Bug #5341
openBelkin f5u409 usb=>serial dongle periodically stops working
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Description
Sometimes the Belkin dongle gets in a state where all 3 of its LEDs stay off. This corresponds with being unable to run cr1k_d over it. I'm not sure if this is the sole reason for bug#5332, or if that sometimes happens even when the lights are on.
When this state occurs, and you try to use cr1k_d, dmesg starts showing errors like:
usb 1-1: cr1k_d timed out on ep0out len=0/1
usb 1-1: Set MODEM CTRL 0xb failed (error = -110)
usb 1-1: cr1k_d timed out on ep0out len=0/1
usb 1-1: Set LINE CTRL 0x3 failed (error = -110)
usb 1-1: cr1k_d timed out on ep0in len=0/1
usb 1-1: Get MODEM STATus failed (error = -110)
usb 1-1: cr1k_d timed out on ep0out len=0/1
I've tried this procedure to see if I could get the dongle working again, but it didn't work:
lsmod | grep -i usb
sudo rmmod mct_u232;
lsmod | grep -i usb;
sudo modprobe mct_u232
Rebooting consistently makes it work again.
Nick recommends trying a Keyspan dongle, and updating from ubuntu 9.04 to 10.04 (new kernel, possible hardware fixes).
I'll try the dongle he recommends when I get a chance.
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