https://bugzilla.kernel.org/show_bug.cgi?id=44851
Summary: resume to black screen Product: Drivers Version: 2.5 Kernel Version: 3.5.0-3 Platform: All OS/Version: Linux Tree: Mainline Status: NEW Severity: normal Priority: P1 Component: Video(DRI - non Intel) AssignedTo: drivers_video-dri@kernel-bugs.osdl.org ReportedBy: energonic@gmail.com Regression: No
System: iMac 11,2 (mid2010) with AMD radeon 4670. kernel 3.5.0-3 used on ubuntu 12.10. No swap partition. Boot requires nomodeset on kernel command line, else black screen (even for text-only boot. Radeon module disconnects wrong display port).
Resume after suspend shows black screen, but reboots using Ctl-Alt-Del, so has resumed from suspend. Suspect kms invoked on resume and radeon disconnects wrong display port.
Same behaviour on archlinux using kernel 3.4.4-1.