Ask Ubuntu is a question and answer site for Ubuntu users and developers. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

In the past, I just plug in hdmi, then boot laptop, and I have display on tv. Today my tv reads as "No Signal". When I go into "sound" on dashboard, there is No HDMI option. I don't understand what could have changed in the past few days. I also have Windows 7 on this machine, and I have same issue on there as well. In Ubuntu I scanned for drivers, and it asked if I wanted to activate HDA driver for DKMS. I'm not sure what that is. I googled and it looks like an audio driver. In Windows, Its says driver is up to date.

share|improve this question

If you have the same issue in Ubuntu as well as Windows than it is highly unplausible that it is a software issue.

Check your BIOS settings and if they are OK you might have a hardware failure.

share|improve this answer

Well I fixed it, and why this worked, I have no idea. I went into Windows, device manager, device adapters, and disabled then re enabled my intel graphics. I then booted into ubuntu, and hdmi worked perfectly again.

share|improve this answer

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.