https://bugzilla.novell.com/show_bug.cgi?id=578578
https://bugzilla.novell.com/show_bug.cgi?id=578578#c8
--- Comment #8 from Michael Chang 2011-08-25 03:12:23 UTC ---
Thanks. To me that nothing printed is reasonable as this implies that drm
driver didn't perform any real brightness setting in respond of attempting to
set it. This is weird but possible, there's breakage of something in the middle
of the process in prior of driver was asked to set a value. :)
I think we can rule out combination mode as it didn't take place and focus on
the ACPI issue. From your log that's Intel opRegion bios relies on in order to
communicate with vga driver (a memory region when you write some value, an
interrupt is trigger automatically to notice vga driver to fetch the value and
do something (like change brightness) accordingly).
Would you please help to dump the ACPI for debugging?
$ acpidump > acpidump.hex
And attach the acpidump.hex ..
Thanks a lot. :)
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