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My system was working fine. Then, I upgraded from Fedora 9 to 13. Now the system sets a scan range outside of what the monitor can handle when it hibernates. I copied /etc/X11/xorg.conf from the Fedora 9 installation. I added a monitor section with horizontal and vertical frequency ranges. Xorg restarts faster, but the problem is unchanged.
CTRL-ALT-BS doesn't recover the system. CTRL-ALT-F2 doesn't give me a viewable text screen. I can ssh in and "killall Xorg".
The monitor is an 11 year old Vivitron 17 CRT.
I'm using the on board video.
I'm using version: X.Org X Server 1.8.2
OS: Fedora 13 with KDE desktop
To my experience most of the times I've seen "out of range" warnings have been when the monitor is simply not receiving any video signal at all.
The default restart combination in X has been changed to alt+sysreq+k, because the previous combination was considered too easy to accidentally hit on some keyboard configurations. It's possible to set it back if you want, but the details may vary across distros. Here's a page about it in F11.
This is not very helpful, but I used to have a similar problem years ago, I think I was using Fedora 8. If I remember correctly, I think I upgraded my graphics card, and the problem started... You say it only comes up when it hibernates? What about when the screensaver turns on?
When the screen saver comes on, the screen just goes blank. That's the screen saver that set. It's after the system tries to hibernate the monitor that the monitor complains the signal is out of range.
KDE on Fedora 13 doesn't appear to have any bindings set for reset X server. It did let me set CTRL+ALT+BS, but not CTRL+ALT+SysReq. I haven't tested it yet because I have to leave the system alone for awhile.
chvt complains that it can get a file descriptor for the console if I'm not root. I don't want to give an account unpassworded sudo. I guess I could train myself to CTRL+ALT+F2 before I leave the system. It may be easier to find an other distro or go back to Fedora 9.
I'm not deliberately hibernating the system. It hibernates after not being used for a while. Unlike a lap top, it's only hibernating the monitor. It should just drop the sync pulses, but it appears to be changing the timing instead.
Hibernation already requires root access, so if you just wrap the script, chvt will be executed by root. And even if it were not so, you could give unpassworded sudo for this specific command, not for all commands.