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Public bug reported:

I am running Kubuntu 9.04 Jaunty amd64 on 2.6.28-15-generic.  I have a
an AMD 3000+ with VIA K8V motherboard and an ATI 9800 Pro AIW graphics
card (R350 graphics chip) connected to an Samsung 192MP LCD over DVI-0.
Xorg.0.log indicates X server 1.6.0 is loading
/usr/lib/xorg/modules/drivers/radeon_drv.so version 6.12.1.

I choose Kickoff > Leave > Sleep ("Suspend to RAM") to send  my computer
to sleep.   Sometimes (about 6 times out of 25 resumes) when I press the
computer's power button to resume from sleep, the display does not re-
enable.  The computer's LED comes on, its fan starts, I hear some drive
noises.  BUT the screen remains dark, no cursor.  Pressing Ctrl+Alt+Del,
Ctrl+Alt+F1, and/or the power button all do nothing.  The only way out
is to hold down the computer's power button to force it to power-off,
then power back on and boot.

When resume from sleep works, the LCD's LED stays on (which I think
indicates it's receiving a signal), a white I-beam text cursor appears
on a dark screen, and then when I press a key a password unlock dialog
appears.  Sometimes the screen around the dialog has a garbled pattern
(which sounds a bit like bug #293395), but everything looks fine when I
log in.

There *may* be a correlation with pressing keys while the system is
coming out of sleep.  I now wait until I see a cursor before pressing
any keys and it seems to help.  The problem may be related to this
Kubuntu (KDM? Plasma?) password screen at resume; I don't know how to
disable it.

Is there anything I can do to help debug this real but intermittent problem?  Is there any useful info left in logs after I reboot?  (https://wiki.ubuntu.com/DebuggingKernelSuspend suggests not.)  It sounds a bit like bug #339336 .
I used `ubuntu-bug -p xserver-xorg-video-ati` to submit this bug report which previously sent a bunch of system info somewhere.

** Affects: xserver-xorg-video-ati (Ubuntu)
     Importance: Undecided
         Status: New

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sometimes no video on LCD after resume from suspend
https://bugs.launchpad.net/bugs/425968
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