Bug#513894: Re: Bug#513894: Oops: f3 with i2c-tiny-usbHello,
Hi,
You are using a heavily modified homemade version of the i2c-tiny-usb
on some embedded arm plattform. You are even using a different
CPU on the i2c-tiny-usb. Honestly, i don't fully understand what you expect
me to do? I don't even have access to your hardware. How am i supposed
to debug such an issue?
The origin of the problems seem to be a failing i2c-tiny-usb hardware
or at least failing usb transfers to that device. This is a device you built
and this is something you'll probably have to figure out yourself.
The fact that there's some nasty crash in the drivers involved in this is
another issue. This shouldn't happen even if your modified i2c-tiny-usb
is unable to provide reliable USB transfers. To solve this i suggest you
test some things like e.g.:
a) verify that an original i2c-tiny-usb also triggers the same problem,
so we at least have a chance to reproduce this
b) verify that these crashes also happen with other plattforms (e.g. a
standard x86 unit)
c) verify if this also happens with different client hardware attached to
the i2c-tiny-usb
d) verify that these crashes also happen with a different usb controller
(e.g. a ohci one versus a uhci one)
>From the oops i can only see that there's some crash that seems to
be happening somewhere inside the i2c system. I can't even tell if
it actually is my driver crashing. So you might want to add some
debug printk()'s to the functions you expect to be involved in this. This
way you should easily be able to tell if the crash happens inside
the i2c-tiny-usb driver or in some other part.
Till
----- original Nachricht --------
Betreff: Re: Bug#513894: Oops: f3 with i2c-tiny-usbHello,
Gesendet: Di, 17. Feb 2009
Von: Thomas Koch<tom-koch@gmx.de>
> Hello Mr. Harbaum,
>
> First of all thanks for the feedback.
> You did a great job by developing this interface!
>
> The PCB is home made but the hardware on the i2c - bus is working perfectly
>
> with an ELV Parport interface on a different machine with suse 10.3.
> I tried to migrate the system to a low power consumption system.
>
> The interface is also ported from the tiny to a mega32 and connected to an
> active powered usb hub.
>
> I can see several disconnects and this error occurs directly after an
> reconnect:
>
> This is the actual syslog message:
> Feb 16 06:25:08 fhz kernel: [43029038.330000] i2c-adapter i2c-1: failure
> reading status
> Feb 16 06:25:08 fhz kernel: [43029038.430000] hub 1-1:1.0: port 1 disabled
> by
> hub (EMI?), re-enabling...
> Feb 16 06:25:08 fhz kernel: [43029038.440000] usb 1-1.1: USB disconnect,
> address 9
> Feb 16 06:25:08 fhz kernel: [43029038.530000] usb 1-1.1: new low speed USB
> device using ehci_hcd and address 10
> Feb 16 06:25:08 fhz kernel: [43029038.650000] usb 1-1.1: configuration #1
> chosen from 1 choice
> Feb 16 06:25:08 fhz kernel: [43029038.660000] i2c-tiny-usb 1-1.1:1.0:
> version
> 2.05 found at bus 001 address 010
> Feb 16 06:25:08 fhz kernel: [43029038.690000] i2c-adapter i2c-1: connected
> i2c-tiny-usb device
> Feb 16 06:25:08 fhz kernel: [43029038.690000] usb 1-1.1: New USB device
> found,
> idVendor=0403, idProduct=c631
> Feb 16 06:25:08 fhz kernel: [43029038.700000] usb 1-1.1: New USB device
> strings: Mfr=1, Product=2, SerialNumber=0
> Feb 16 06:25:08 fhz kernel: [43029038.710000] usb 1-1.1: Product:
> i2c-tiny-usb
> Feb 16 06:25:08 fhz kernel: [43029038.710000] usb 1-1.1: Manufacturer: Till
>
> Harbaum
> Feb 16 06:25:08 fhz kernel: [43029104.230000] hub 1-1:1.0: port 1 disabled
> by
> hub (EMI?), re-enabling...
