On Sat, Sep 26, 2009 at 04:44:41PM -0300, Henrique de Moraes Holschuh wrote:
> On Sat, 26 Sep 2009, Paride Legovini wrote:
> > As the subject says, when I resume the system after suspending it the
> > brightness level is reset to the lowest level. The system is a thinkpad
> > X60s with a 2.6.31(.1) vanilla kernel. IIRC, this did not happen with
> > the 2.6.30 kernels.
>
> Please load the thinkpad-acpi driver with the debug=0xffff paramenter, do a
> suspend-resume cycle, and send me the resulting kernel logs.
>
> Please also check the contents of /sys/class/backlight/thinkpad_screen/*
> before and after the resume.
Before I do anything here I want to understand if this problem is really
related to the thinkpad-acpi module or is a generic acpi issue (again!).
I set THINKPAD_ACPI_VIDEO=n, following this option's help suggestion
("If you can use X.org's RandR ... don't think twice: do it and say N").
Thus (?) I don't have /sys/class/backlight/thinkpad_screen/, but I do
have /sys/devices/virtual/backlight/acpi_video0 and I can control the
brightness level from there. So, is this control related to
thinkpad-acpi at all?
Until 2.6.30 kernels (included) the brightness level was retained after
the resume.
> Just to be sure, the X60s uses an Intel GPU, correct?
Yes: Intel Corporation Mobile 945GM/GMS, 943/940GML, and I'm using KMS.
Let me know.
Paride
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