Bit of playing... From what I can make out, DPMS isn't being set on, or
is being ignored on some boots by the driver.
If I ssh into the laptop (while screen is off) and issue:
#sudo vbetool dpms on
the screen then turns on.
As a quick&dirty fix for this, I did the following:
Edit the file
/etc/gdm/Init/Default
Scroll to the bottom of the file, and before the line "exit 0" and after
the last "fi" entry, add:
/usr/sbin/vbetool dpms on
Save and exit, reboot.
Seems to work fine now, I've done about a dozen or so reboots, each time
the display comes on as it's supposed to do!
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https://bugs.launchpad.net/bugs/682287
Title:
Black Screen at Start
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