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HDMI not working on Lenovo Thinkpad T14 with Ubuntu 18.04

rated 0 times [ 0] [ 0] / answers: 1 / hits: 4428 / 3 Years ago, tue, may 25, 2021, 4:26:02

After trying out the suggestions here, which did not solve my issue, I decided to ask the question:

I have a freshly installed Ubuntu 18.04 LTS on my Thinkpad T14, but I can not connect to an external monitor via HDMI cable. I tried it with 2 different displays so the source of the problem should be on the laptop side.

Can someone help me out solving it? Thanks in advance!

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bunsistent

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answered 3 Years ago berlorful · Accepted Answer

I have solved it by updating to a new kernel. Ubuntu 20.04 LTS comes with a Kernel 5.4.0 which was problematic both for HDMI and also screen brightness adjustment in my case.

Solution: I simply updated to a newer Kernel, (5.9.0 in my case) and those issues were solved without any additional step required. I hope this helps many others who are disappointed at the moment and reading this page.