Anyway.. as I noted above "Presentation mode" is not what Fn+F4 should do.. it is the video switch key which should trigger cycling between output modes (including external output of course). The laptop has a separate presentation mode button. Admittedlty, pressing it doesn't do anything - even in OO.o Impress, although your tests above seem to indicate it is emitting the right keyncode.
I believe Meta+P in Windows $shiney (not sure if it is 7 or Vista) will pop up a manager program to handle the video switch - and presumably HP wanted to get in on that user experience right from the Fn+F4 combo. I couldn't find anything in the DSDT which looked obvious, as I think the alternate keycode based method may be invoked through SMI code. The bios stores the OSI value in an OpRegion presumably used by its SMI code, and also into one used by the Embedded Controller. This BIOS is being too damned clever by half! I couldn't yet manage to nail down how to get the old behaviour back.. I've tried acpi_osi="Windows 2006" from the grub command line - but that didn't work properly. Grub (or something) stripped the quotes, and the kernel set _OSI(Windows) which won't match anything. I believe there have been documented cases of "video things" on some HP laptops behaving differently depending on how the Intel GFX OpRegion is initialised, and the code to do that has changed recently - to avoid some serious issues on another HP laptop. I guess it is (just) possible that could be a trigger. The only other thing I could think was Windows 7. -- Fn+F4 video switch key not working on HP 6730b https://bugs.launchpad.net/bugs/508847 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
