On Fri, 29 Oct 2004, Dieter Weber wrote:
> Hi!
> I am experiencing failures (see kern.log) when writing to the 05e3:0702 rev.
> 0.02 Genesys Logic IDE to USB 2.0 bridge with USB 2.0 speed with linux kernel
> 2.6.9. The drive has to be reset by unplugging power. Again plugging in the
> device causes the error messges appended as kern_replug.log. I need to reboot
> to get USB working again. My board is based on Intel ICH4/ICH4-L (P4 2GHz).
> Device descriptors are appended, too.
> I thought those problems have been resolved with 2.6.9, according to the
> changelog...
>
> kern.log the device just failed to operate
> kern_replug.log device reset by unplugging power
> and plugged in again
> dmesg.out Output of dmesg after booting again.
> lspci.out # lspci -vv
> usb_devices # cat /proc/bus/usb/devices
> kern_again.log plugging in and unplugging the device without writing to it
>
> Thank you for tolerating the excessive attachements... ;)
>
> (hoping for help)
> Dieter Weber
This certainly does look like the classic Genesys Logic usb-storage
problem. The workaround that was added to 2.6.9 has helped many people,
but apparently it's not adequate for your drive.
You could try increasing the internal time delay. If you edit the
drivers/usb/storage/transport.c file in the kernel source and search for
GENESYS, on the next line you'll see
udelay(100);
You could change the 100 to 200; maybe it will help.
The other problems in your logs are errors in the SCSI layer. People have
been working on fixing them recently, but I don't know if the fixes are
available yet. Perhaps if you try the most recent -mm kernel...
Alan Stern
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