> Feb 16 06:25:08 fhz kernel: [43029104.230000] usb 1-1.1: USB disconnect,
> address 10
> Feb 16 06:25:08 fhz kernel: [43029104.330000] usb 1-1.1: new low speed USB
> device using ehci_hcd and address 11
> Feb 16 06:25:08 fhz kernel: [43029104.450000] usb 1-1.1: configuration #1
> chosen from 1 choice
> Feb 16 06:25:08 fhz kernel: [43029104.460000] i2c-tiny-usb 1-1.1:1.0:
> version
> 2.05 found at bus 001 address 011
> Feb 16 06:25:08 fhz kernel: [43029104.480000] i2c-adapter i2c-1: connected
> i2c-tiny-usb device
> Feb 16 06:25:08 fhz kernel: [43029104.490000] Unable to handle kernel paging
>
> request at virtual address 00c0ec10
> Feb 16 06:25:08 fhz kernel: [43029104.490000] pgd = c0004000
> Feb 16 06:25:08 fhz kernel: [43029104.490000] [00c0ec10] *pgd=00000000
> Feb 16 06:25:08 fhz kernel: [43029104.490000] Internal error: Oops: f5 [#2]
> Feb 16 06:25:08 fhz kernel: [43029104.490000] Modules linked in: ipv6 nfsd
> auth_rpcgss exportfs nfs lockd nfs_acl sunrpc nls_utf8 ntfs nls_base ext2
> evdev usbhid ftdi_sio i2c_tiny_usb hid ff_memless ixp4xx_eth usbserial
> ixp4xx_npe firmware_class ixp4xx_beeper ixp4xx_qmgr ohci_hcd ext3 jbd
> mbcache
> sd_mod ehci_hcd usb_storage usbcore scsi_mod
> Feb 16 06:25:08 fhz kernel: [43029104.490000] CPU: 0 Tainted: G D
>
> (2.6.26-1-ixp4xx #1)
> Feb 16 06:25:08 fhz kernel: [43029104.490000] PC is at __up+0x10/0x4c
> Feb 16 06:25:08 fhz kernel: [43029104.490000] LR is at up+0x3c/0x44
> Feb 16 06:25:08 fhz kernel: [43029104.490000] pc : [<c021ccec>] lr :
> [<c0056bc8>] psr: 00000093
> Feb 16 06:25:08 fhz kernel: [43029104.490000] sp : c0e5dd38 ip : c0e5dd48
>
> fp : c0e5dd44
> Feb 16 06:25:08 fhz kernel: [43029104.490000] r10: c0f44ce0 r9 : 00000000
>
> r8 : bf03b9dc
> Feb 16 06:25:08 fhz kernel: [43029104.490000] r7 : 00000000 r6 : c0ec10c8
>
> r5 : 00000001 r4 : 60000013
> Feb 16 06:25:08 fhz kernel: [43029104.490000] r3 : c0ec10cc r2 : 00c0ec10
>
> r1 : 00000041 r0 : c0ec10c8
> Feb 16 06:25:08 fhz kernel: [43029104.490000] Flags: nzcv IRQs off FIQs on
>
> Mode SVC_32 ISA ARM Segment kernel
> Feb 16 06:25:08 fhz kernel: [43029104.490000] Control: 0000397f Table:
> 00734000 DAC: 00000017
> Feb 16 06:25:08 fhz kernel: [43029104.490000] Process khubd (pid: 289, stack
>
> limit = 0xc0e5c268)
> Feb 16 06:25:08 fhz kernel: [43029104.490000] Stack: (0xc0e5dd38 to
> 0xc0e5e000)
> Feb 16 06:25:08 fhz kernel: [43029104.490000] dd20:
>
> c0e5dd5c c0e5dd48
> Feb 16 06:25:08 fhz kernel: [43029104.490000] dd40: c0056bc8 c021cce8
> c0ec1020
> c0ec1020 c0e5dd7c c0e5dd60 c0172218 c0056b98
> Feb 16 06:25:08 fhz kernel: [43029104.490000] dd60: c0ea6000 bf03b9f4
> c0ec1020
> c0ec10ac c0e5dd94 c0e5dd80 c01711b0 c01721bc
> Feb 16 06:25:08 fhz kernel: [43029104.490000] dd80: c0ec1020 c0ea6000
> c0e5ddcc
