https://bugs.freedesktop.org/show_bug.cgi?id=51042
Bug #: 51042 Summary: Turning off connector polling in drm_kms_helper inhibits HDMI hot plug Classification: Unclassified Product: DRI Version: XOrg 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: dargllun@gmail.com
When turning off connector polling in drm_kms_helper using the poll=N module parameter HDMI hot plugging does not work anymore. Quoting Alex Deucher:
See this discussion for details and some logs: http://comments.gmane.org/gmane.comp.freedesktop.xorg.drivers.ati/22107