some new findings from me (but still no solution for the default gutsy kernel):
the "acpi_osi=" appendix to the kernel line in grub is new in 2.6.22 and allows us to specify which OS should be pretended to the BIOS. By default in 2.6.22 (vanilla) it is !Linux, which means not-Linux. This was changed back to Linux in 2.6.23 but I don't know what's default in Gutsy. Guess this is the reason why it works in the other distros, sometimes with or without this option. So, now we have a tool to change the OS, and do not need to do the DSDT stuff which was mostly deleting the OS request from it. I'd like you to test various options of acpi_osi= with a sane initrd (so no applied DSDT patch!) and post the results together with you BIOS version. please append the command in /boot/grub/menu.lst to the line kernel 2.6.22-blabla blalba ... As for me, BIOS v2.40 all of the following ended up with the strange comment in dmesg "ACPI: Please test with "acpi_osi=!Linux" which was exactly what I tried :-S acpi_osi=!Linux "acpi_osi=!Linux" acpi_osi="!Linux" acpi_osi=Linux acpi_osi="Windows 2001" (=XP) acpi_osi="Windows 2006" (=Vista) -- toshiba p100 series dsdt acpi error no sound, works with acpi turned off. https://bugs.launchpad.net/bugs/136469 You received this bug notification because you are a member of Ubuntu Bugs, which is the bug contact for Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
