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T420 random freeze

T400/T410/T420 and T500/T510/T520 series specific matters only
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Joined: Sun May 31, 2020 1:54 pm
Location: Ruhrgebiet, Germany

T420 random freeze

#1 Post by rkta » Sun May 31, 2020 2:13 pm

I have T420 running Debian stable which randomly freezes.

Years ago I created a dual boot with Debian and Win7. Running Debian I got
random freezes, running Win7 everything was ok. I then just bought another
ThinkPad and used this particular one only with Win7. Yesterday I decided to
give it another try, thinking the problem might be solved by newer software.

Running the current Debian stable I still get the random freezes. If I have
something with sound, e.g. a youtube video running, the last 1 or 2 seconds
will run in a loop after freeze. Connecting via ssh is not possible - it will

Since this never happened when using Windows, I assume it is a software
problem. I'm open to use another distro, but wanted to asked if something like
this is known.

Obviously searching the interweb nor the forum didn't help - but maybe I'm just

If I need to provide more information, just ask, please.

On a side note, when running, the laptop will also randomly eject the CD tray -
not sure if related.

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Re: T420 random freeze

#2 Post by shawross » Mon Jun 01, 2020 2:55 am

https://wiki.debian.org/InstallingDebia ... 420/jessie

Quick search bought up this and it could be a WIFI problem. Someone else might suggest another card.
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