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List: ibm-acpi-devel
Subject: Re: [ibm-acpi-devel] 2.6.31-rc2: thinkpad boots with backlight low
From: Tobias Diedrich <ranma () tdiedrich ! de>
Date: 2009-07-16 6:16:42
Message-ID: 20090716061642.GB13056 () yamamaya ! is-a-geek ! org
[Download RAW message or body]
Henrique de Moraes Holschuh wrote:
> And that will, of course, cause the driver to set the brightness in NVRAM to
> zero (but it *should* do so for shutdown as well, not just machine-restart.
> You may have uncovered two bugs, not just one), which will be honoured by
> the BIOS on the next reboot/power up.
I does set it to zero (or whatever was last written to the sysfs or
/proc/acpi/ibm file) on shutdown and reboot, so no bug there.
> > I assume that the autodetection finds the HBRV acpi function and
> > selects the former, resulting in a not working backlight control.
>
> Yes.
>
> Please send me by private mail the output of acpidump and dmidecode (so that
> I will have them both in the same place). I will blacklist your thinkpad to
> force TPACPI_BRGHT_MODE_UCMS_STEP.
Done.
--
Tobias PGP: http://9ac7e0bc.uguu.de
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