linux-kernel - Re: 2.6.21-rc2 radeon backlight

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Fri, 02 Mar 2007 13:40:05 -0800 (PST)
From:	David Miller <davem@...emloft.net>
To:	romosan@...orax.lbl.gov
Cc:	hmh@....eng.br, akpm@...ux-foundation.org,
	linux-kernel@...r.kernel.org,
	linux-fbdev-devel@...ts.sourceforge.net, rpurdie@...ys.net
Subject: Re: 2.6.21-rc2 radeon backlight

From: Alex Romosan <romosan@...orax.lbl.gov>
Date: Fri, 02 Mar 2007 13:22:27 -0800

> if i don't enable the radeon backlight support the backlight works and
> i can turn it on and off using radeontool. if i enable the radeon
> backlight support the screen stays dark (although i can log on my
> laptop remotely). if i try to use radeontool to turn the backlight on
> nothing happens. so, at least on the thinkpad, the radeon backlight
> support disables some other kind of backlight support that works
> otherwise.

Right, that's the crux of the problem.

The Radeon backlight support conflicts somehow with the
way the ACPI code programs the same hardware, and until
we figure out exactly what's going on, this is a regression.
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/