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#1 2012-03-15 08:50:32

jumpfunky
Member
Registered: 2012-03-15
Posts: 17

video problems with Thinkpad T420s integrated intel graphics

I've the same bug as descriped here:
https://bugs.launchpad.net/ubuntu/+sour … bug/812638

What can i do? Can the fix also included in the archlinux kernel?

Kind Regards
Thorsten

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#2 2012-03-16 00:26:33

cfr
Member
From: Cymru
Registered: 2011-11-27
Posts: 7,178

Re: video problems with Thinkpad T420s integrated intel graphics

I'm suspecting I might have this issue too... Though it is hard to say as that bug report seems to cover a lot of different things. Are they all really the same bug? (Genuine question: I don't know how these things work.) I don't have issues on boot or suspend but I have a lot of problems with VGA connect and disconnect. And this is a fairly serious problem given how I use my laptop.


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#3 2012-03-16 08:31:05

jumpfunky
Member
Registered: 2012-03-15
Posts: 17

Re: video problems with Thinkpad T420s integrated intel graphics

After the recent intel driver update, my laptop also freeze when I connect an external display on the display port. I have to connect it first via VGA, than i can connect it via the display port by change the input source of my external display.

Last edited by jumpfunky (2012-03-16 08:33:28)

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#4 2012-03-22 17:24:19

jumpfunky
Member
Registered: 2012-03-15
Posts: 17

Re: video problems with Thinkpad T420s integrated intel graphics

I've identified the source of the freeze problem, but will open a different thread for it.

The problem decriped in the start post still exists.

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#5 2012-03-23 00:08:15

cfr
Member
From: Cymru
Registered: 2011-11-27
Posts: 7,178

Re: video problems with Thinkpad T420s integrated intel graphics

Could you post a link here? I can't seem to find the other post.


CLI Paste | How To Ask Questions

Arch Linux | x86_64 | GPT | EFI boot | refind | stub loader | systemd | LVM2 on LUKS
Lenovo x270 | Intel(R) Core(TM) i5-7200U CPU @ 2.50GHz | Intel Wireless 8265/8275 | US keyboard w/ Euro | 512G NVMe INTEL SSDPEKKF512G7L

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#6 2012-03-23 17:20:15

jumpfunky
Member
Registered: 2012-03-15
Posts: 17

Re: video problems with Thinkpad T420s integrated intel graphics

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#7 2012-06-26 20:34:53

delexi
Member
Registered: 2011-11-29
Posts: 13

Re: video problems with Thinkpad T420s integrated intel graphics

Does anyone have any further information on this issue. As it seems it is resolved in the Kernel used by Ubuntu since 2011-11-28. I don't know anything about the internals handling this, but would it be possible to apply the "Ubuntu patch" (see https://bugs.launchpad.net/ubuntu/+sour … ug/812638) to the arch kernel?

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#8 2012-07-30 22:00:42

wander
Member
Registered: 2012-03-03
Posts: 32

Re: video problems with Thinkpad T420s integrated intel graphics

Hello everybody,

by accident I stumbled upon this thread and I am quite happy that I am not alone with this issue. Since the fix mentioned in launchpad.net didn't solve the problem for me either I created a bugreport on the Kernel Bug Tracker some time ago.

https://bugzilla.kernel.org/show_bug.cgi?id=42873

Unfortunaltely this (very nasty) bug doesn't get much attention, so maybe you could submit some further information on bugzilla to raise the issue and get it fixed quickly.

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