[Pkg-libburnia-devel] Bug#789260: libburn4: Incompatibility with Plextor PX-608CU burner
undelborg at gmail.com
Mon Jun 22 17:57:15 UTC 2015
I'll get the info ASAP.
In the meantime, I have found some interesting discussion about UAS bugs in
And another one in kernel 3.17:
An here comes the output from my kern.log:
Jun 22 15:12:02 D-NESTERKIN kernel: [ 1.377470] usb 3-2: new high-speed
USB device number 2 using xhci_hcd
Jun 22 15:12:02 D-NESTERKIN kernel: [ 1.508224] usb 3-2: New USB device
found, idVendor=093b, idProduct=0023
Jun 22 15:12:02 D-NESTERKIN kernel: [ 1.508230] usb 3-2: New USB device
strings: Mfr=85, Product=57, SerialNumber=44
Jun 22 15:12:02 D-NESTERKIN kernel: [ 1.508233] usb 3-2: Product:
PLEXTOR USB Storage Adapter
Jun 22 15:12:02 D-NESTERKIN kernel: [ 1.508235] usb 3-2: Manufacturer:
Jun 22 15:12:02 D-NESTERKIN kernel: [ 1.508238] usb 3-2: SerialNumber:
Jun 22 15:12:02 D-NESTERKIN kernel: [ 1.510924] usb-storage 3-2:1.0: USB
Mass Storage device detected
Jun 22 15:12:02 D-NESTERKIN kernel: [ 1.511118] scsi6 : usb-storage
Jun 22 15:12:02 D-NESTERKIN kernel: [ 1.511270] usbcore: registered new
interface driver usb-storage
Looks somewhat similar for me.
2015-06-22 20:37 GMT+03:00 Thomas Schmitt <scdbackup at gmx.net>:
> > I suppose it would be also helpful to compare not only kernel versions,
> > also libs versions involved.
> Kernel modules for USB, (S)ATA, SCSI, maybe.
> Userland libraries should hardly be involved, unless they
> impose workload on USB.
> Last time i tried to understand SG_IO, i ended up at
> the entrance of the i/o elevator. Dunno where the request
> leaves that thing and hits the hardware controller driver.
> At some point of my current endeavor i will have to find
> out why the new kernel shows such a miserable performance
> with two concurrent DVD burns. I already read rumors that
> it performs SG_IO synchronously in a single queue for all
> devices. But i had thought that 2 times 4x DVD speed would
> be no problem for a contemporary system.
> My olde 2.6 on weaker hardware did it without problems.
> Have a nice day :)
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