> c0e5dd98 c0170050 c017118c c0ea6060 c0ec1088
> Feb 16 06:25:08 fhz kernel: [43029104.490000] dda0: c013e008 c0ec1000
> c0ea6000
> c0f47800 00000000 00000000 00000000 c0f44ce0
> Feb 16 06:25:08 fhz kernel: [43029104.490000] ddc0: c0e5de2c c0e5ddd0
> bf024310
> c016fd20 00000001 00000000 00000000 00000000
> Feb 16 06:25:08 fhz kernel: [43029104.490000] dde0: 00001388 c0e5ddfc
> c09f41e0
> 00000001 00000000 c0f47804 c0f47800 00000001
> Feb 16 06:25:08 fhz kernel: [43029104.490000] de00: c0ea60ec c0ea6000
> 00000001
> bf03bfbc 00000000 bf03b8a8 00000000 c0e57400
> Feb 16 06:25:08 fhz kernel: [43029104.490000] de20: c0e5de54 c0e5de30
> bf02b0c0
> bf023f14 00000000 00000000 c0e5de64 c0ea6060
> Feb 16 06:25:08 fhz kernel: [43029104.490000] de40: c0172170 bf03bfbc
> c0e5de64
> c0e5de58 bf025438 bf02b078 c0e5de84 c0e5de68
> Feb 16 06:25:08 fhz kernel: [43029104.490000] de60: c0172048 bf0253fc
> c0217ed0
> 00000000 c0172170 c0ea6060 c0e5de94 c0e5de88
> Feb 16 06:25:08 fhz kernel: [43029104.490000] de80: c0172180 c0171f60
> c0e5dec4
> c0e5de98 c017137c c017217c 000000d0 c0e62f28
> Feb 16 06:25:08 fhz kernel: [43029104.490000] dea0: c0e62f28 c0e09dd4
> c0e173a0
> c0ea6060 c0ea6060 c0ea6108 c0e5dee4 c0e5dec8
> Feb 16 06:25:08 fhz kernel: [43029104.490000] dec0: c017220c c0171338
> c0ea6060
> bf03b9f4 c0ea6060 c0ea60ec c0e5defc c0e5dee8
>
>
>
> What I also noticed is when I do an i2cdetect the bus type of the interface
> is
> shown as dummy. Normaly the type is i2c.
>
>
> Thanks,
> Thomas.
>
>
> Am Montag 09 Februar 2009 20:29:04 schrieb Till Harbaum:
> > Hi,
> >
> > this is an unknown problem. In fact it's the first time i ever got an
> error
> > report for the device. And therefore there isn't any patch.
> >
> > There seems to be a usb write error. This is a diy hardware. There may
> > be several reasons causing such problems:
> >
> > Hardware problems on the i2c-tiny-usb:
> > - Have correct zener diodes (fast ones!) been used?
> > - Is the PCB home made? If yes is it really reliable?
> > - How long is the usb cable?
> >
> > General problems:
> > - What is connected to the i2c-tiny-usb?
> > - How much power does it draw?
> > - Is the nslu really able to power everything via usb?
> > (e.g. what happens if the i2c-tiny-usb is connected
> > through a self powered hub?)
> >
> > Maybe the arm kernel barfs on i2c/usb transfer problems?
> >
> > Till
> >
> > Am Montag 09 Februar 2009 schrieb Martin Michlmayr:
> > > Hi Till and other I2C developers,
> > >
> > > Thomas Koch, a Debian user, reported the following backtrace with
> > > 2.6.26 related to i2c and possibly related to the i2c-tiny-usb driver.
> > > This is on an ARM device.
> > >
> > > Do you know if this is a known issue for which a patch is available in
> > > newer kernels, or is this a new bug?
