This is weird. I have a dual boot with Windows XP. I have not booted Win XP for
almost one month. Today I used it, just to check compatibility between an Open
Office file and MS Word. Power off, reboot to Ubuntu: the screen is bright
since the beginning of the boot process (Asus splash, grub, Ubuntu splash,
etc.). Shutdown and boot again: everything is still bright. I activate a
virtual console and go back to gnome: bright screen. MPlayer: bright. This is
very hard to understand. ("Yes! Bill Gates made the miracle!!!" -- gosh: could
not be worse than that.) A new test: I run acpi_listen before loading mplayer
and _no acpi codes_ are being sent any more when I run mplayer (when the screen
went dim, acpi codes were sent every time mplayer started).
Windows has certainly not fixed a bug in the Linux kernel. If running mplayer
resulted in some weird acpi codes being sent, and (2) these codes are not sent
any more, and (3) the kernel is the same, the only thing I can think of is that
some kind of bios flag has been switched on or off by WinXP. Some idiosyncratic
feature of my laptop that is probably hidden to the Linux developers and
probably open to Microsoft.
The conclusion I am inclined to draw is that it is high time for the Linux
community to find effective ways for pressing on the manufacturers. Something
like boycotting especially hostile manufacturers or explicitly and strongly
recommending manufacturers that produce Linux drivers and Linux friendly
machines.
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LCD Brightness on Laptop Always Set Very Low at Boot
https://bugs.launchpad.net/bugs/12637
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