I couldn't make the commit bisect work yet. But I've realized one thing and I think it's an important one and maybe a workaround for this issue: I booted up the laptop with no HDMI cable connected to the HDMI output and I've tried to execute the xrandr command and the HDMI output was there. So, I've connected the cable, turned on the external screen and it worked fine.
So, I think that after executing the Ubuntu updates, the HDMI output is gone only if the laptop is booted with the HDMI cable connected in the HDMI output. I'll try to boot the laptop with and without the HDMI cable connected to confirm this point as soon as possible. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1496697 Title: HDMI output gone after completing ubuntu updates To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1496697/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
