I also asked some people complaining about problems with the PSC 1210 on the HPOJ list to unload the scanner.o module, but I did not get answers telling that this solved the problem. I found the scanner.o bug by these bug reports for Mandrake Linux:
https://qa.mandrakesoft.com/show_bug.cgi?id=5740 https://qa.mandrakesoft.com/show_bug.cgi?id=5641
In Mandrake 9.2 the scanner.o module is appropriately fixed.
Till
David Paschal wrote:
Hi, Henning. I recently discovered that the Linux kernel USB scanner driver (in 2.4.22 and 2.6.0-test at least) binds to a few HP multi-function peripherals:
{ USB_DEVICE(0x03f0, 0x1411) }, /* PSC 750 */ { USB_DEVICE(0x03f0, 0x2f11) }, /* PSC 1210 */
This serves no useful purpose for the PSC 750, which only has a printer- class interface, and it actually causes problems on the PSC 1210, because it binds to the vendor-specific interfaces on that model and prevents the user-mode HP OfficeJet Linux driver (http://hpoj.sf.net) from accessing them (via libusb). As a result, I had to include a workaround in the hpoj code, where it checks for this condition in /proc/bus/usb/devices and blacklists+unloads scanner.o if necessary.
Please remove the above two lines from scanner.h in the various kernel trees, and please make a note for now to not add any more HP multi-function peripherals (OfficeJet, Printer/Scanner/Copier (PSC), LaserJet, or PhotoSmart printer) to this table.
(Please "reply to all", since I'm no longer subscribed to linux-usb-devel.)
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