Re: CD Audio - sometimes provided as vfs by the kernel?
On Thu, Mar 02, 2017 at 09:57:23PM +0100, to...@tuxteam.de wrote: > Let us know, I'm curious :-) Me too, this is remarkable. -- Jonathan Dowland Please do not CC me, I am subscribed to the list. signature.asc Description: Digital signature
Re: CD Audio - sometimes provided as vfs by the kernel?
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 On Thu, Mar 02, 2017 at 09:54:10PM +0100, Dominik George wrote: > Hi Tomás, > > > Another possibility (apart from those mentioned in the thread) would > > be that it passes through a different set of udev rules depending on > > the USB port? > > > > You might watch udev doing its thing with udevadm (not much recent > > experience here, sorry). > > ok, I might try that. > > Right now, I suspect something else: The USB drive might have some > processor for that of its own that is only activated on USB 3.0, > probably due to drawing more power, or something. Yeah, that makes some kind of perverse sense too (electronic gadgets are like that). > I will sure find out the real cause ☺. Let us know, I'm curious :-) regards - -- t -BEGIN PGP SIGNATURE- Version: GnuPG v1.4.12 (GNU/Linux) iEYEARECAAYFAli4hzMACgkQBcgs9XrR2kbpMQCfc//0/Q+oWHYA4ILBeHv4JB9/ 3yYAnR/yqgCY4ZBlsCNc2LrjMmXCdttk =vogC -END PGP SIGNATURE-
Re: CD Audio - sometimes provided as vfs by the kernel?
Hi Tomás, > Another possibility (apart from those mentioned in the thread) would > be that it passes through a different set of udev rules depending on > the USB port? > > You might watch udev doing its thing with udevadm (not much recent > experience here, sorry). ok, I might try that. Right now, I suspect something else: The USB drive might have some processor for that of its own that is only activated on USB 3.0, probably due to drawing more power, or something. I will sure find out the real cause ☺. Thanks, Nik -- PGP-Fingerprint: 3C9D 54A4 7575 C026 FB17 FD26 B79A 3C16 A0C4 F296 Dominik George · Hundeshagenstr. 26 · 53225 Bonn Mobile: +49-1520-1981389 · https://www.dominik-george.de/ Teckids e.V. · FrOSCon e.V. Fellowship of the FSFE · Piratenpartei Deutschland Opencaching Deutschland e.V. · Debian Maintainer LPIC-3 Linux Enterprise Professional (Security) signature.asc Description: PGP signature
Re: CD Audio - sometimes provided as vfs by the kernel?
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 On Thu, Mar 02, 2017 at 06:39:13PM +0100, Dominik George wrote: > Hi Ric, > > > You might check your user manual to see if one side is USB 2.0 and the > > other USB 3.0. That might make a difference. Ric > > that's indeed the case. > > Now, why does the USB 2.0 port lead to that WAV file thing, while the > USB 3.0 port does CDDA? Bizarre thing :-) Another possibility (apart from those mentioned in the thread) would be that it passes through a different set of udev rules depending on the USB port? You might watch udev doing its thing with udevadm (not much recent experience here, sorry). Good luck - -- tomás -BEGIN PGP SIGNATURE- Version: GnuPG v1.4.12 (GNU/Linux) iEYEARECAAYFAli4gt4ACgkQBcgs9XrR2kbSbQCZAR9Dh+XWvfYOSz4RXB3kzsb0 WpYAoICPOuFrO8w83ERgYq8JXRcPMzoH =BGmh -END PGP SIGNATURE-
Re: CD Audio - sometimes provided as vfs by the kernel?
