On Thu, 12 Aug 2004, Juergen Leising wrote:
> Hello,
>
> my USB subsystem also seems to loose its connection to a HP
> LaserJet 1010 printer from time to time without any
> visible reason.
>
> The only way to regain control over that printer is reloading
> usb-uhci.o:
>
> modprobe -r usb-uhci
> modprobe usb-uhci
>
> This failure happens quite often, however, I can NOT reproduce
> the problem.
>
> I have been trying several kernels from 2.4.20 up to 2.4.26 now
> without any difference. I have always used CONFIG_USB_DEBUG=y
> and in drivers/usb/printer.c #define DEBUG.
>
> Using uhci.o instead of usb-uhci.o does NOT work for me as uhci.o
> produces kernel oopses.
>
> Compiling usb-uhci statically does NOT help either, instead it
> forces me to reboot the computer, as there is no module any more
> to be reloaded.
>
> Power cycling of the printer does NOT help in this respect
> (switching off is a workaround for other problems, but not for
> this one).
>
> After the usb subsystem has disconnected, the driver processes
> can not be killed any more ("D"-flag with the ps command).
> Cups, lpr and foomatic-rip do not report anything in this
> situation. The only process that leaves some messages in the
> syslog right after the disconnect is ptal-mlcd (= part of hpoj,
> i. e. a go-between between the device and the
> renderers/spoolers):
> A second usb device btw, a creative web cam, does NOT get
> affected by that problem, i. e. it keeps being accessible.
>
> Does anyone know what to do?
Try using Linux 2.6 and see what happens.
Alan Stern
-------------------------------------------------------
SF.Net email is sponsored by Shop4tech.com-Lowest price on Blank Media
100pk Sonic DVD-R 4x for only $29 -100pk Sonic DVD+R for only $33
Save 50% off Retail on Ink & Toner - Free Shipping and Free Gift.
http://www.shop4tech.com/z/Inkjet_Cartridges/9_108_r285
_______________________________________________
[EMAIL PROTECTED]
To unsubscribe, use the last form field at:
https://lists.sourceforge.net/lists/listinfo/linux-usb-devel
