Hello, all. I've just merged vendor power-on button support into mainline. Here is extract from manual: <<EOF Some laptop vendors provide an additional power-on button which boots another OS. GRUB supports such buttons with GRUB_TIMEOUT_BUTTON, GRUB_DEFAULT_BUTTON, GRUB_HIDDEN_TIMEOUT_BUTTON and GRUB_BUTTON_CMOS_ADDRESS variables in default/grub. GRUB_TIMEOUT_BUTTON, GRUB_DEFAULT_BUTTON and GRUB_HIDDEN_TIMEOUT_BUTTON are used instead of corresponding variables without _BUTTON suffix when powered using special button. GRUB_BUTTON_CMOS_ADDRESS is vendor specific and partially model-specific. Values known to GRUB team are:
@table @key @item Dell XPS M1530 85:3 @end table EOF If you have a laptop which has a similar feature could you figure your address and contribute? To discover the address do the following: 1) boot normally 2) sudo modprobe nvram sudo cat /dev/nvram | xxd > normal_button.txt 3) boot using vendor button sudo modprobe nvram sudo cat /dev/nvram | xxd > normal_vendor.txt Then compare these text files and find where a bit was toggled. E.g. in case of Dell XPS it was: byte 0x47: 20 --> 28 It's a bit number 3 as seen from following table: 0: 01 1: 02 2: 04 3: 08 4: 10 5: 20 6: 40 7: 80 0x47 is decimal 71. Linux nvram implementation cuts first 14 bytes of CMOS. So the real byte address in CMOS is 71+4=85 So complete address is 85:3 -- Regards Vladimir 'φ-coder/phcoder' Serbinenko
signature.asc
Description: OpenPGP digital signature
_______________________________________________ Grub-devel mailing list Grub-devel@gnu.org http://lists.gnu.org/mailman/listinfo/grub-devel
