Re: Panel hangs X server on APM resume (?)

[jg pa dec com (Jim Gettys)]

The cause of this is your BIOS's need to access the registers of your
display controller during the power down/resume sequence interfering
with the X servers need for those registers to not get messed with
behind its back.

On many graphics chips, this causes chaos, up to and including freezing
the machine completely.  On some, it is benign, and doesn't bother anything.

Solution:

Arrange to switch to a text console as part of the power down sequence,
and move back to the X server at the end of resume.

On recent RedHat systems, part of the scripts invoked can do this
automatically by a trivial edit documented in the scripts; and I believe
recent XFree86 servers may do this on their own.  Why they didn't make
this the default behavior is beyond me...

But this is the cause of your trouble. (above and beyond whatever brain-damage
your hardware may have with power management).
				- Jim


--
Jim Gettys
Technology and Corporate Development
Compaq Computer Corporation
jg pa dec com