Comment 9 for bug 1308674

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Roger Kind Kristiansen (rogerkk) wrote :

I just tried this with kernel 3.13.0-34.60 and I'm still experiencing the problem. Brightness set to minimum and not adjustable after undocking.

I originally encountered another (duplicate?) bug post which suggested to upgrade the x220's BIOS, so I'm also running the latest BIOS version (8DET69WW / 1.39). The possible duplicate is at https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1348550?comments=all