Re: brightness_mode report on a ThinkPad R50e

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On Sat, 14 Nov 2009, Ferenc Wagner wrote:
> thinkpad_acpi: ThinkPad BIOS 1WET90WW (2.10 ), EC 1VHT28WW-1.04
> thinkpad_acpi: IBM ThinkPad R50e, model 1834S5G

...

> Actually, this is the only mode that does NOT work; both 1 and 3 work
> instead.  Hope it's useful.

Yes, it is.  Can you give me the output of lspci for your ThinkPad, please?

Also, while we're at it, I'd appreciate if you could send me by private
email the full output of acpidump, and the output of dmidecode (please mask
out any serial numbers and UUIDs).

> I've got two -- probably not particularly useful -- notes as well:
> 
> 1. The thinkpad_acpi module has lots of parameters, but no
>    /sys/modules/thinkpad_acpi/parameters directory.  Even if no
>    parameters are changeable in runtime, this is unusual.

On 2.6.31, that directory is not present.  Probably the kernel notices it
has nothing to display in there and doesn't create it.

If you feel it would be useful to have the read-only parameters displayed
there, I can update the module to have them show up.

Note that the parameters that issue commands wouldn't be added, just the
normal ones.

> 2. While removing and reloading the module trying the different modes, I
>    managed to reach the state that the /proc/acpi/ibm directory is
>    created, but left empty by the module.  I'm unable to reproduce it
>    now, but it wasn't the first time, I also got here a couple of months
>    ago playing with the module.  Then I postponed sending in this report
>    for this reason: I hate such things. :)  Maybe my PWD was
>    /proc/acpi/ibm when I (tried to) remove the module, maybe not...

Well, that would be a bug somewhere else in the kernel, I think, unless I am
missing declaring an owner somewhere.  I will look into it.

-- 
  "One disk to rule them all, One disk to find them. One disk to bring
  them all and in the darkness grind them. In the Land of Redmond
  where the shadows lie." -- The Silicon Valley Tarot
  Henrique Holschuh

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