https://bugs.freedesktop.org/show_bug.cgi?id=99779

Bug ID: 99779 Summary: Lenovo Thinkpad E450 (Kaveri A6-7000 Radeon R4) Blank Screen after suspend (displayport link issues) Product: DRI Version: XOrg git Hardware: x86-64 (AMD64) OS: Linux (All) Status: NEW Severity: critical Priority: medium Component: DRM/AMDgpu Assignee: dri-devel@lists.freedesktop.org Reporter: brookskd@gmail.com

Created attachment 129527 --> https://bugs.freedesktop.org/attachment.cgi?id=129527&action=edit dmesg 4.9.8

If I shut my laptop lit it suspends, then when opening the lid and resuming I get a blank screen and am unable to get the display to work again unless I reboot. I can ssh into computer and I get displayport link errors in the attached dmesg log.

This issue does not occur if I use the radeon kernel module instead of amdgpu.

This seems very similar to bug 90320 but I filed this one because it is amdgpu not radeon: https://bugs.freedesktop.org/show_bug.cgi?id=90320

I've also attached the Xorg.0.log but it does not have any errors indicated. It indicates successful exit because I stopped the server over ssh and tried to restart gdm a few times which is why there are multiple displayport link status failed messages in dmesg.