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    SubjectRe: Oops in evdev_disconnect for kernel 2.6.23.12
    Hi Berthold.

    Berthold Cogel wrote:
    > Jan 1 17:34:39 wonderland kernel: usb 2-2: USB disconnect, address 3
    > Jan 1 17:34:39 wonderland kernel: usb 2-2.5: USB disconnect, address 4
    > Jan 1 17:34:39 wonderland kernel: drivers/input/tablet/wacom_sys.c:
    > wacom_sys_irq - usb_submit_urb failed with result -19
    > Jan 1 17:34:39 wonderland kernel: usb 2-2.6: USB disconnect, address 5
    > Jan 1 17:34:39 wonderland kernel: BUG: unable to handle kernel paging
    > request at virtual address 00100100
    > Jan 1 17:34:39 wonderland kernel: printing eip:
    > Jan 1 17:34:39 wonderland kernel: f8819668
    > Jan 1 17:34:39 wonderland kernel: *pde = 00000000
    > Jan 1 17:34:39 wonderland kernel: Oops: 0000 [#1]
    > Jan 1 17:34:39 wonderland kernel: PREEMPT
    > Jan 1 17:34:39 wonderland kernel: Modules linked in: isofs
    > nls_iso8859_1 nls_cp437 vfat fat radeon drm rfcomm l2cap bluetooth ppdev
    > lp fan ac battery joydev dm_crypt wacom dm_snapshot dm_mirror sr_mod
    > sd_mod sbp2 usbhid hid ff_memless usb_storage snd_emu10k1_synth
    > snd_emux_synth snd_seq_virmidi snd_seq_midi_emul snd_emu10k1
    > firmware_class snd_ac97_codec ac97_bus snd_util_mem snd_hwdep
    > snd_pcm_oss snd_pcm snd_page_alloc snd_mixer_oss snd_seq_dummy
    > snd_seq_oss snd_seq_midi snd_rawmidi snd_seq_midi_event snd_seq
    > snd_timer snd_seq_device parport_pc parport rtc i2c_viapro ohci1394
    > via_agp ide_cd agpgart snd ehci_hcd emu10k1_gp gameport 8139too
    > soundcore thermal uhci_hcd ieee1394 processor button evdev
    > Jan 1 17:34:39 wonderland kernel: CPU: 0
    > Jan 1 17:34:39 wonderland kernel: EIP: 0060:[<f8819668>] Not
    > tainted VLI
    > Jan 1 17:34:39 wonderland kernel: EFLAGS: 00010206 (2.6.23.12 #1)
    > Jan 1 17:34:39 wonderland kernel: EIP is at evdev_disconnect+0x65/0x9e
    > [evdev]
    > Jan 1 17:34:39 wonderland kernel: eax: 00000000 ebx: 000ffcf0 ecx:
    > c1926760 edx: 00000033
    > Jan 1 17:34:39 wonderland kernel: esi: f7415600 edi: f741564c ebp:
    > f7415654 esp: c1967e68
    > Jan 1 17:34:39 wonderland kernel: ds: 007b es: 007b fs: 0000 gs:
    > 0000 ss: 0068
    > Jan 1 17:34:39 wonderland kernel: Process khubd (pid: 136, ti=c1966000
    > task=c1926570 task.ti=c1966000)
    > Jan 1 17:34:39 wonderland kernel: Stack: f7415800 f7402000 f7402758
    > f740276c f7b94458 c03454b2 00000000 c03c6eb6
    > Jan 1 17:34:39 wonderland kernel: f7bda054 c029178a f788f520
    > f7bda000 f9b3c608 f9b3a3ab f7bda000 f7bda000
    > Jan 1 17:34:39 wonderland kernel: f7bda01c c0337954 f7bda01c
    > f9b3c638 00000000 c02fdb59 f7bda01c f7bda01c
    > Jan 1 17:34:39 wonderland kernel: Call Trace:
    > Jan 1 17:34:39 wonderland kernel: [<c03454b2>]
    > input_unregister_device+0x6f/0xff
    > Jan 1 17:34:39 wonderland kernel: [<c03c6eb6>] klist_release+0x27/0x30
    > Jan 1 17:34:39 wonderland kernel: [<c029178a>] kref_put+0x5f/0x6c
    > Jan 1 17:34:39 wonderland kernel: [<f9b3a3ab>]
    > wacom_disconnect+0x2b/0x66 [wacom]
    > Jan 1 17:34:39 wonderland kernel: [<c0337954>]
    > usb_unbind_interface+0x2d/0x6e
    > Jan 1 17:34:39 wonderland kernel: [<c02fdb59>]
    > __device_release_driver+0x6e/0x8b
    > Jan 1 17:34:39 wonderland kernel: [<c02fdeaf>]
    > device_release_driver+0x1d/0x32
    > Jan 1 17:34:39 wonderland kernel: [<c02fd599>]
    > bus_remove_device+0x6a/0x7a
    > Jan 1 17:34:39 wonderland kernel: [<c02fbde3>] device_del+0x1c3/0x234
    > Jan 1 17:34:39 wonderland kernel: [<c033567f>]
    > usb_disable_device+0x5c/0xbb
    > Jan 1 17:34:39 wonderland kernel: [<c0331ff9>] usb_disconnect+0x7e/0xe6
    > Jan 1 17:34:39 wonderland kernel: [<c0331fea>] usb_disconnect+0x6f/0xe6
    > Jan 1 17:34:39 wonderland kernel: [<c03324db>] hub_thread+0x31c/0xa10
    > Jan 1 17:34:39 wonderland kernel: [<c0114e17>] update_curr+0x102/0x12c
    > Jan 1 17:34:39 wonderland kernel: [<c0114a13>]
    > update_stats_wait_end+0x96/0xb9
