From Bugzilla Helper: User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.7.5) Gecko/20041111 Firefox/1.0 Description of problem: I've found some bug reports about oopses when plugging in USB storage device, but this problem seems to be different. Kernel recognizes the drive, it does not crash, but it doesn't operate properly. I have Sony DRU-710A DVD burner (external USB). When I plug it, kernel recognizes it as high-speed USB devices. However, I am not able to use the device. Soon after plugging it, kernel starts to complain about the device, tries to reset it, and than goes in circles simply filling the logs whenever I attempt to use device. If I attempt to use dd to extract CD or DVD image, more errors are logged (Buffer I/O error on device sr0). What is strange (as you'll see from the log files), device is not detected exactly the same every time. Sometimes it is detected as 48x/48x CD burner, sometimes as 40x/40x CD burner, and I even got it detected as 125x/48x (?!) CD burner once. Every time, the device is detected as CD burner, not as DVD burner (I'm not sure if kernel makes any difference between the two). I'll include relevant portion of /var/log/message and output of lspci -v as attachments. $ cat /proc/scsi/scsi Attached devices: Host: scsi2 Channel: 00 Id: 00 Lun: 00 Vendor: SONY Model: DVD RW DRU-710A Rev: BY01 Type: CD-ROM ANSI SCSI revision: 02 $ cat /proc/scsi/usb-storage/2 Host scsi2: usb-storage Vendor: Unknown Product: Unknown Serial Number: None Protocol: Transparent SCSI Transport: Bulk Quirks: Version-Release number of selected component (if applicable): kernel-2.6.10-1.741_FC3 How reproducible: Always Steps to Reproduce: 1. Attach Sony DRU-710A external USB device Additional info:
Created attachment 110162 [details] errors from /var/log/message
Created attachment 110163 [details] output of lspci -v
BTW, if this is related to the same problem (kernel oops when USB device is attached), let me know and I'll resubmit these as comments to that bug report.
Created attachment 110164 [details] errors from /var/log/message The previous log file was missing kernel messages as the device was plugged in. This log is more complete.
I've installed (couple of days ago) a fresh installation of FC3 onto different motherboard (Intel D865PERL). With this motherboard everything seemed to more or less with stock FC3 kernel (kernel-2.6.9-1.667), as long as DVD was plugged in before machine was booted. I was getting some strange oops messages if I unplugged/plugged it while kernel was up and running. After upgrading to latest kernel (kernel-2.6.10-1.741_FC3), I lost links in /dev directory, and entry for this device in /etc/fstab. Upgrading udev doesn't seem to have changed anything. However, I was able to access device using /dev/scd0 (for reading and writing to it). Writing to it using cdrecord wasn't very successfull (more details added to bug #136665).
Seems to be working with current kernels.