*** This bug is a duplicate of bug 1742602 *** https://bugs.launchpad.net/bugs/1742602
Update 1: It looks like Dell Inspiron 15 indeed has some hybrid Intel/Radeon graphics but it was not clear to me at the beginning. Update 2: After fresh install of Ubuntu 20.04 (kernel: 5.4.0-33-generic) the problem still persists. While I was on 18.04 I have discovered another error in syslog, which may or may not be related: radeon 0000:08:00.0: failed VCE resume (-110). I have disabled VCE by following this advice (https://forum.manjaro.org/t/radeon-vce-init-error-110-hybrid-graphics/38845/7), the error log disappeared but the problem with blank screen was not fixed. Any advice on how to investigate it further? -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1574617 Title: External monitor keeps going blank To manage notifications about this bug go to: https://bugs.launchpad.net/unity/+bug/1574617/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs