Hi, I bumped into this issue when doing install tests under jenkins, and can confirm that the dpms=false setting does not disable the screen blanking on e.g. debian-8.4.0-amd64-netinst.iso
It seems that Xorg now has a -s option: -s # screen-saver timeout (minutes) setting this to 0 appears to have solved the problem, by disabling screen-blanking for the graphical install. It's possible to work around this problem (in a somewhat kludgy manner) by NOT setting dpms, and instead adding this to the command line/preseed: preseed/early_command="echo DPMS=-s\\\\ 0 > /lib/debian-installer.d/S61Xnoblank" (the \\\\ is probably an artefact of the way that I'm specifying this in a ruby script, inside single quotes, so you probably only need a couple of backslashes -- whatever it takes to get '-s\ 0' into the file. This works because it sets the DPMS environment variable which then gets used as is in the Xorg command line as long as dpms is not also set on the kernel command line. In order to make the dpms stuff work again in future versions I'd think that screen-blanking is really not helpful during install, so would set DPMS="-s 0" or perhaps DPMS="-s 0 -dpms", by default, and also make it so that is what's set when dpms=false is specified. Cheers, Phil. -- |)| Philip Hands [+44 (0)20 8530 9560] HANDS.COM Ltd. |-| http://www.hands.com/ http://ftp.uk.debian.org/ |(| Hugo-Klemm-Strasse 34, 21075 Hamburg, GERMANY
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