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SubjectRe: CDROM (VCD) and 2.3.15-17pre1
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On Sun, Sep 05 1999, German Jose Gomez Garcia wrote:
> Hello,
> Since 2.3.15 (the first 2.3.6+ kernel I was able to boot) the CDROM
> driver is giving very strange problems, it seems that trying to open a
> Audio CDROM will fail, and mtv (an mpeg player) is unable to play VCD
> cds. Some programs like cdtool will fail also.
> Does this mean that there have been uncompatible changes to the
> CDROM driver? If that is true lot of non-free applications will be
> broken, and I think that this is not the correct way to do things, I
> really prefer free software, but not everything may be free. Just hope the
> problems with CDROM driver will get fixed before 2.4 (and also hope devfs
> gets finally into the kernel before 2.4).

The CD-ROM problem is not as big as it sounds and is easily fixable
(either the kernel or the programs). The problems you are seeing
are caused by Uniform CD-ROM interface completely failing blocking
opens on non-data CD's. Either patch the application to open
the device O_NONBLOCK or load cdrom.o with check_media_type=0.
I think I'll let it default to 0 again (which it did prior to
2.3.15).

--
* Jens Axboe <axboe@image.dk>
* Linux CD-ROM Maintainer
* http://www.kernel.dk

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