DVD Drive can read CDs but no DVDs

Question

I'm having a weird issue here. The DVD-Drive is recognized and regular CDs are readable, but DVDs (talking about the regular burned one, not movies) aren't.

sudo lshw -C disk outputs (except for the hd):

  *-cdrom
       description: DVD-RAM writer
       product: DVD-RAM UJ890AS
       vendor: MATSHITA
       physical id: 0.0.0
       bus info: scsi@1:0.0.0
       logical name: /dev/cdrom
       logical name: /dev/cdrw
       logical name: /dev/dvd
       logical name: /dev/dvdrw
       logical name: /dev/sr0
       version: 1.00
       capabilities: removable audio cd-r cd-rw dvd dvd-r dvd-ram
       configuration: ansiversion=5 status=ready
     *-medium
          physical id: 0
          logical name: /dev/cdrom

I did some checks but that device seems to be perfectly supported by the system. No external drivers needed. Some posts suggested editing fstab but the drive is found and regular CDs work. (In fstab are only the hdd and its swap partition registered). libdvdread4 is installed too.