Le 21/03/2016 22:47, Ed Greshko a écrit :
On 03/22/16 05:40, François Patte wrote:
> Le 21/03/2016 15:11, Tim a écrit :
>> Allegedly, on or about 18 March 2016, François Patte sent:
>>> I am facing a strange problem with xfce configuration: when I put a
>>> commercial video dvd in the drive: no icon appears on the desktop. and
>>> there are error messages in /var/log/messages, like:
>>>
>>> blk_update_request: I/O error, dev, sr0 sector 9137664
>>>
>>> buffer I/O error on dev sr0, logical block 1142208 async page read
>>>
>>> But, I can play the video with vlc without any problem....
>>>
>>> If I mount this dvd (say: mount /dev/sr0 /media), no problem, no error
>>> reported....
>>>
>>> When I umount the dvd (umount /media), an icon appears on the desktop
>>> and immediately disappears.....
>>>
>>> This problem does not occur with dvd I recorded myself, nor with any
>>> other removable media (usb sticks or drives).
>> An educated guess: This would be an encrypted, deliberately-faulted
>> (some discs have deliberate errors that confuse the hell out of
>> computers, but standalone DVD players will simply bypass), or some other
>> kind of copyguarded DVD, some of which are a major pain to do anything
>> with on a Windows OS PC. Even my old dreaded Windows installation would
>> refuse to even load some DVDs to look at the files in the file browser,
>> never mind trying to play them. Your VLC installation *may* have
>> support for handling such DVDs in a different manner.
>>
>> Of course, it could just be a bad disc (you don't mention whether it's
>> just one problem disc), or it may need cleaning, or your drive may need
>> cleaning.
> This problem occurs with 2 machines (laptop) on which I installed fedora
> 23. Problem does not occur on a third computer running fedora 21. On one
> of the laptops where previously installed a debian, and no problem occured.
>
> It is not a vlc problem; vlc mounts and reads these dvd without any
> problem, I think that it is an xfce problem, but on my fedora 21 I have
> the same version of xfce as on laptops with fedora 23.
Is libdvdcss (not a fedora package) installed on your working systems?
Of course! If not vlc does not read dvd. But, is libdvdcss is reponsible
for the display of dvd icons? I am wondering if there is not a bug
there: I took libdvdcss from remi repo (livna was out of order at that
time).
--
François Patte
UFR de mathématiques et informatique
Laboratoire CNRS MAP5, UMR 8145
Université Paris Descartes
45, rue des Saints Pères
F-75270 Paris Cedex 06
Tél. +33 (0)1 8394 5849
http://www.math-info.univ-paris5.fr/~patte