[linux-dvb] Linux DVB on Mac PowerPC (Yellow Dog Linux - Freecom USB and DEC2000-t)

Johannes Stezenbach js at linuxtv.org
Sat Dec 10 21:31:19 CET 2005

On Sat, Dec 10, 2005 at 04:02:50PM +0000, Tim Hewett wrote:
> I managed to get my Yellow Dog kernel up from 2.6.10 to
> (clean download, not patched). The Freecom USB stick is now
> detected but I get the same problems as Michael Hanke recently
> reported (thread subject "dnt Euro Stick DVB-T -- FATAL: FE_GET_INFO
> failed:	22") where the device won't tune. The Freecom works fine
> with EyeTV under MacOS X, no tuning problems or issues associated
> with input signal saturation as reported by Mike Choy (thread subject
> "freecom dvb-t usb firmware coldstate") so there's nothing wrong with
> the stick or the aerial feed. But I get the same "recv bulk message
> failed: -110" as everyone else under Linux.

Maybe Patrick could comment, but I guess this -110 error isn't
a serious problem if I interpreted google results correctly.
Seems like your device works, Michael Hanke has a different

> I tried the DEC2000-t with the new kernel, same problem as before, here
> are the logs for that:
> DEC2000-t dmesg output:
> usb 4-1: new full speed USB device using ohci_hcd and address 2
> ttusb_dec: Firmware 1.05de
> Oops: kernel access of bad area, sig: 11 [#1]
> NIP: C0012168 LR: C01609EC SP: EFF2BC60 REGS: eff2bbb0 TRAP: 0300     
> Not tainted
> MSR: 00009032 EE: 1 PR: 0 FP: 0 ME: 1 IR/DR: 11
> DAR: 00000000, DSISR: 40000000
> TASK = c0608bd0[31] 'khubd' THREAD: eff2a000
> Last syscall: -1
> GPR00: C01EC704 EFF2BC60 C0608BD0 00000000 FFFFFFFF 0000001E 00000000  
> 000001A4
> GPR08: 00000000 00000000 C01ECDDC C01ECC20 00000000 00000000 C18D6418  
> C18B4890
> GPR16: 00000004 C18B48E2 C18A7E30 C03D0000 C0290000 C0380000 F22E0000  
> 00000001
> GPR24: 00000000 EFF2BD7C EDC1C860 00000000 0000001E 00000000 C0684120  
> C0684120
> NIP [c0012168] strlen+0x4/0x18
> LR [c01609ec] strlcpy+0x24/0x70
> Call trace:
> [c01ec704] _request_firmware+0xc8/0x37c
> [f22dbe6c] ttusb_dec_probe+0x2ac/0xc58 [ttusb_dec]

Can't see from the code why it would crash here (provided the calltrace
isn't bogus). You could add a printk() just before the
request_firmware() call in ttusb_dec_boot_dsp() to check if the
parameters are sane. Or just generally sprinkle some printk()
in there to find the reason for the crash.


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