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Diffstat (limited to 'info/adjbacklight.texinfo')
| -rw-r--r-- | info/adjbacklight.texinfo | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/info/adjbacklight.texinfo b/info/adjbacklight.texinfo index 000a742..fb5e16b 100644 --- a/info/adjbacklight.texinfo +++ b/info/adjbacklight.texinfo @@ -86,6 +86,16 @@ at least that. If you want higher precision, it is simple to modify the source code. Just run @code{sed -i s/200/400/g src/adjbacklight.c}, if you want 0.25 % precision. +@cindex root +@cindex video +@cindex permissions +To use @command{adjbacklight} you must either be root or be a member of the +group `video'. The `video' membership requirement is artificial so you can rip +that out from the code if you prefer, but the effective user must be `root' +(EUID = 0) otherwise you will not have permission to use files in +@file{/sys/class/backlight} unless you make your initialisation +system give you access. + @node Invoking |