Messages in this thread | | | From | Michael Frank <> | Subject | Re: [linux-usb-devel] 2.6.0-test4 - PL2303 OOPS - see also 2.4.22: OOPS on disconnect PL2303 adapter | Date | Wed, 3 Sep 2003 06:13:19 +0800 |
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On Wednesday 03 September 2003 00:43, Greg KH wrote: > On Tue, Sep 02, 2003 at 01:39:08AM +0800, Michael Frank wrote: > > PL2303 is used to connect the serial console on a classic serial port > > of a test machine. HW nandshaking is used > > The test machine reboots once a minute and dumps lots of messages > > > > Frequently: > > - driver hangs > > - userspace (cu) can't be stopped > > - pl2303 and/or usbserial can't be unloaded > > - USB interrupts stop > > - problems result in requiring a reboot. > > Hm, it looks like you physically removed the device, is that correct? > Or were you just unloading the pl2303 and other USB drivers and then > reloading them? > > What exactly were you doing in this log? > > Oh, and can you send a copy of /proc/bus/usb/devices with your pl2303 > device plugged in? >
Whenever it stops working I follow this sequence, which you can match to the logs.
1) Exit cu by ~. - if this does not work try \r~. - if this does not work Send SIGHUP, (which so far always worked)
2) Start cu again - if it prints leftover characters exit cu again by ~. and continue from step 2)
3) If it still not works and hangs again - for a few tries unplug PL2303, wait a second replug and goto step 2)
4) If it still does not work - Remove PL2303, unload and reload usb (all) and plug PL2303 again - If module unloading fails, or interrupts died (no response to plugging) > reboot
Regards Michael
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