Le duodi 12 ventôse, an CCXXV, Dominik George a écrit : > Taking a closer look, I found that the drive was unexpectedly provided > as a USB mass storage device as /dev/sdc, with a partition containing a > FAT filesystem and RIFF audio / WAV files. > > Now, I am using a USB CD-ROM drive, and eventually found out that, usng > the USB port on the *right* hand side of my laptop, I get thie virtual > mass storage device, and using the USB port on the *left* hand side, I > get a /dev/sr0 device I can read CDDA from, as usual. > > I am running Debian sid with kernel 4.9.0-2 on amd64. Seeing what appears in the kernel's output when you plug in each port would probably be interesting. The output of lsusb -v that related to the drive too. > I never saw the Linux kernel do something like this. Does anyone know > since when, and under what circumstances, it does that, how I can > control it, and why it depends on the USB port used? I had heard modules to provide virtual PCM files for audio CDs, but it is usually considered a bad idea, since reading reliably an audio CD requires a lot of care (the "paranoia" in "cdparanoia"). (I am pretty sure we are not related ;-) Regards, -- Nicolas George signature.asc Description: Digital signature
Re: CD Audio - sometimes provided as vfs by the kernel?
Hi Ric, > You might check your user manual to see if one side is USB 2.0 and the > other USB 3.0. That might make a difference. Ric that's indeed the case. Now, why does the USB 2.0 port lead to that WAV file thing, while the USB 3.0 port does CDDA? -nik -- PGP-Fingerprint: 3C9D 54A4 7575 C026 FB17 FD26 B79A 3C16 A0C4 F296 Dominik George · Hundeshagenstr. 26 · 53225 Bonn Mobile: +49-1520-1981389 · https://www.dominik-george.de/ Teckids e.V. · FrOSCon e.V. Fellowship of the FSFE · Piratenpartei Deutschland Opencaching Deutschland e.V. · Debian Maintainer LPIC-3 Linux Enterprise Professional (Security) signature.asc Description: PGP signature
Re: CD Audio - sometimes provided as vfs by the kernel?
On 03/02/2017 11:30 AM, Dominik George wrote: Hi, I just tried to tip an audio CD, like I did hundreds of times before. I tried to run ripit, and it complained that there was no audio CD inserted. Taking a closer look, I found that the drive was unexpectedly provided as a USB mass storage device as /dev/sdc, with a partition containing a FAT filesystem and RIFF audio / WAV files. Now, I am using a USB CD-ROM drive, and eventually found out that, usng the USB port on the *right* hand side of my laptop, I get thie virtual mass storage device, and using the USB port on the *left* hand side, I get a /dev/sr0 device I can read CDDA from, as usual. I am running Debian sid with kernel 4.9.0-2 on amd64. I never saw the Linux kernel do something like this. Does anyone know since when, and under what circumstances, it does that, how I can control it, and why it depends on the USB port used? You might check your user manual to see if one side is USB 2.0 and the other USB 3.0. That might make a difference. Ric -- My father, Victor Moore (Vic) used to say: "There are two Great Sins in the world... ..the Sin of Ignorance, and the Sin of Stupidity. Only the former may be overcome." R.I.P. Dad. http://linuxcounter.net/user/44256.html
CD Audio - sometimes provided as vfs by the kernel?
Hi, I just tried to tip an audio CD, like I did hundreds of times before. I tried to run ripit, and it complained that there was no audio CD inserted. Taking a closer look, I found that the drive was unexpectedly provided as a USB mass storage device as /dev/sdc, with a partition containing a FAT filesystem and RIFF audio / WAV files. Now, I am using a USB CD-ROM drive, and eventually found out that, usng the USB port on the *right* hand side of my laptop, I get thie virtual mass storage device, and using the USB port on the *left* hand side, I get a /dev/sr0 device I can read CDDA from, as usual. I am running Debian sid with kernel 4.9.0-2 on amd64. I never saw the Linux kernel do something like this. Does anyone know since when, and under what circumstances, it does that, how I can control it, and why it depends on the USB port used? Cheers, Nik -- PGP-Fingerprint: 3C9D 54A4 7575 C026 FB17 FD26 B79A 3C16 A0C4 F296 Dominik George · Hundeshagenstr. 26 · 53225 Bonn Mobile: +49-1520-1981389 · https://www.dominik-george.de/ Teckids e.V. · FrOSCon e.V. Fellowship of the FSFE · Piratenpartei Deutschland Opencaching Deutschland e.V. · Debian Maintainer LPIC-3 Linux Enterprise Professional (Security) signature.asc Description: PGP signature