> > >
> > > > [42994982.810000] Unable to handle kernel paging request at virtual
> > > > address 692f7473 [42994982.810000] pgd = c1da0000
> > > > [42994982.810000] [692f7473] *pgd=00000000
> > > > [42994982.810000] Internal error: Oops: f3 [#2]
> > > > [42994982.810000] Modules linked in: ipv6 nfsd auth_rpcgss exportfs
> nfs
> > > > lockd nfs_acl sunrpc nls_utf8 ntfs nls_base ext2 evdev ftdi_sio
> usbhid
> > > > hid i2c_tiny_usb ff_memless usbserial ixp4xx_eth ixp4xx_npe
> > > > firmware_class ixp4xx_qmgr ixp4xx_beeper ohci_hcd ext3 jbd mbcache
> > > > sd_mod ehci_hcd usb_storage usbcorescsi_mod [42994982.810000] CPU: 0
>
> > > > Tainted: G D (2.6.26-1-ixp4xx #1) [42994982.810000] PC is at
> > > > module_put+0x20/0x48
> > > > [42994982.810000] LR is at i2c_put_adapter+0x14/0x18
> > > > [42994982.810000] pc : [<c0060b00>] lr : [<c01940f4>] psr:
> > > > 20000093 [42994982.810000] sp : c0fc3c68 ip : c0fc3c78 fp :
> c0fc3c74
> > > > [42994982.810000] r10: c18d3dd8 r9 : c1c0d120 r8 : 00000000
> > > > [42994982.810000] r7 : c1c1a208 r6 : 00000008 r5 : c1daaac0 r4 :
> > > > c13fe000 [42994982.810000] r3 : 20000093 r2 : 20000013 r1 : c1daaac0
>
> > > > r0 : 692f7373 [42994982.810000] Flags: nzCv IRQs off FIQs on Mode
> > > > SVC_32 ISA ARM Segment user [42994982.810000] Control: 0000397f
> > > > Table: 01da0000 DAC: 00000015 [42994982.810000] Process hcontrol
> (pid:
> > > > 2671, stack limit = 0xc0fc2268) [42994982.810000] Stack: (0xc0fc3c68
> to
> > > > 0xc0fc4000)
> > > > [42994982.810000] 3c60: c0fc3c84 c0fc3c78 c01940f4
> > > > c0060aec c0fc3c9c c0fc3c88 [42994982.810000] 3c80: c0195d94 c01940ec
> > > > c1daaac0 c0f0ea60 c0fc3cd4 c0fc3ca0 c009813c c0195d84
> [42994982.810000]
> > > > 3ca0: 00000000 c0ef9d30 00000000 c1daaac0 c1c1a200 00000000 c1c1a208
> > > > 00000000 [42994982.810000] 3cc0: 000000f3 00000001 c0fc3ce4 c0fc3cd8
> > > > c00984c4 c0098090 c0fc3d04 c0fc3ce8 [42994982.810000] 3ce0: c0094dd0
> > > > c009849c c0f16e00 c1c1a200 00000003 0000000c c0fc3d2c c0fc3d08
> > > > [42994982.810000] 3d00: c0040980 c0094d64 c0f16e00 c0fc2000 c1e68060
> > > > 0000000b c01941f8 00000008 [42994982.810000] 3d20: c0fc3d3c c0fc3d30
> > > > c0040a00 c0040904 c0fc3d54 c0fc3d40 c0041cf8 c00409e4
> [42994982.810000]
> > > > 3d40: c003e550 c003e420 c0fc3d64 c0fc3d58 c0029de4 c0041aec c0fc3d84
> > > > c0fc3d68 [42994982.810000] 3d60: c002c460 c0029b70 c0fc3ea0 000000f3
> > > > 692f7265 c0fc3ea0 c0fc3dac c0fc3d88 [42994982.810000] 3d80: c002c718
> > > > c002c400 e5933000 c021db38 00000013 00000000 e5933000 00000000
> > > > [42994982.810000] 3da0: c0fc3dec c0fc3db0 c002e584 c002c6b4 00000000
> > > > c02c0a68 28841963 0000b229 [42994982.810000] 3dc0: c0fc3df4 ffffffff
> > > > c02bc1bc 000000f3 c0fc3ea0 692f7265 60000013 00000000
> [42994982.810000]
> > > > 3de0: c0fc3e9c c0fc3df0 c00251f0 c002e150 c005b76c c02bc4cc c0fc3e24
> > > > c0fc3e08 [42994982.810000] 3e00: c003080c c00307a8 c02c1680 c02c1680
> > > > 00000005 00000000 c0fc3e3c c0fc3e28 [42994982.810000] 3e20: c0043e2c
> > > > c0037468 00000005 00000005 c0fc3e5c c0fc3e40 c002504c c0043dd4
> > > > [42994982.810000] 3e40: c005b878 ffffffff 0000001f 00000020 c0fc3eec
