[linux-dvb] Multiple DVB USB devices and lockups

[Tim Davies]

Hi,

I noticed in November there was a problem running multiple Twinhan DTV 
MagicBox II devices, which causes the kernel to lock up.  As far as I 
could tell, the issue was abandoned - with a copy of the kernel oops 
being needed to continue...

Well, I also have multiple vp7045 based tuners (the DNTV version) and 
have the same problem.  I have an excerpt of the kernel oops text below.

Basically the problem seems to occur if any tuner apart from the first 
one is opened, and there is normally a delay (15-20sec?) before the 
crash.  I am using the CVS driver from the 16/1/06 (the most recent).

Thanks,

Tim.


Jan 16 10:39:20 mediabox <ffffffff88607861>{:dvb_usb:dvb_usb_fe_wakeup+65} <ffffffff88607861>{:dvb_usb:dvb_usb_fe_wakeup+65}

... <repeated ~100 times>

Jan 16 10:39:20 mediabox <ffffffff88607861>{:dvb_usb:dvb_usb_fe_wakeup+65} <ffffffff88607861>{:dvb_usb:dvb_usb_fe_wakeup+65}
Jan 16 10:39:20 mediabox <ffffffff88607861>{:dvb_usb:dvb_usb_fe_wakeup+65} <ffffffff8012cde4>{deactivate_task+20}
Jan 16 10:39:20 mediabox <ffffffff885f7f5b>{:dvb_core:dvb_frontend_thread+219}
Jan 16 10:39:20 mediabox <ffffffff80130031>{copy_process+4241} <ffffffff8010f31e>{child_rip+8}
Jan 16 10:39:20 mediabox <ffffffff885f7e80>{:dvb_core:dvb_frontend_thread+0}
Jan 16 10:39:20 mediabox <ffffffff8010f316>{child_rip+0}
Jan 16 10:39:20 mediabox scheduling while atomic: kdvb-fe-1/0xffff8100/14284
Jan 16 10:39:20 mediabox
Jan 16 10:39:20 mediabox Call Trace:<ffffffff803ca99a>{schedule+122} <ffffffff8032dbd0>{timeout_kill+0}
Jan 16 10:39:20 mediabox <ffffffff803cb7b4>{schedule_timeout+148} <ffffffff80139670>{process_timeout+0}
Jan 16 10:39:20 mediabox <ffffffff80139a4a>{msleep+42} <ffffffff8860c11c>{:dvb_usb_vp7045:vp7045_usb_op+284}
Jan 16 10:39:20 mediabox <ffffffff8860c3fa>{:dvb_usb_vp7045:.text.lock.vp7045+5}
Jan 16 10:39:20 mediabox <ffffffff8860c24a>{:dvb_usb_vp7045:vp7045_power_ctrl+42}
Jan 16 10:39:20 mediabox <ffffffff8860784c>{:dvb_usb:dvb_usb_fe_wakeup+44} <ffffffff88607861>{:dvb_usb:dvb_usb_fe_wakeup+65}
Jan 16 10:39:20 mediabox <ffffffff88607861>{:dvb_usb:dvb_usb_fe_wakeup+65} <ffffffff88607861>{:dvb_usb:dvb_usb_fe_wakeup+65}

...

Jan 16 10:39:20 mediabox <ffffffff88607861>{:dvb_usb:dvb_usb_fe_wakeup+65} <ffffffff88607861>{:dvb_usb:dvb_usb_fe_wakeup+65}
Jan 16 10:39:20 mediabox <ffffffff88607861>{:dvb_usb:dvb_usb_fe_wakeup+65} <ffffffff8012cde4>{deactivate_task+20}
Jan 16 10:39:20 mediabox <ffffffff885f7f5b>{:dvb_core:dvb_frontend_thread+219}
Jan 16 10:39:20 mediabox <ffffffff80130031>{copy_process+4241} <ffffffff8010f31e>{child_rip+8}
Jan 16 10:39:20 mediabox <ffffffff885f7e80>{:dvb_core:dvb_frontend_thread+0}
Jan 16 10:39:20 mediabox <ffffffff8010f316>{child_rip+0}
Jan 16 10:39:20 mediabox scheduling while atomic: kdvb-fe-1/0xffff8100/14284
Jan 16 10:39:20 mediabox
Jan 16 10:39:20 mediabox Call Trace:<ffffffff803ca99a>{schedule+122} <ffffffff803cb7b4>{schedule_timeout+148}
Jan 16 10:39:20 mediabox <ffffffff80139670>{process_timeout+0} <ffffffff80139a4a>{msleep+42}
Jan 16 10:39:20 mediabox <ffffffff8860c11c>{:dvb_usb_vp7045:vp7045_usb_op+284}
Jan 16 10:39:20 mediabox <ffffffff8860c3fa>{:dvb_usb_vp7045:.text.lock.vp7045+5}
Jan 16 10:39:20 mediabox <ffffffff8860c24a>{:dvb_usb_vp7045:vp7045_power_ctrl+42}
Jan 16 10:39:20 mediabox 861>{:dvb_usb:dvb_usb_fe_wakeup+65} <ffffffff88607861>{:dvb_usb:dvb_usb_fe_wakeup+65}
Jan 16 10:39:20 mediabox <ffffffff88607861>{:dvb_usb:dvb_usb_fe_wakeup+65} <ffffffff88607861>{:dvb_usb:dvb_usb_fe_wakeup+65}

...