Sorry Christopher, I misread and by the time I read it correctly, apport
already sent the data.

I just unplugged and replugged the monitor on the front VGA. Then waited
a few seconds and plugged the monitor to the back VGA connector.

dmesg shows the following information:

[ 6613.913005] [drm:drm_edid_block_valid [drm]] *ERROR* EDID checksum is 
invalid, remainder is 92
[ 6613.913151] Raw EDID:
[ 6613.913183]          00 ff ff ff ff ff ff 00 10 ac 07 a0 4c 4b 34 30
[ 6613.913255]          04 0f 01 03 0e 29 1f ff ff ff ff ff ff ff ff ff
[ 6613.913333]          ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
[ 6613.913405]          ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
[ 6613.913484]          ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
[ 6613.913562]          ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
[ 6613.913633]          ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
[ 6613.913711]          ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
[ 6613.914978] [drm:radeon_vga_detect [radeon]] *ERROR* VGA-2: probed a monitor 
but no|invalid EDID

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https://bugs.launchpad.net/bugs/1565679

Title:
  No console/display output after boot

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