> > > > c0fc3e60 c00256b0 c002500c [42994982.810000] 3e60: 00000001 c02c0a70
> > > > c0f374c0 00000001 2883b65f 0000b229 c0fc3f10 ffffffff
> [42994982.810000]
> > > > 3e80: c0fc3ed4 be932b55 c051d360 c0025c48 c0fc3f04 c0fc3ea0 c002566c
> > > > c00251c0 [42994982.810000] 3ea0: c0fc2028 c0fc3f0c 00000001 692f7265
> > > > c1c73a08 00000001 be932b55 c051d360 [42994982.810000] 3ec0: c0025c48
> > > > c0fc2000 00000000 c0fc3f04 c0fc3f08 c0fc3ee8 c0194cd4 c01941f8
> > > > [42994982.810000] 3ee0: a0000013 ffffffff 00000001 00000001 be932b55
> > > > c051d360 c0fc3f2c c0fc3f08 [42994982.810000] 3f00: c0194cd4 c01941ec
> > > > c0fc3f4c 0001004b c13f0001 c051d360 be932b55 fffffff4
> [42994982.810000]
> > > > 3f20: c0fc3f4c c0fc3f30 c01961ac c0194c98 c1daaac0 be932b55 c0fc3f78
> > > > 00000001 [42994982.810000] 3f40: c0fc3f74 c0fc3f50 c0097778 c0196170
> > > > 006d6561 00000a6f c1daaac0 fffffff7 [42994982.810000] 3f60: 00000000
> > > > 00000000 c0fc3fa4 c0fc3f78 c0097c44 c00976d0 00000000 00000000
> > > > [42994982.810000] 3f80: 00000000 00000000 0000d6fc 00000000 000090a0
> > > > 00000003 00000000 c0fc3fa8 [42994982.810000] 3fa0: c0025aa0 c0097c0c
> > > > 0000d6fc 00000000 00000003 be932b55 00000001 be932b55
> [42994982.810000]
> > > > 3fc0: 0000d6fc 00000000 000090a0 00000003 00000000 00000000 40025000
> > > > be932b6c [42994982.810000] 3fe0: 00000000 be932a40 0000b4ac 40209eac
> > > > 40000010 00000003 0002003d 00000000 [42994982.810000] Backtrace:
> > > > [42994982.810000] [<c0060ae0>] (module_put+0x0/0x48) from
> [<c01940f4>]
> > > > (i2c_put_adapter+0x14/0x18) [42994982.810000] [<c01940e0>]
> > > > (i2c_put_adapter+0x0/0x18) from [<c0195d94>]
> (i2cdev_release+0x1c/0x30)
> > > > [42994982.810000] [<c0195d78>] (i2cdev_release+0x0/0x30) from
> > > > [<c009813c>] (__fput+0xb8/0x178) [42994982.810000] r5:c0f0ea60
> > > > r4:c1daaac0
> > > > [42994982.810000] [<c0098084>] (__fput+0x0/0x178) from [<c00984c4>]
> > > > (fput+0x34/0x38) [42994982.810000] [<c0098490>] (fput+0x0/0x38) from
> > > > [<c0094dd0>] (filp_close+0x78/0x84) [42994982.810000] [<c0094d58>]
> > > > (filp_close+0x0/0x84) from [<c0040980>] (put_files_struct+0x88/0xe0)
> > > > [42994982.810000] r6:0000000c r5:00000003 r4:c1c1a200
> > > > [42994982.810000] [<c00408f8>] (put_files_struct+0x0/0xe0) from
> > > > [<c0040a00>] (exit_files+0x28/0x2c) [42994982.810000] r8:00000008
> > > > r7:c01941f8 r6:0000000b r5:c1e68060 r4:c0fc2000 [42994982.810000]
> > > > [<c00409d8>] (exit_files+0x0/0x2c) from [<c0041cf8>]
> > > > (do_exit+0x218/0x6a4) [42994982.810000] [<c0041ae0>]
> > > > (do_exit+0x0/0x6a4) from [<c0029de4>] (die+0x280/0x304)
> > > > [42994982.810000] [<c0029b64>] (die+0x0/0x304) from [<c002c460>]
> > > > (__do_kernel_fault+0x6c/0x80) [42994982.810000] [<c002c3f4>]
> > > > (__do_kernel_fault+0x0/0x80) from [<c002c718>]
> (do_bad_area+0x70/0x7c)
> > > > [42994982.810000] r7:c0fc3ea0 r6:692f7265 r5:000000f3 r4:c0fc3ea0
> > > > [42994982.810000] [<c002c6a8>] (do_bad_area+0x0/0x7c) from
> [<c002e584>]
> > > > (do_alignment+0x440/0x59c) [42994982.810000] r6:00000000 r5:e5933000
> > > > r4:00000000
