0x00007fe972f2fbc5 in __libc_start_main () from /usr/lib/libc.so.6
#12 0x0000000000426d31 in _start ()

Edit: "Solved" by returning the laptop. This issue plus the loud (and not well-controllable) fan and the lack of support for the fingerprint sensor (different from previous ThinkPad models, it's from Validity Sensors) just aren't worth the trouble.

Last edited by minus7 (2013-11-26 21:31:22)

EliteGreg · 2013-12-06 14:05:36

Just an FYI. I'm running Ubuntu 13.10 and have the same problem with my Thinkpad L440 (intel graphics) and the Thinkpad Pro Dock. All connectors for graphics on the dock cause the machine to hang but I can still ssh into it. If I ssh and run xrandr, it hangs for several minutes then completes, and often, at that time, the docked monitor works. It seems to be an issue with the intel graphics kms driver.

Tasqa · 2013-12-10 23:23:22

I'm having the same problem...
I googled around for a bit and found this bug report: https://bugs.freedesktop.org/show_bug.cgi?id=71267
It probably is the one you guys are experiencing as well.

falstaff_ch · 2014-01-09 21:52:32

I have this issue too.

There is an open issue at the Freedesktop Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=71267

Sorry, just noticed that his link is already here :-)

Last edited by falstaff_ch (2014-01-09 21:53:19)

jnhieber · 2014-01-18 10:34:53

I compiled linux-mainline with this patch, but my system doesn't even boot.
has anybody got this working? if so, which kernel/patch/inteldriver did you use?

xinfin · 2014-01-23 10:14:54

I have the same issue.

Has anybody been able to solve this issue?

Thanx

jnhieber · 2014-01-24 16:58:42

No, the only thing you can do is watch this bugreport for changes: https://bugs.freedesktop.org/show_bug.cgi?id=71267
I think the people with the required knowledge to fix is and who have such problem are getting more and now the weekend is here, so lets hope this will be fixed soon

sjakub · 2014-01-31 07:27:08

I am also experiencing this, on T440p.
For now I am using my laptop docked, but the external screen connected
to DP port on the laptop (using DP-DVI adapter) instead of one of the docking station's ports.
It works fine this way.

Arch Linux

#1 2013-11-18 16:30:52

Thinkpad T440s freezes with 2nd monitor via dock

#2 2013-11-22 20:51:23

Re: Thinkpad T440s freezes with 2nd monitor via dock

#3 2013-12-06 14:05:36

Re: Thinkpad T440s freezes with 2nd monitor via dock

#4 2013-12-10 23:23:22

Re: Thinkpad T440s freezes with 2nd monitor via dock

#5 2014-01-09 21:52:32

Re: Thinkpad T440s freezes with 2nd monitor via dock

#6 2014-01-18 10:34:53

Re: Thinkpad T440s freezes with 2nd monitor via dock

#7 2014-01-23 10:14:54

Re: Thinkpad T440s freezes with 2nd monitor via dock

#8 2014-01-24 16:58:42

Re: Thinkpad T440s freezes with 2nd monitor via dock

#9 2014-01-31 07:27:08

Re: Thinkpad T440s freezes with 2nd monitor via dock

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