03-12-2012 03:17 AM
I have a problem with my laptop which is following :
- The cooling system had completely stopped working
- Some hot keys doesn't respond anymore (brightness, sound)
First of all, I was thinking about an OS problem (i'm running debian), so I try Windows & Ubuntu, still the same problem.
Afterwards, I thought about a BIOS problem, so I decide to upgrade this one, by using the BIOS utility whatever boot CD and it solved the problem.
But now one week after I had solved it, the problem is back and because I'm on the last bios firmware I can't upgrade anymore. So I don't know what I can do.
Thanks for you answers.
03-12-2012 02:07 PM
The missing OSD by changing volume and brightness only are the result of a wrong video driver - you should prefer the Lenovo driver.
If other FnFxx - keys also do not work, the powermanagement driver and/or hokey driver are not properly working/installd.
Remove Power Management Driver and install it new after reboot.
Remove Hotkey Driver by its own setup.exe and deinstall the sub-packages from bottom to top one after the other. - Then remove the directory C:\Program Files\Lenovo\HOTKEY ans install the Hotkey Features again.
Do you use a fan control program like PFControl or TPFanControl? - Remove it until the problem is solved.
03-12-2012 03:14 PM
03-13-2012 12:39 PM
If your L412 still is in warranty, do a support call to Lenovo.
03-14-2012 11:40 PM
Hi have you solved your problem yet? I have similar problem with fan stop working and cylinder icon (hard disk thing) stop blinking and the laptop freeze everytime I start up.
However I kinda solve my START UP problem but fan still not working. What I did was following this following TOshiba post http://en.kioskea.net/forum/affich-118428-toshiba-laptop-doesn-t-start-up-black-screen. Laptop is working now (maybe temporary) after I removed entire battery and restart with the AC power only (no battery attached).
I supposed to go to Control Panel> Power Options> Balance> Change advanced setting and customize to minimum processor state from 5% to 100% for each On battery and Plugged in. But I have no idea how to do this step. As I cannot find the Balance tab at all.
04-10-2012 10:50 AM - edited 04-10-2012 10:53 AM
i run debian duplicate the volume/brighness-key bug on a weekly basis. it is (almost) unquestionably a driver problem, which suggests that it will occur with any distrubution that doesn't use proprietary drivers. restarting fixes it, but of course, that is not an acceptable solution, particularly for a linux user.
perhaps lenovo or, more likely, a volunteer will submit a patch one of these days, but the best advice for now is DO NOT BUY A LENOVO L412 IF YOU RUN GNU/LINUX.
07-07-2012 09:30 AM - edited 07-07-2012 09:33 AM
Shutting down and taking out the battery for a few minutes made it for me, maybe lasting a few reboots (I don't know because I just figure it out).