Alan Stern wrote: > Does that error string come from usb_strerror()? My copy of libusb is > rather old and doesn't seem to include that routine. It would help to see > the actual error code returned by usb_interrupt_write(). > >> Looking at lsusb, the device has one Configuration with bConfigurationValue >> 1, and one Interface with bInterfaceNumber 0. > > Then why does your program try to claim interface 1?
Cause I was trying 1 on a whim and forgot to change it back. Doing so doesn't change the result. >> Under this interface, it has two endpoints, 0x81, "EP 1 IN", and 0x02, "EP 1 >> OUT", > > Actually that's EP 2 OUT, not that it matters. Err, yeah. > Your timeout value of 2 ms seems rather low. You might want to increase > it. Other values don't make a difference... I started at 10. > Have you tried setting the usbfs_snoop=1 module parameter for usbcore? It > will dump your program's I/O activity to the system log. No, I didn't, but that's a good idea. Is there a way to change this on-the-fly through, say, sysfs? I couldn't rmmod usbcore without -f, and then re-modprobing it caused and oops (though I am on a relatively old kernel... 2.6.15.6). Mar 10 22:15:33 rider kernel: Unable to handle kernel paging request at virtual address f8854b60 Mar 10 22:15:33 rider kernel: printing eip: Mar 10 22:15:33 rider kernel: c0173851 Mar 10 22:15:33 rider kernel: *pde = 37c0e067 Mar 10 22:15:33 rider kernel: *pte = 00000000 Mar 10 22:15:33 rider kernel: Oops: 0000 [#1] Mar 10 22:15:33 rider kernel: PREEMPT SMP Mar 10 22:15:33 rider kernel: Modules linked in: iptable_filter ip_tables rtc thermal fan processor ipv6 dm_mirror eeprom w83627hf hwmon_vid hwmon i2c_isa nvidia autofs4 sk98lin snd_intel8x0 snd_ac97_codec snd_ac97_bus snd_pcm_oss snd_mixer_oss snd_pcm snd_timer snd skge i2c_i801 soundcore ide_cd crc32 i2c_core psmouse ohci1394 ieee1394 cdrom snd_page_alloc sd_mod Mar 10 22:15:33 rider kernel: CPU: 1 Mar 10 22:15:33 rider kernel: EIP: 0060:[<c0173851>] Tainted: PF VLI Mar 10 22:15:33 rider kernel: EFLAGS: 00010246 (2.6.15.6rider-smp) Mar 10 22:15:33 rider kernel: EIP is at show_vfsmnt+0x78/0x15f Mar 10 22:15:33 rider kernel: eax: f8854b60 ebx: d48e12c0 ecx: d48e12c0 edx: 00000189 Mar 10 22:15:33 rider kernel: esi: c17e7b40 edi: d48e12c0 ebp: 00000000 esp: d3f01f18 Mar 10 22:15:33 rider kernel: ds: 007b es: 007b ss: 0068 Mar 10 22:15:33 rider kernel: Process sudo (pid: 4297, threadinfo=d3f00000 task=f7081030) Mar 10 22:15:33 rider kernel: Stack: d48e12c0 00000020 c02f8c8b c02f8c8b d48e12c0 c17e7b40 00000176 c0177b3f Mar 10 22:15:33 rider kernel: d48e12c0 c17e7b40 d3f01f4c 00000000 d48e12e0 00000009 00000000 00000008 Mar 10 22:15:33 rider kernel: 00000000 d6aa2740 00000400 d3f01fa4 00000000 c0157b9b d6aa2740 b7f52000 Mar 10 22:15:33 rider kernel: Call Trace: Mar 10 22:15:33 rider kernel: [<c0177b3f>] seq_read+0x1f3/0x2e4 Mar 10 22:15:33 rider kernel: [<c0157b9b>] vfs_read+0x9d/0x177 Mar 10 22:15:33 rider kernel: [<c0157f40>] sys_read+0x4b/0x74 Mar 10 22:15:33 rider kernel: [<c0102e2d>] syscall_call+0x7/0xb Mar 10 22:15:33 rider kernel: Code: 08 89 74 24 04 89 3c 24 e8 12 48 00 00 c7 44 24 04 20 00 00 00 89 3c 24 e8 18 4a 00 00 c7 44 24 08 8b 8c 2f c0 8b 46 14 8b 40 20 <8b> 00 89 44 24 04 89 3c 24 e8 d0 46 00 00 8b 56 14 b8 ea 9c 2f Thanks for your help Alan. -- Phil Dibowitz [EMAIL PROTECTED] Open Source software and tech docs Insanity Palace of Metallica http://www.phildev.net/ http://www.ipom.com/ "Never write it in C if you can do it in 'awk'; Never do it in 'awk' if 'sed' can handle it; Never use 'sed' when 'tr' can do the job; Never invoke 'tr' when 'cat' is sufficient; Avoid using 'cat' whenever possible" -- Taylor's Laws of Programming
signature.asc
Description: OpenPGP digital signature
------------------------------------------------------------------------- Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys-and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV
_______________________________________________ linux-usb-devel@lists.sourceforge.net To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel
