[CentOS] DPMS or hardware

Sam Drinkard sam at wa4phy.net
Fri Sep 23 18:33:58 UTC 2005


    I've been bugged by the fact that the dpms function will not work on 
this machine, and perhaps now I have some clue as to why.  Looking at 
the Xorg.0.log, I see where "Open APM failed (/dev/apm_bios) (No such 
file or directory)" which tells me perhaps this is the reason why it 
won't turn off the monitor.  Also, this line prior to the other. 
`fonts.dir' not found (or not valid) in 
"/usr/X11R6/lib/X11/fonts/local/".  That part I can maybe fix, but I 
have no clue what should be in the /dev/apm.  The only thing that will 
happen is the monitor will go into screeensaver mode, or if no saver 
selected, it will do nothing, not even blank. 

    What should the /dev/apm contain?  Where does it pick up the info as 
to what should be in there, from a probe of the hardware?  That said, 
does the fact that I'm using a custom video driver from ATI make any 


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