I installed Debian 7 on an Asus Eee PC 2101HA.Sometimes the screen goes black for 1 second.My VGA card is VGA compatible controller: Intel Corporation System Controller Hub (SCH Poulsbo) Graphics Controller (rev 07)
Occasional screen blackouts on Debian 7
debian;video;graphic card
There are several Intel drivers options which, if they don't work perfectly with your hardware, can cause issues like this:The big one is lvds_downclock, but it defaults to off. If you've changed that default, that's the first one to try. (It's possible some kernel versions defaulted to on, so its worth a try to force-disable it).i915_enable_fbc can cause various display issues. The default is per-chip, you may want to try turning it off.Both of the above will probably increase power usage a little.Finally, powersave defaults to true, turning it off will disable a bunch of powersaving stuff at once. This will probably work, but you'll notice the battery life hit.There are two ways to set these values:On the kernel command line, like this: i915.i915_enable_fbc=0. Yes, you need the i915. prefix, even when the option name starts with i915. You can test temporarily by editing the command line in GRUB before booting, and set permanently in the grub config (edit /etc/default/grub, then run update-grub. Or dpkg-reconfigure grub-pc).Create a new file in /etc/modprobe.d, for example /etc/modprobe.d/local-i915.conf. Then inside it, put options i915 i915_enable_fbc=0 lvds_downclock=0 (etc.). Note that you do not use the i915. prefix here. After editing, run update-initramfs -u.Another option is to try a newer kernel. Currently, Debian Backports has 3.12. Newer kernels have fixed a lot of bugs in the Intel video driver, and also have better knowledge of when which hardware particular powersaving features work on.