Non ho installato nella cartella root (almeno credo), se faccio whereis mplayer mi esce cosė:

mplayer: /usr/local/bin/mplayer /usr/local/etc/mplayer /usr/local/lib/mplayer

negli errori c'č root perchč ho avviato il programma come utente root, ma anche come utente normale mi escono gli stessi errori, ma indicando, al posto di root, l'utente selezionato:

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Reading config file /usr/local/etc/mplayer/mplayer.conf: No such file or directo
ry
Reading config file /home/christian/.mplayer/config
Reading /home/christian/.mplayer/codecs.conf: can't open '/home/christian/.mplay er/codecs.conf': No such file or directory
Reading /usr/local/etc/mplayer/codecs.conf: can't open '/usr/local/etc/mplayer/c odecs.conf': No such file or directory
Using built-in default codecs.conf
font: can't open file: /home/christian/.mplayer/font/font.desc
font: can't open file: /usr/local/share/mplayer/font/font.desc
Linux RTC init error in ioctl (rtc_irqp_set 1024): Permission denied
Try adding "echo 1024 > /proc/sys/dev/rtc/max-user-freq" to your system startup scripts.
Using usleep() timing
Can't open input config file /home/christian/.mplayer/input.conf: No such file o r directory
Can't open input config file /usr/local/etc/mplayer/input.conf: No such file or directory
Falling back on default (hardcoded) input config
............

cos'ho fatto di sbagliato? sembra quasi che non trovi nessun codec...

Un'altra cosa: adesso come lo disinstallo? :master: (come avrai capito non sono particolarmente esperto)