On Fri, 2014-08-29 at 09:45 -0700, Len Ovens wrote: > On Fri, 29 Aug 2014, dale wrote: > > > This has caused various headaches I have kind learned to live with. Main > > one being relating to screen brightness. If I set a low default screen > > brightness in Windows then it seems to change the range of brightness > > Linux can display. This was even more noticable when running LiveUSB > > distros! I actually couldn't get the screen bright enough to see what I > > was doing without setting the level within Windows bright again! > > Is there a setting in regular bios for screen brightness? EFI my leave > some variables around that the OS can continue to manipulat after boot... > wonderful :P > No and I've looked again and again thinking it must be settable elsewhere if it can be set from the Lenovo software/Windows and affect all booted OSes. > > Then I read (or skimmed) this yesterday and feel even more confused. > > https://wiki.archlinux.org/index.php/UEFI > > I see what you mean, every time I thought I was getting somewhere, I got > sent to yet another page. The most I got out of it was that EFI is intel's > answer to grub but with more control of the firware settings at the same > time. The old bios included calls to access some of the HW, but no one > used them as they were not muti-task/user friendly. It appears EFI does > the same thing and windows uses it and Linux does not know how to access > at least part of it. (or windows sets up its own calls within it) > > > > But I am starting to think I should try enabling it with a Linux > > install. Especially as I plan to completely banish Windows from the > > computer now... But I thought I would ask what more experienced Linux > > users have to say about UEFI mode vs BIOS/Legacy mode. > > You will get some I don't doubt... it may be hard to tell the truth from > FUD ;) EFI and Linux are still relatively new (3.10ish) and complaints > found in one kernel version may no longer be true. > > -- > Len Ovens > www.ovenwerks.net > I guess it must tie into ACPI somehow. Or would that be a silly assumption? I believe ACPI controls hardware functions, including screen brightness and fan controllers, while the system is running. Or am I confused? I know on the rare occasions I've had a crash there have been lots of ACPI Unknown (or similar) messages in my log! Did mean to look into it further at some point... _______________________________________________ Linux-audio-user mailing list Linux-audio-user@xxxxxxxxxxxxxxxxxxxx http://lists.linuxaudio.org/listinfo/linux-audio-user
