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OS: Ubuntu 11.10 Kernel: Laptop: sony vaio vpc-z21x9r

The problem: I can't change level of screen backlight; also can't enable wi-fi. While using 3.0 kernel everything is ok, but the laptop discharges too quickly.

Results for lspci

02:00.0 Network controller: Intel Corporation Centrino Wireless-N + WiMAX 6150 (rev 5f)
VGA compatible controller: Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller (rev 09)

there is no wlan0 in ifconfig -a too. I've fount that kernel should already have drivers for this graphics controller, but when i load up in restore mode, it writes "fall" while trying to load up some video drivers.

To change the level of backlight i've alrady tried:

xbacklight -set XX


smartdimmer -s XX

and got this

init_ nvclock() failed!

also sudo setpci -s 00:02.0 F4.B=XX with no results. As for wi-fi, i've found driver but i don't understand how to install it. Here it is How can I fix these problems? Thank you for your help and time!

Also tried to fix problems with backlight writing GRUB_CMDLINE_LINUX_DEFAULT="quiet splash nomodeset acpi_backlight=vendor

Still no results. Is there any sense in recompiling kernel, I mean Can it make any improvements in the situation?

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closed as too localized by Luis Alvarado Mar 14 '13 at 16:17

This question is unlikely to help any future visitors; it is only relevant to a small geographic area, a specific moment in time, or an extraordinarily narrow situation that is not generally applicable to the worldwide audience of the internet. For help making this question more broadly applicable, visit the help center. If this question can be reworded to fit the rules in the help center, please edit the question.

This question appears to be abandoned and unanswered, could you perhaps add more detail to your question? If this question no longer applies then you can either delete it or answer it yourself if you've solved the problem. Thanks! –  coversnail Apr 11 '12 at 8:45