    > Jan 1 17:34:39 wonderland kernel: [<c01281c7>]
    > autoremove_wake_function+0x0/0x33
    > Jan 1 17:34:39 wonderland kernel: [<c03321bf>] hub_thread+0x0/0xa10
    > Jan 1 17:34:39 wonderland kernel: [<c012810e>] kthread+0x36/0x5c
    > Jan 1 17:34:39 wonderland kernel: [<c01280d8>] kthread+0x0/0x5c
    > Jan 1 17:34:39 wonderland kernel: [<c01048f7>]
    > kernel_thread_helper+0x7/0x10
    > Jan 1 17:34:39 wonderland kernel: =======================
    > Jan 1 17:34:39 wonderland kernel: Code: 5e 4c 81 eb 10 04 00 00 eb 21
    > 8d 83 08 04 00 00 b9 06 00 02 00 ba 1d 00 00 00 e8 6a 93 95 c7 8b 9b 10
    > 04 00 00 81 eb 10 04 00 00 <8b> 83 10 04 00 00 0f 18 00 90 8d 83 10 04
    > 00 00 39 f8 75 cb 8d
    > Jan 1 17:34:39 wonderland kernel: EIP: [<f8819668>]
    > evdev_disconnect+0x65/0x9e [evdev] SS:ESP 0068:c1967e68
    >
    >
    > I'm using Debian stable/testing/unstable with homemade kernel 2.6.23.12
    > (patched with tuxonice-3.0-rc3-for-2.6.23.9).
    >
    > I tried to get my Wacom Bamboo grafic tablet to work with linux and the
    > xorg driver from linuxwacom-0.7.9-4
    > (http://linuxwacom.sourceforge.net/). After 'configure/make/make
    > install' from source and configuring Xorg, I got the tablet working for
    > a simple user. But each time I tried to login with X as root (I know
    > .... Bad idea .... :-)) xserver got restarted. I tried to trace the
    > situation with stracing gdm. I did this via an ssh session from a second
    > computer. Because I tried to follow the forks, I had to kill strace
    > after this. Some time after the 'kill', while examining the trace files,
    > I recognised the Oops in the window with the ssh session on the second
    > computer. The system is still up and running with X.
    >
    > At the top of the log extract, you can see USB disconnect messages,
    > perhaps leading to the Oops. That's strange because I haven't
    > disconneted any USB device. The tablet is still connected to the system
    > while I write this.
    >
    > lspci
    > 00:00.0 Host bridge: VIA Technologies, Inc. VT8366/A/7 [Apollo KT266/A/333]
    > 00:01.0 PCI bridge: VIA Technologies, Inc. VT8366/A/7 [Apollo
    > KT266/A/333 AGP]
    > 00:06.0 RAID bus controller: Promise Technology, Inc. PDC20276
    > (MBFastTrak133 Lite) (rev 01)
    > 00:07.0 FireWire (IEEE 1394): Texas Instruments TSB43AB22/A
    > IEEE-1394a-2000 Controller (PHY/Link)
    > 00:09.0 USB Controller: VIA Technologies, Inc. VT82xxxxx UHCI USB 1.1
    > Controller (rev 50)
    > 00:09.1 USB Controller: VIA Technologies, Inc. VT82xxxxx UHCI USB 1.1
    > Controller (rev 50)
    > 00:09.2 USB Controller: VIA Technologies, Inc. USB 2.0 (rev 51)
    > 00:0e.0 Ethernet controller: Realtek Semiconductor Co., Ltd.
    > RTL-8139/8139C/8139C+ (rev 10)
    > 00:0f.0 Multimedia audio controller: Creative Labs SB Live! EMU10k1 (rev
    > 07)
    > 00:0f.1 Input device controller: Creative Labs SB Live! Game Port (rev 07)
    > 00:11.0 ISA bridge: VIA Technologies, Inc. VT8233A ISA Bridge
    > 00:11.1 IDE interface: VIA Technologies, Inc.
    > VT82C586A/B/VT82C686/A/B/VT823x/A/C PIPC Bus Master IDE (rev 06)
    > 00:11.2 USB Controller: VIA Technologies, Inc. VT82xxxxx UHCI USB 1.1
    > Controller (rev 23)
    > 00:11.3 USB Controller: VIA Technologies, Inc. VT82xxxxx UHCI USB 1.1
    > Controller (rev 23)
    > 01:00.0 VGA compatible controller: ATI Technologies Inc RV350 AR [Radeon
    > 9600]
    > 01:00.1 Display controller: ATI Technologies Inc RV350 AR [Radeon 9600]
    > (Secondary)
    >
    > The USB system seems to be a wreck at the moment after the Oops. lsusb
    > and usbview don't work. But keyboard and trackball are still working.

    If you can reproduce it, would you please send the information to the
    USB maintainers? I don't modify USB drivers, so it will be an issue in
    vanilla. Even if you can't reproduce it immediately, they may well like
    to see this report.

    Regards,

    Nigel


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