Hello,
I'm having a bit of trouble with hidraw (with a USB device) and device
removal. When I remove a device and re-attach it, the original device
does not get removed, and another node is added to /dev.
At boot:
no /dev/hidraw devices exist
attach a device:
/dev/hidraw0 exists
detach the device:
/dev/hidraw0 remains
re-attach the device:
/dev/hidraw0 exists (defunct)
/dev/hidraw1 exists
This is with 2.6.35+ from git, revision 3d30701b58970425e1d, updated
about 30 minutes ago.
Aug 11 11:04:15 ato kernel: [ 109.554287] ------------[ cut here
]------------
Aug 11 11:04:15 ato kernel: [ 109.554300] WARNING: at lib/kobject.c:595
kobject_put+0x50/0x60()
Aug 11 11:04:15 ato kernel: [ 109.554306] Hardware name: GA-MA770T-UD3P
Aug 11 11:04:15 ato kernel: [ 109.554311] kobject: '(null)'
(ffff880244a49898): is not initialized, yet kobject_put() is being called.
Aug 11 11:04:15 ato kernel: [ 109.554317] Modules linked in: usbhid hid
binfmt_misc fbcon tileblit font bitblit softcursor snd_hda_codec_nvhdmi
nouveau snd_hda_codec_realtek snd_hda_intel snd_hda_codec snd_hwdep
snd_pcm_oss ttm drm_kms_helper snd_mixer_oss snd_pcm drm snd_seq_dummy
snd_seq_oss snd_seq_midi snd_rawmidi ppdev parport_pc snd_seq_midi_event
snd_seq psmouse lp snd_timer parport i2c_algo_bit edac_core video
edac_mce_amd i2c_piix4 snd_seq_device serio_raw snd soundcore
snd_page_alloc output ohci1394 floppy pata_atiixp ieee1394 ahci libahci
r8169 mii
Aug 11 11:04:15 ato kernel: [ 109.554399] Pid: 29, comm: khubd Not
tainted 2.6.35+ #19
Aug 11 11:04:15 ato kernel: [ 109.554404] Call Trace:
Aug 11 11:04:15 ato kernel: [ 109.554416] [<ffffffff8105de1f>]
warn_slowpath_common+0x7f/0xc0
Aug 11 11:04:15 ato kernel: [ 109.554425] [<ffffffff8105df16>]
warn_slowpath_fmt+0x46/0x50
Aug 11 11:04:15 ato kernel: [ 109.554434] [<ffffffff812a47c0>]
kobject_put+0x50/0x60
Aug 11 11:04:15 ato kernel: [ 109.554442] [<ffffffff8135c6b7>]
put_device+0x17/0x20
Aug 11 11:04:15 ato kernel: [ 109.554455] [<ffffffffa0238998>]
hid_destroy_device+0x48/0x60 [hid]
Aug 11 11:04:15 ato kernel: [ 109.554466] [<ffffffffa00f2aeb>]
usbhid_disconnect+0x2b/0x50 [usbhid]
Aug 11 11:04:15 ato kernel: [ 109.554477] [<ffffffff813d620a>]
usb_unbind_interface+0x5a/0x1a0
Aug 11 11:04:15 ato kernel: [ 109.554487] [<ffffffff81360645>]
__device_release_driver+0x75/0xe0
Aug 11 11:04:15 ato kernel: [ 109.554495] [<ffffffff813607ad>]
device_release_driver+0x2d/0x40
Aug 11 11:04:15 ato kernel: [ 109.554503] [<ffffffff8135f79e>]
bus_remove_device+0xae/0xf0
Aug 11 11:04:15 ato kernel: [ 109.554510] [<ffffffff8135d437>]
device_del+0x127/0x1d0
Aug 11 11:04:15 ato kernel: [ 109.554519] [<ffffffff813d2b88>]
usb_disable_device+0xa8/0x130
Aug 11 11:04:15 ato kernel: [ 109.554527] [<ffffffff813cbe65>]
usb_disconnect+0x95/0x130
Aug 11 11:04:15 ato kernel: [ 109.554535] [<ffffffff813cd51d>]
hub_thread+0x48d/0x1210
Aug 11 11:04:15 ato kernel: [ 109.554544] [<ffffffff8105771b>] ?
dequeue_task_fair+0x8b/0x90
Aug 11 11:04:15 ato kernel: [ 109.554555] [<ffffffff8107e490>] ?
autoremove_wake_function+0x0/0x40
Aug 11 11:04:15 ato kernel: [ 109.554563] [<ffffffff813cd090>] ?
hub_thread+0x0/0x1210
Aug 11 11:04:15 ato kernel: [ 109.554571] [<ffffffff8107df36>]
kthread+0x96/0xa0
Aug 11 11:04:15 ato kernel: [ 109.554580] [<ffffffff8100be64>]
kernel_thread_helper+0x4/0x10
Aug 11 11:04:15 ato kernel: [ 109.554588] [<ffffffff8107dea0>] ?
kthread+0x0/0xa0
Aug 11 11:04:15 ato kernel: [ 109.554595] [<ffffffff8100be60>] ?
kernel_thread_helper+0x0/0x10
Aug 11 11:04:15 ato kernel: [ 109.554601] ---[ end trace
212263bbb326ec69 ]---
Aug 11 11:04:21 ato kernel: [ 116.450553] usb 1-5.4: new full speed USB
device using ehci_hcd and address 7
Aug 11 11:04:22 ato kernel: [ 116.576230] generic-usb
0003:04D8:003F.0002: hiddev0,hidraw1: USB HID v1.11 Device [Microchip
Technology Inc. Simple HID Device Demo] on usb-0000:00:12.2-5.4/input0
Aug 11 11:04:23 ato kernel: [ 117.746427] usb 1-5.4: USB disconnect,
address 7
Aug 11 11:04:23 ato kernel: [ 117.746500] ------------[ cut here
]------------
lan@ato:~/work/linux-2.6$ scripts/ver_linux
If some fields are empty or look unusual you may have an old version.
Compare to the current minimal requirements in Documentation/Changes.
Linux ato 2.6.35+ #19 SMP Wed Aug 11 10:53:49 EDT 2010 x86_64 GNU/Linux
Gnu C 4.4.3
Gnu make 3.81
binutils 2.20.1
util-linux 2.17.2
mount support
module-init-tools 3.11.1
e2fsprogs 1.41.11
pcmciautils 014
Linux C Library 2.11.1
Dynamic linker (ldd) 2.11.1
Procps 3.2.8
Net-tools 1.60
Kbd 1.15
Sh-utils 7.4
wireless-tools 30
Modules Loaded usbhid hid binfmt_misc fbcon tileblit font
bitblit softcursor snd_hda_codec_nvhdmi nouveau snd_hda_codec_realtek
snd_hda_intel snd_hda_codec snd_hwdep snd_pcm_oss ttm drm_kms_helper
snd_mixer_oss snd_pcm drm snd_seq_dummy snd_seq_oss snd_seq_midi
snd_rawmidi ppdev parport_pc snd_seq_midi_event snd_seq psmouse lp
snd_timer parport i2c_algo_bit edac_core video edac_mce_amd i2c_piix4
snd_seq_device serio_raw snd soundcore snd_page_alloc output ohci1394
floppy pata_atiixp ieee1394 ahci libahci r8169 mii
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