AAARRRGGGHHH!!! Re: USB CD Burners? - Problem

Brian Chabot brian at datasquire.net
Sun Apr 10 19:03:00 EDT 2005


Ok, so...

I decided to try a non-beta Mandrake install and see if that worked.

Running: MandrakeLinux 10.1 Official

[iarwain at alfred iarwain]$ uname -a
Linux alfred.datasquire.net 2.6.8.1-12mdk #1 Fri Oct 1 12:53:41 CEST
2004 i686 AMD Athlon(tm) XP 2200+ unknown GNU/Linux

BIOS WAS set to PnP OS = NO.  I changed it to YES.  No difference.

I plug in the device:
Apr 10 17:15:38 alfred kernel: usb 4-3: new high speed USB device using
address 4
Apr 10 17:15:38 alfred kernel: Initializing USB Mass Storage driver...
Apr 10 17:15:38 alfred kernel: scsi0 : SCSI emulation for USB Mass
Storage devices
Apr 10 17:15:38 alfred kernel:   Vendor: Memorex   Model: 52MAXX 3252AJ1
   Rev: 4WS2
Apr 10 17:15:38 alfred kernel:   Type:   CD-ROM
    ANSI SCSI revision: 02
Apr 10 17:15:42 alfred kernel: sr0: scsi3-mmc drive: 255x/52x writer
cd/rw xa/form2 cdda tray
Apr 10 17:15:42 alfred kernel: usbcore: registered new driver usb-storage
Apr 10 17:15:42 alfred kernel: USB Mass Storage support registered.
Apr 10 17:15:43 alfred scsi.agent[4911]: cdrom at
/devices/pci0000:00/0000:00:10.3/usb4/4-3/4-3:1.0/host0/0:0:0:0

...When k3b begins its work, the drive seems to be registered as a SCSI
device:

Apr 10 17:16:42 alfred kernel: Attached scsi generic sg0 at scsi0,
channel 0, id 0, lun 0,  type 5


So far, so good.

It starts OK, then a few seconds into the burn, the progress bar stops
moving, but the CD drive is still spinning away.

Writing image: 14%
Overall Progress: 14%
Buffer Status: 98%
Estimated writing speed 4208KB/s (28.05x)

and in /var/log/messages, I get only:
Apr 10 17:17:20 alfred kernel: usb 4-3: USB disconnect, address 4

Now I still can't kill k3b nor the cdrecord processes, even with a
signal 9.  Rebooting or shutting down hangs at killing ALSA because it
can't unload the (disconnected) CD burner's audio device.

Here's what I have tried so far:

1. Toggling the PnP OS setting in the BIOS = No difference.
2. Reload uhci-hcd module (as suggested in a web forum) = Did nothing
but kill off ALL USB ports (including my mouse!)
3. kill automount daemon - No difference.

So I kept looking.... and I *think* I may have found the answer.

In lilo.conf there is a flag for the default kernel that reads:

acpi=ht

I changed this to

acpi=off

...on the advice of one of the postings on some forum (I lost the
location because I rebooted without thinking about where I was looking...)

So I booted with power management off and so far, after about an hour,
it's still connected.

I have NO idea how there is a relation between ACPI and a USB CD burner,
but hey... I'm not complaining.  At least not till I try to do this on a
laptop........

Brian



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