[linux-dvb] dtt200u crashing with smp

Markus Rechberger mrechberger at gmail.com
Wed May 23 18:55:02 CEST 2007


Hi,

On 5/23/07, ben handley <ben at steelgarden.com> wrote:
> I used the drivers from kernel 2.6.20. Are they significantly out of
> date? I'll try with the linuxtv.org drivers and see if it's better.


yes they're significantly out of date, I'm not sure what the status of
your device is better try to upgrade to the latest available
sourcecode.

>
> I've heard of general problems with smp and usb2 -- could my problem
> just be a case of that? I didn't manage to find out whether that
> problem has been fully resolved or not.

it might be smp related, I'm not sure what the disconnection of your
device caused, first try to upgrade your drivers afterwards let's see.

Markus

>
> Thanks,
> Ben
>
> On 15/05/07, Markus Rechberger <mrechberger at gmail.com> wrote:
> > Hi,
> >
> > do you use the drivers which are included in the kernel or did you use
> > the latest sources from linuxtv.org?
> >
> > Markus
> >
> > On 5/12/07, ben handley <ben at steelgarden.com> wrote:
> > > Hi,
> > > I have a freecom usb dvt-t device, which works fine with a non-smp
> > > kernel (using the dvb-usb-dtt200u driver). But with an smp kernel, on
> > > my dual core athlon cpu (i386 mode, haven't tried a 64 bit install
> > > yet), I get frequent problems. Usually I just lose all reception, and
> > > can only get it back by rebooting. Sometimes stranger things happen,
> > > like the keyboard stopping working. The problems only ever occur while
> > > using the device.  Is the dvb-usb-dtt200u driver known to not be smp
> > > safe?
> > >
> > > Here's a sample of what tends to get dumped to the console around the
> > > time things go wrong. Anythink else I can provide to help diagnose?
> > >
> > > Thanks a lot,
> > > Ben
> > >
> > > dvb-usb: WideView WT-220U PenType Receiver (Typhoon/Freecom)
> > > successfully deinitialized and disconnected.
> > > BUG: unable to handle kernel paging request at virtual address f8a580c0
> > >  printing eip:
> > > f8a580c0
> > > *pde = 02912067
> > > *pte = 00000000
> > > Oops: 0000 [#1]
> > > SMP
> > > Modules linked in: usbhid dvb_usb dvb_core firmware_class dvb_pll
> > > i2c_core radeon drm snd_pcm_oss snd_mixer_oss snd_emu10k1 snd_rawmidi
> > > snd_ac97_codec ac97_bus snd_pcm snd_seq_device snd_timer
> > > snd_page_alloc snd_util_mem snd_hwdep usblp 8139too amd64_agp agpgart
> > > snd bitrev crc32
> > > CPU:    0
> > > EIP:    0060:[<f8a580c0>]    Not tainted VLI
> > > EFLAGS: 00010246   (2.6.20.4.noold #1)
> > > EIP is at 0xf8a580c0
> > > eax: ea6ae000   ebx: ea6ae000   ecx: c294df48   edx: c294df4c
> > > esi: c28eb380   edi: ea6af00c   ebp: 00000292   esp: c294df40
> > > ds: 007b   es: 007b   ss: 0068
> > > Process events/0 (pid: 6, ti=c294c000 task=c292ea70 task.ti=c294c000)
> > > Stack: f8a52738 c28125a0 00000000 c2813160 ea6af010 c012fb2c 00000000
> > > c28eb394
> > >        c294df9c c28125e8 c28eb38c c28eb3a0 f8a52710 c28eb380 c28eb38c
> > > c28eb394
> > >        c294df9c c012fd9f 00000001 00000000 00000000 00010000 00000000
> > > 00000000
> > > Call Trace:
> > >  [<f8a52738>] dvb_usb_read_remote_control+0x28/0xe0 [dvb_usb]
> > >  [<c012fb2c>] run_workqueue+0x7c/0x150
> > >  [<f8a52710>] dvb_usb_read_remote_control+0x0/0xe0 [dvb_usb]
> > >  [<c012fd9f>] worker_thread+0xff/0x160
> > >  [<c011b7c0>] default_wake_function+0x0/0x10
> > >  [<c012fca0>] worker_thread+0x0/0x160
> > >  [<c01331bc>] kthread+0xec/0xf0
> > >  [<c01330d0>] kthread+0x0/0xf0
> > >  [<c0103b7f>] kernel_thread_helper+0x7/0x18
> > >  =======================
> > > Code:  Bad EIP value.
> > > EIP: [<f8a580c0>] 0xf8a580c0 SS:ESP 0068:c294df40
> > >
> > > _______________________________________________
> > > linux-dvb mailing list
> > > linux-dvb at linuxtv.org
> > > http://www.linuxtv.org/cgi-bin/mailman/listinfo/linux-dvb
> > >
> >
> >
> > --
> > Markus Rechberger
> >
>


-- 
Markus Rechberger



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