Monitor and Keypad, Acer Aspire Laptops and Minor Ubuntu Trouble
My problem with BOTH laptops was the numeric keypad. Neither one worked quite right. If NumLock was off, the keys did what was intended by themselves. 1 performed End, 3 did a Pg Dn, 7 went Home, and 9 did a Pg Up. However, hitting Shift and 1 (Shift End) did NOT hightlight everything to the end of the line, it instead typed a 1. This was no good.
I fixed it before Christmas (2012) but now in January I have a new laptop. The Acer Aspire 5517 I had now belongs to a young lady who is staying with my family. I recently acquired an Acer Aspire 7750 (it was my wife's) and after a clean Ubuntu 12.04 install, I realized that my Number Pad was again messed up. Also, the brightness buttons (Fn + Left or Right arrows) didn't work. My battery doesn't last long since I'm running the screen at just under the "Sun" setting.
To fix the number pad, I edited /etc/default/keyboard so that the
line now reads
After a reboot, I'm all set. I had to google a bit the second time around, as I couldn't remember what I did on teh 5517. Fotunately, at least knew which file I edited because my backed up bash_history had vi /etc/default/keyboard in it.
The display though worked fine on the 5517. The 7750 had issues though. Hitting Fn and the Left or Right arrow key didn't do anything to the brightness, even though I did see a brightness indicator going up and down when I tried it. To fix this, I edited /etc/default/grub and changed the line that said:
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash backlight=vendor acpi_osi=Linux"
then I did a sudo update-grub followed by a sudo grub-install /dev/sda. I recommend rebooting, though I don't remember if it was necessary or not.