I have a machine that I don't want the screen to go blank when on AC. I set both of these:
In the Screensaver applet, "Activate screensaver when computer is idle" and "Lock screen when screensaver is active" are both unchecked.
In the Power Management applet, under On AC Power, "Put display to sleep when inactive for" is set to Never.
The screen still goes blank after 15 minutes. There is no setting in the BIOS that would blank the screen. Does anyone have any ideas?
Install Caffeine and, on those occasions when you are not using the keyboard or mouse for extended periods, but still want the screen to remain active (like when you are watching a video), enable Caffeine. While it is enabled, your screen is unable to go blank.
When you start Caffeine, it sits in your system tray. So, enabling/disabling it is a mouse right-click away
I appreciate the Caffiene recommendation, but I'd rather not have to install another utility. I'd rather that it work as intended, and if there's a specific component we can narrow it down to, I can file a proper bug report.
Some more information: if I reboot, log in, the screen blanks out at 10 minutes. If I wake the machine up, the screen does not seem to blank out again. I'm leaving the machine running to see if it will do it again.
Ok, so it looks like the screen blanks 10 minutes after login, then after I wake it up, the screen does not blank again. Where can I log a bug?
Logged a bug here:
I've been unable to replicate this bug across multiple machines, very frustrating. Maybe it was a fluke.
I had a similar problem. I found entering "xset -dpms" at a terminal prompt corrected it - at least until I rebooted. It seems like there should be a settings dialog that does the same thing but I have never found it.
Bill