https://bugs.freedesktop.org/show_bug.cgi?id=29941
Summary: radeon/KMS: Screen hotplugging does not work any more Product: DRI Version: DRI CVS Platform: x86-64 (AMD64) OS/Version: Linux (All) Status: NEW Severity: normal Priority: medium Component: DRM/Radeon AssignedTo: dri-devel@lists.freedesktop.org ReportedBy: direx@betriebsdirektor.de
I noticed that in recent kernel versions the runtime detection of newly added monitors does not work properly.
When I plug in my TV (DVI2HDMI) after booting I cannot enable it. xrandr correctly shows a new screen and I can even enable the output, but the TV screen stays black. Restarting X does not help.
The driver also seems to recognize the port status after plugging it in (/sys/class/drm/card0-DVI-I-2/status) changes from "disconnected" to "connected".
When I plug the HDMI cable in _before_ booting my computer the TV works just fine.
GFX: Radeon HD 3870 Linux: 2.6-git (issue appeared in 2.6.35) with KMS Mesa: git libdrm: git xf86-video-ati: git