> > > > [42994982.810000] [<c002e144>] (do_alignment+0x0/0x59c) from
> > > > [<c00251f0>] (do_DataAbort+0x3c/0xa0) [42994982.810000] [<c00251b4>]
> > > > (do_DataAbort+0x0/0xa0) from [<c002566c>] (__dabt_svc+0x4c/0x60)
> > > > [42994982.810000] Exception stack(0xc0fc3ea0 to 0xc0fc3ee8)
> > > > [42994982.810000] 3ea0: c0fc2028 c0fc3f0c 00000001 692f7265 c1c73a08
> > > > 00000001 be932b55 c051d360 [42994982.810000] 3ec0: c0025c48 c0fc2000
> > > > 00000000 c0fc3f04 c0fc3f08 c0fc3ee8 c0194cd4 c01941f8
> [42994982.810000]
> > > > 3ee0: a0000013 ffffffff
> > > > [42994982.810000] r8:c0025c48 r7:c051d360 r6:be932b55 r5:c0fc3ed4
> > > > r4:ffffffff [42994982.810000] [<c01941e0>] (i2c_transfer+0x0/0x98)
> from
> > > > [<c0194cd4>] (i2c_master_recv+0x48/0x58) [42994982.810000]
> r7:c051d360
> > > > r6:be932b55 r5:00000001 r4:00000001 [42994982.810000] [<c0194c8c>]
> > > > (i2c_master_recv+0x0/0x58) from [<c01961ac>] (i2cdev_read+0x48/0xa0)
> > > > [42994982.810000] r4:fffffff4
> > > > [42994982.810000] [<c0196164>] (i2cdev_read+0x0/0xa0) from
> [<c0097778>]
> > > > (vfs_read+0xb4/0x18c) [42994982.810000] r7:00000001 r6:c0fc3f78
> > > > r5:be932b55 r4:c1daaac0 [42994982.810000] [<c00976c4>]
> > > > (vfs_read+0x0/0x18c) from [<c0097c44>] (sys_read+0x44/0x70)
> > > > [42994982.810000] r7:00000000 r6:00000000 r5:fffffff7 r4:c1daaac0
> > > > [42994982.810000] [<c0097c00>] (sys_read+0x0/0x70) from [<c0025aa0>]
> > > > (ret_fast_syscall+0x0/0x2c) [42994982.810000] r7:00000003
> r6:000090a0
> > > > r5:00000000 r4:0000d6fc [42994982.810000] Code: 0a00000b e10f2000
> > > > e3823080 e121f003 (e5903100) [42994983.440000] ---[ end trace
> > > > 051f259b86cac584 ]---
> > >
> > > and:
> > >
> > > * Thomas Koch <tom-koch@gmx.de> [2009-02-04 05:12]:
> > > > > Can you please tell us more: when does this happen, how often, how
> > > > > reliably can you reproduce this problem, etc?
> > > >
> > > > This happens several times a day.
> > > > The system is a linksys nslu2.
> > > > It looks like it has something to do with the i2c-tiny-usb driver.
> > > >
> > > > [43177942.750000] i2c-adapter i2c-1: failure writing data
> > > > [43177942.880000] hub 1-1:1.0: port 1 disabled by hub (EMI?),
> > > > re-enabling... [43177942.880000] usb 1-1.1: USB disconnect, address
> 17
> > > > [43177942.970000] usb 1-1.1: new low speed USB device using ehci_hcd
> > > > and address 18
> > > > [43177943.090000] usb 1-1.1: configuration #1 chosen from 1 choice
> > > > [43177943.100000] i2c-tiny-usb 1-1.1:1.0: version 2.05 found at bus
> 001
> > > > address 018
> > > > [43177943.130000] i2c-adapter i2c-1: connected i2c-tiny-usb device
> > > > [43177943.140000] usb 1-1.1: New USB device found, idVendor=0403,
> > > > idProduct=c631
> > > > [43177943.140000] usb 1-1.1: New USB device strings: Mfr=1,
> Product=2,
> > > > SerialNumber=0
> > > > [43177943.150000] usb 1-1.1: Product: i2c-tiny-usb
> > > > [43177943.160000] usb 1-1.1: Manufacturer: Till Harbaum
> > > >
> > > > Most of the time I can see it after the device is registered again.
> > > >
> > > > Thanks,
> > > > Thomas
>
>
>
--- original Nachricht Ende ----
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