From: "Pali Rohár" <pali.rohar@gmail.com>
To: linux-acpi@vger.kernel.org
Subject: Brightness on HP EliteBook 8460p
Date: Fri, 15 Jul 2011 14:15:45 +0200 [thread overview]
Message-ID: <3123346.jTQFjj4kVk@pali-elitebook> (raw)
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Hello,
on my HP EliteBook 8460p is not possible to set display brightness when ACPI
is enabled in kernel. Entries in sysfs is properly created without errors. But
when I try write any value to /sys/class/backlight/acpi_video0/brightness
nothing happened (and no error is in dmesg). When I press Fn key for chaining
display brightness kernel send correct key event (tested with xev) but nothing
happened too.
When I disabled ACPI (acpi=off in kernel command line) all Fn keys are broken
and not working (no events in xev). But brightness keys working (I think on HW
level, because xev does not see it) - increase and decrease display
brightness.
So what can I do with my notebook? I think that there is error/bug in BIOS or
ACPI because with disabled ACPI brightness working. But with disabled ACPI is
notebook unuseable (no battery info, no Fn keys, no WIFI rfkill, ...). Can
somebody help me with this problem?
--
Pali Rohár
pali.rohar@gmail.com
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next reply other threads:[~2011-07-15 12:15 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-07-15 12:15 Pali Rohár [this message]
[not found] ` <CAGB3EUSiZ+DqTwVQ4CMhT=LNAAWhj-VriiArmoibm0t+x5jLXw@mail.gmail.com>
2011-12-09 14:49 ` Fwd: Brightness on HP EliteBook 8460p joeyli
[not found] ` <3404497.1txogKB5v8@pali-elitebook>
2011-12-18 10:59 ` Pali Rohár
2011-12-18 15:47 ` joeyli
2011-12-20 8:13 ` joeyli
2011-12-20 13:20 ` Pali Rohár
2011-12-21 2:16 ` joeyli
2011-12-21 4:05 ` joeyli
[not found] ` <9136713.SR1vWBOW6T@pali-elitebook>
2012-01-17 18:10 ` Pali Rohár
2012-01-20 3:12 ` joeyli
2012-01-20 3:28 ` joeyli
[not found] ` <2085914.rvJjIXUC3h@pali>
2012-02-03 15:24 ` Pali Rohár
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