On Mon, Feb 13, 2006 at 04:21:10PM +0400, Vladimir wrote:
> Oliver Neukum([EMAIL PROTECTED]) recommended me to contact you 
> 
> Original message was:
> 
> I have 2.6.15.2 kernel.
> The connection was working fine, but then modem (it's my mobile phone, i'm 
> using cdc-acm) rebooted suddenly. There were diffirent results in these cases.
> 
> First time dmesg said: 
> 
> usb 3-1: USB disconnect, address 4
> drivers/usb/class/cdc-acm.c: acm_ctrl_irq - usb_submit_urb failed with result 
> -19
> 
> 
> But next time oops occured and dmesg said:
> 
> Unable to handle kernel NULL pointer dereference at virtual address 0000000c
>  printing eip:
> c0197af4
> *pde = 00000000
> Oops: 0000 [#1]
> Modules linked in: ppdev ipv6 ppp_async crc_ccitt ppp_generic slhc floppy udf 
> nls_koi8_r isofs zlib_inflate snd_rtctimer vmnet vmmon fglrx raw snd_es1938 
> snd_opl3_lib snd_hwdep snd_mpu401_uart snd_rawmidi snd_pcm_oss snd_mixer_oss 
> snd_intel8x0 snd_ac97_codec snd_ac97_bus snd_pcm snd_page_alloc parport_pc lp 
> parport usblp iptable_filter ip_tables af_packet w83627hf hwmon_vid eeprom 
> i2c_isa i2c_sis96x ide_cd cdrom loop reiser4 supermount snd_seq_oss 
> snd_seq_midi_event snd_seq snd_timer snd_seq_device snd soundcore evdev 
> joydev analog ns558 gameport sis_agp agpgart cdc_acm ehci_hcd ohci_hcd 
> usbcore container
> CPU:    0
> EIP:    0060:[<c0197af4>]    Tainted: P      VLI

Can you duplicate this without any closed source kernel modules loaded?

Odds are you can, as I've seen this oops report before :(

Can you attach the output of /proc/bus/usb/devices with your device
plugged into the system?

thanks,

greg k-h


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