[linux-dvb] Re: Kernel oops with new DiB7000M driver (was: DiB7000M-driver released (Nova-T Stick, AverMedia and others))

Nicolas George nicolas.george at ens.fr
Wed Oct 25 13:04:19 CEST 2006


Le quartidi 4 brumaire, an CCXV, Patrick Boettcher a écrit :
> > [ 1880.948479] APIC error on CPU0: 40(40)
> > [ 1891.087908] hub 1-0:1.0: port 6 disabled by hub (EMI?), re-enabling...
> Here the problem starts. The USB-Port is dying.

It seems so. Yet, it is something caused by the DVB device or driver, since
it occurs specifically when I try to change something. I just tried to just
watch TV, and it worked without oopsing; in particular, it survived several
of these annoying but seemingly harmless "APIC error"s that I have since the
beginning. It oopsed when I tried to change the channel (on the fourth
time).

On the other hand, I just tried to insert an USB hub in the chain, and now
mplayer complains that:

dvb_streaming_read, attempt N. 6 failed with errno 0 when reading 1948 bytes

and tzap shows a status of 1b instead of 1f. The status stays 1b even if I
unplug the stick and re-plug it directly on the computer. It all seems quite
mysterious.

> > [ 1891.087915] usb 1-6: USB disconnect, address 2
> And the device disconnects. I assume while you are watching TV. That's why 
> the following Oops. The dvb-core is not hotpluggable so it cannot handle 
> suddenly disappearing devices.
> 
> > [ 1896.963791] Unable to handle kernel NULL pointer dereference at 0000000000000021 RIP: 
> What is your USB controller?

It seems to be an ATI SB400.

Thanks for your efforts.

-- 
  Nicolas George

00:13.0 USB Controller: ATI Technologies Inc IXP SB400 USB Host Controller (prog-if 10 [OHCI])
	Subsystem: Acer Incorporated [ALI] Unknown device 007e
	Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV+ VGASnoop- ParErr- Stepping- SERR- FastB2B-
	Status: Cap+ 66MHz+ UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR-
	Latency: 64, Cache Line Size: 64 bytes
	Interrupt: pin A routed to IRQ 233
	Region 0: Memory at c0000000 (32-bit, non-prefetchable) [size=4K]
	Capabilities: <access denied>

00:13.1 USB Controller: ATI Technologies Inc IXP SB400 USB Host Controller (prog-if 10 [OHCI])
	Subsystem: Acer Incorporated [ALI] Unknown device 007e
	Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV+ VGASnoop- ParErr- Stepping- SERR- FastB2B-
	Status: Cap+ 66MHz+ UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR-
	Latency: 64, Cache Line Size: 64 bytes
	Interrupt: pin A routed to IRQ 233
	Region 0: Memory at c0001000 (32-bit, non-prefetchable) [size=4K]
	Capabilities: <access denied>

00:13.2 USB Controller: ATI Technologies Inc IXP SB400 USB2 Host Controller (prog-if 20 [EHCI])
	Subsystem: Acer Incorporated [ALI] Unknown device 007e
	Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV+ VGASnoop- ParErr- Stepping- SERR- FastB2B-
	Status: Cap+ 66MHz+ UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR-
	Latency: 64, Cache Line Size: 64 bytes
	Interrupt: pin A routed to IRQ 233
	Region 0: Memory at c0002000 (32-bit, non-prefetchable) [size=4K]
	Capabilities: <access denied>
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