My desktop at work is CentOS 3.8, using the motherboard's onboard Intel 865 (82865G) graphics controller. Most of the day today I've been having sporadic instances where the screen simply goes black for about 2 seconds. It has nothing to do with whether I'm using the mouse or keyboard (or not) and the delay before it comes back on is not correlated to whether I *continue* to use the mouse or keyboard. This has happened a few times before. Sometimes the system is up for weeks at a time without showing any sign of this, sometimes it re-appears every few days. I've tried shutting down and restarting X11, but that doesn't get rid of it -- it seems only a full reboot will do so. And the longer I wait to reboot, the more often it happens. It doesn't seem to be related to the clock or to ntp (I've seen ntp clock syncs trip the screen saver in X11 before), I've tried shutting down ntpd without any change in the behavior and the system clock is not drifting from other machines on the LAN either way. There's nothing in the log files indicating any activity that might be connected. Anyone have a clue where I might begin looking? Having to reboot a linux machine with only 6 days of uptime galls me.
It might be your monitor, try using a new monitor. HTH Oliver Bart Schaefer wrote:> My desktop at work is CentOS 3.8, using the motherboard's onboard > Intel 865 (82865G) graphics controller. Most of the day today I've > been having sporadic instances where the screen simply goes black for > about 2 seconds. It has nothing to do with whether I'm using the > mouse or keyboard (or not) and the delay before it comes back on is > not correlated to whether I *continue* to use the mouse or keyboard. > > This has happened a few times before. Sometimes the system is up for > weeks at a time without showing any sign of this, sometimes it > re-appears every few days. I've tried shutting down and restarting > X11, but that doesn't get rid of it -- it seems only a full reboot > will do so. And the longer I wait to reboot, the more often it > happens. > > It doesn't seem to be related to the clock or to ntp (I've seen ntp > clock syncs trip the screen saver in X11 before), I've tried shutting > down ntpd without any change in the behavior and the system clock is > not drifting from other machines on the LAN either way. There's > nothing in the log files indicating any activity that might be > connected. > > Anyone have a clue where I might begin looking? Having to reboot a > linux machine with only 6 days of uptime galls me. > _______________________________________________ > CentOS mailing list > CentOS at centos.org > http://lists.centos.org/mailman/listinfo/centos-- Oliver Schulze L. Get my e-mail after a captcha test in: http://tinymailto.com/oliver
On 9/6/06, Bart Schaefer <barton.schaefer at gmail.com> wrote:> been having sporadic instances where the screen simply goes black for > about 2 seconds. It has nothing to do with whether I'm using the > mouse or keyboard (or not)Just in case anybody was paying attention to this ... Evidently the blanking has something to do with the machine being on a KVM switch with another computer (which happens to be a Mac Mini, but that doesn't seem to be relevant as it was powered off). I thought I had ruled out the KVM before I posted the first time -- among other things, why would rebooting the linux machine fix a failure in the KVM? -- but the problem has not recurred since plugging the monitor directly into the computer. This isn't 100% conclusive because I've gone days or weeks without this happening in the past, but it's the first time I've gotten the problem to go away without rebooting.