Would like to join in on this bug. I have a laptop with Intel Haswell and AMD Radeon HD 8850M / R9 M265X. I can't change to the dedicated GPU no matter how I try. My error messages in dmesg are basically the same as mentioned above. Also, when I stop lightdm I get the title error: [drm:si_resume [radeon]] *ERROR* si startup failed on resume. Using DIS on vgaswitcheroo file just gives me a black screen. I am on Ubuntu 16.04. Tried with the Grub parameters mentioned and without them. Still have the issue.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1581270 Title: Hybrid Graphics: [drm:si_resume [radeon]] *ERROR* si startup failed on resume To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1581270/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
