Issue resolved by updating to the latest BIOS 1.16. Tested Ok on Acer aspire 4315 using Ubuntu 11.04 and PClinuxOS KDE 2011 09.
Notes: I'm able to reproduce the problem with the old BIOS 1.08. Only Ubuntu 8.10 worked Ok for me using the old BIOS, see http://www.hbclinux.net.nz/acer4315-810.html
Issue resolved by updating to the latest BIOS 1.16. Tested Ok on Acer aspire 4315 using Ubuntu 11.04 and PClinuxOS KDE 2011 09.
Notes: www.hbclinux. net.nz/ acer4315- 810.html
I'm able to reproduce the problem with the old BIOS 1.08.
Only Ubuntu 8.10 worked Ok for me using the old BIOS, see http://