[Bug 41561] [r600 KMS] Hotplug detect does not work for HDMI monitor on Fusion E-350 board

bugzilla-daemon at freedesktop.org bugzilla-daemon at freedesktop.org
Fri Oct 7 09:07:41 PDT 2011


--- Comment #2 from Simon Farnsworth <simon.farnsworth at onelan.co.uk> 2011-10-07 09:07:40 PDT ---
drm_helper_hpd_irq_event() isn't generating uevents, because connector->status
is not being updated somewhere, and is remaining at connector_status_connected,
when it should be being updated to connector_status_disconnected.

If I do cat /sys/class/drm/card0-HDMI-A-1/status, I see the status is
"disconnected", but something resets it by the time the helper comes back
round. Possibly connected to the following from dmesg:

# cat /sys/class/drm/card0-HDMI-A-1/status ; dmesg -c
[16791.042128] [drm:radeon_atombios_connected_scratch_regs], DFP1 disconnected

# sleep 10 ; dmesg -c
[16799.522394] [drm:radeon_atombios_connected_scratch_regs], DFP1 connected
[16799.522407] [drm:output_poll_execute], [CONNECTOR:15:HDMI-A-1] status
updated from 1 to 1
[16799.524465] [drm:output_poll_execute], [CONNECTOR:17:VGA-1] status updated
from 2 to 2

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