Red Hat Bugzilla – Bug 123879
Display blanks when keyboard / mouse are being used (dpms?)
Last modified: 2007-11-30 17:10:43 EST
From Bugzilla Helper: User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.6) Gecko/20040207 Firefox/0.8 Description of problem: When 'Display power management' is enabled in the KDE control centre, the display blanks and puts the monitor into standby at seemingly random times. This happens even when the mouse / keyboard are in use. Switching off display power management solves the problem, but obviously also disables dpms functionality. I'm using the binary nVidia drivers, and a vanilla 2.6.6 kernel with acpi compiled in. This was not a problem in Fedora Core 1 with KDE 3.2.2 installed from the rpms on www.kde.org, and the same 2.6.6 kernel. Version-Release number of selected component (if applicable): kdebase-3.2.2-4 How reproducible: Always Steps to Reproduce: 1. Switch on 'Display power management' in KDE Control Centre 2. Use keyboard and mouse (in a normal manner) 3. Display blanks and goes into standby 4. Moving mouse or keyboard wakes monitor again Additional info:
Please duplicate the bug with the "nv" driver. If you can then add to this bug if you cannot then let Nvidia know instead.
The problem persists when using the 'nv' driver.
Can you boot with the options acpi=off apm=off and see if it still occurs ?
Still happening after booting with: /bzImage acpi=off apmd=off Screen blanked exactly 20 minutes after X started. In KDE control center, settings are: Standby after: Disabled Suspend after: 30 min Power off after: Disabled
This appears to be a bug exclusive to KDE. It doesn't happen when logging in to Gnome. This problem occurs for me with the nv driver and the standard kernel shipped with FC2. I have DPMS set to Standby after 60 minutes in the KDE Control Centre, and the screen blanks 30 minutes after logging in, then again 10 minutes later. After that it doesn't seem to happen until the next login.
FYI, I also see this with the mga driver (Matrox Millenium G200 AGP). This is a 2-way system (Abit VP6) -- kernel 2.6.5-1.358smp booted with 'acpi=off apm=power-off noapic vga=775'.
This appears to be an xorg bug. I found that adding some DPMS options to the ServerLayout section solved this problem for me. Please see: https://freedesktop.org/bugzilla/show_bug.cgi?id=792
https://bugs.freedesktop.org/show_bug.cgi?id=1934 <- this should resolve the problem.
This is fixed in xorg-x11-6.8.2 in rawhide, which will also be released as an update to Fedora Core 3 soon. Please upgrade to Fedora Core 3, and apply this update once it is available. Setting status to "RAWHIDE".