Messages in this thread | | | Date | Mon, 23 Mar 1998 02:58:14 -0400 | From | "Garst R. Reese" <> | Subject | Re: Laptop APM failure |
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"C. Scott Ananian" <cananian@lcs.mit.edu> wrote: Date: Mon, 23 Mar 1998 00:13:08 -0500 (EST)
Perhaps windows is using VESA screen blanking instead of APM screen blanking?
A perusal of the linux code seemed to indicate that VESA blanking would be attempted if APM blanking failed, but perhaps I wasn't reading as carefully as I should have been? --Scott Vesa unblanking gets called regardless because the VESA routines are used to get the right stuff back to the right console. I tried changing to only get called if APM unblank failed, and got some weird screens :) I also fiddeld with the time of the console blank interval and the BIOS blank time to figure out what was blanking the X screen but not turning off the back light. It is clearly the VESA stuff, indicating that APM is failing, but I do not get an error msg. with Ox0100 setting. If X is not running at all, APM works great, but if X is running and I'm on a non X vc, the backlight goes off, but comes back on after a few minutes. Have not tried upgrading X yet. (BIG DOWNLOAD). I don't do windows anymore, but when I did it worked fine. I do think that some of the problem may be in the vesa code rather than the apm_bios.c code. Guess it time to bite the bullet on X. -- Garst
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