Okay, I don't know in which kernel the bug exists or how to reproduce or fix it, but I know it's there. Sometimes switching between kernels from boot to boot enables external display to work with X (display cable connected all the time). Sometimes it needs several boots and kernel switches before it starts to work. And sometimes I have to change the state of the SATA ALPM to get it to work. But most of the time the display doesn't work, and I think the problem is connected to this error msg: "[drm:intel_dp_complete_link_train] *ERROR* failed to train DP, aborting". Maybe this issue causes some corruption in GPU's memory... Just in case I run memtest86 for main memory, and no errors found.
I've switched between precise's kernel linux-image-3.2.0-24-generic as also upstream kernel linux-image-3.4.0-030400rc4-generic. Sometimes external display works with both of the kernels and sometimes it doesn't work with either of them. I'm out of ideas after tens of dozens reboots. Can anyone confirm that HDMI out is (not) working out of the box? ** Tags removed: kernel-bug-exists-upstream -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/989226 Title: HDMI out doesn't work with ASUS Zenbook UX31E To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/989226/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
