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-   -   Fan speed freezes, and hotkeys stop working. Laptop LenovoThinkpad L512 (2597AB2) (http://www.linux-archive.org/debian-user/706351-fan-speed-freezes-hotkeys-stop-working-laptop-lenovothinkpad-l512-2597ab2.html)

evol 09-22-2012 12:42 PM

Fan speed freezes, and hotkeys stop working. Laptop LenovoThinkpad L512 (2597AB2)
 
think I understand what you're saying, but let me ask this question.
Do you mean that all only the specific keys and key combinations you
listed stop working. The rest of the keyboard and the mouse still work?



And are you saying that the system can not be forced down by holding the
power button down?


but everything else works.


Are you able to turn off power management? What happens when you do that?


did not understand that off?


I'll make a suggestion. If you can manage it, you should try booting the
computer with a live CD of a distro like Ubuntu to see if you see the
same problems. If not, then at least you probably don't have a hardware
problem. In that case, then this might be some kind of driver or
configuration problem.


install ubuntu 10.11 (another wasn't)
everything works perfectly.
all keys work perfectly and don't vanish.
cooling behaves perfectly.

this subject I and one more person raised here https://bugzilla.kernel.org/show_bug.cgi?id=27792



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Worrier Poet 09-22-2012 02:16 PM

Fan speed freezes, and hotkeys stop working. Laptop LenovoThinkpad L512 (2597AB2)
 
On 09/22/2012 08:42 AM, evol wrote:
>> think I understand what you're saying, but let me ask this question.
>> Do you mean that all only the specific keys and key combinations you
>> listed stop working. The rest of the keyboard and the mouse still work?
>
>> And are you saying that the system can not be forced down by holding the
>> power button down?
>
> but everything else works.
>
>> Are you able to turn off power management? What happens when you do that?
>
> did not understand that off?
>
>> I'll make a suggestion. If you can manage it, you should try booting the
>> computer with a live CD of a distro like Ubuntu to see if you see the
>> same problems. If not, then at least you probably don't have a hardware
>> problem. In that case, then this might be some kind of driver or
>> configuration problem.
>
> install ubuntu 10.11 (another wasn't)
> everything works perfectly.
> all keys work perfectly and don't vanish.
> cooling behaves perfectly.
>
> this subject I and one more person raised here
> https://bugzilla.kernel.org/show_bug.cgi?id=27792
>
>

Hi, evol!

There's no need to send mail directly to me. Folks just generally reply
directly to the list (in this case debian-user@lists.debian.org).

I had given up on hearing back from you and deleted the thread from my
local cache. So all I have of the thread -- unless I go look up a digest
somewhere -- is this message from you.

So it sounds as though Debian doesn't work with this system and Ubuntu
(at least one version) does work. My first thought in that case is that
this must be a firmware issue. Canonical imbues Ubuntu with lots of not
free firmware and software that is deliberately left missing in Debian.

I suppose you could fix Debian so that it works for you by finding out
what hardware isn't being supported properly by firmware / drivers and
getting said firmware / drivers from the contrib or non-free repositories.

You're going to need hardware gurus (or at least people smarter on the
subject than me) to help you. I understand the process of finding the
unsupported hardware in general, but don't have practical experience.
The reason for that is that I always do the research to make sure that
the hardware I buy is supported by Debian's main repository. I totally
avoid proprietary and other non-free firmware and drivers these days. (I
used to go bonkers every time a system update made all the non-free
stuff go wacky.)

I do think it's interesting that a Lenovo Thinkpad would have this
problem. My experience with Thinkpads (I have a T520i) and Debian has
been really good with all free software.


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