tring to edit brightness

Posted by Martin Mobbs on Ask Ubuntu See other posts from Ask Ubuntu or by Martin Mobbs
Published on 2012-07-01T02:24:54Z Indexed on 2012/07/01 3:23 UTC
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brightness

i'm tring to edit the /sys/class/backlight/max_brightness file to stop ubuntu 12 returning to maximum brightness on each reboot. gedit won't save the file after i have modified it i have used chown to change ownership to me which was successful. I then changed gedits settings so it won't save a backup but it still won't save. It returns with this error,

Could not save the file /sys/class/backlight/acpi_video0/max_brightness. Unexpected error: Error writing to file: Input/output error

is this yet another bug?

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