Sundtek Support Forum

Any error you get in DMESG should be handled as Raspberry PI Bug and filed in their corresponding bugtracking system or even the Linux Kernel Mailinglist.

It took me a while to get the stick running again on the RPi. Raspbian for some kind of reason did not work anymore with the stick and tvheadend. With ArchLinux I get the following error in dmesg:

usb 1-1.3.1: usbfs: USBDEVFS_CONTROL failed cmd mediasrv rqt 192 rq 0 len 5 ret -845276059

Unable to handle kernel NULL pointer dereference at virtual address 00000030
pgd = cda2c000
[00000030] *pgd=0db34831, *pte=00000000, *ppte=00000000
Internal error: Oops: 17 [#1] PREEMPT
Modules linked in: videodev media ipv6 uinput
CPU: 0    Not tainted  (3.1.9-20-ARCH+ #1)
pc : [<c033d0cc>]    lr : [<c033dae4>]    psr: 60000093
sp : cdae3d30  ip : cdae3d58  fp : cdae3d54
r10: 449db908  r9 : cd9de800  r8 : cd8e68c0
r7 : cdae2000  r6 : cd9de834  r5 : cd8e68c0  r4 : cd9de834
r3 : 00000000  r2 : ffffff94  r1 : cd9de834  r0 : cd8e68c0
Flags: nZCv  IRQs off  FIQs on  Mode SVC_32  ISA ARM  Segment user
Control: 00c5387d  Table: 0da2c008  DAC: 00000015
Process mediasrv (pid: 990, stack limit = 0xcdae2268)
Stack: (0xcdae3d30 to 0xcdae4000)
3d20:                                     cd9d1ae4 cd9d1af4 cd9de834 cdae2000
3d40: cd8e68c0 449db908 cdae3d7c cdae3d58 c033dae4 c033d0c0 00000000 cd9d1ae4
3d60: cd9de800 00000000 cd9de800 00000000 cdae3d9c cdae3d80 c034016c c033d9d4
3d80: cd9d1ae4 00000084 00000003 cd9e34ac cdae3dc4 cdae3da0 c03401e8 c0340120
3da0: 00000003 cd9d1980 c056d420 cd9d1960 cd9de800 cd9d6560 cdae3de4 cdae3dc8
3dc0: c0341b4c c03401b0 cd9d1980 c056d420 00000001 80045510 cdae3dfc cdae3de8
3de0: c02fbe98 c0341a90 cd9d19b4 cd9d1980 cdae3e14 cdae3e00 c02fbf0c c02fbe44
3e00: cd9d1980 cd9d6560 cdae3e3c cdae3e18 c0341c08 c02fbef4 c0010270 c0011630
3e20: 00000000 00000000 cd9d6560 cd9d1960 cdae3e5c cdae3e40 c03454e4 c0341b88
3e40: 00000000 cd9de89c 00000000 00000000 cdae3efc cdae3e60 c0346e34 c034549c
3e60: cdae3e84 cdae3e70 c0028750 c001b730 c0060358 c0567dac cdae3ea4 cdae3e88
3e80: c000eb20 c00286e4 c00b4390 c00b3e18 20000013 cda603a8 cdae3eb4 cdae3ea8
3ea0: c0008190 c000eaf0 cdae3f7c cdae3eb8 c000de34 c000818c 00005452 00000013
3ec0: 0000550b 41e6b738 0000550b cdba6b60 41e6b738 80045510 cdba6b60 449db908
3ee0: cdba6b60 c000e424 cda603a8 449db908 cdae3f7c cdae3f00 c00b3e6c c0346370
3f00: 00000001 cdae2000 cdae3f3c cdae3f18 c0010270 c0011630 00000000 c001b788
3f20: cdae3f7c cdae3f58 c001b788 c00a4af4 cdae3f54 cdae3f40 c001b788 c0010240
3f40: 00000002 cdba6b60 cdae3f7c cdae3f58 c00a4af4 80045510 00000013 449db908
3f60: cdba6b60 c000e424 cdae2000 00000000 cdae3fa4 cdae3f80 c00b4390 c00b3df4
3f80: 002be568 00000001 80045510 449db908 00000224 00000036 00000000 cdae3fa8
3fa0: c000e2a0 c00b4360 80045510 449db908 00000013 80045510 449db908 401b9684
3fc0: 80045510 449db908 00000224 00000036 449db908 00000000 80045510 449db924
3fe0: 449db8d0 449db8c0 401b8024 40293920 60000010 00000013 00000000 00000000
Backtrace:
Function entered at [<c033d0b4>] from [<c033dae4>]
Function entered at [<c033d9c8>] from [<c034016c>]
 r8:00000000 r7:cd9de800 r6:00000000 r5:cd9de800 r4:cd9d1ae4
r3:00000000
Function entered at [<c0340114>] from [<c03401e8>]
 r6:cd9e34ac r5:00000003 r4:00000084 r3:cd9d1ae4
Function entered at [<c03401a4>] from [<c0341b4c>]
 r8:cd9d6560 r7:cd9de800 r6:cd9d1960 r5:c056d420 r4:cd9d1980
r3:00000003
Function entered at [<c0341a84>] from [<c02fbe98>]
 r7:80045510 r6:00000001 r5:c056d420 r4:cd9d1980
Function entered at [<c02fbe38>] from [<c02fbf0c>]
 r5:cd9d1980 r4:cd9d19b4
Function entered at [<c02fbee8>] from [<c0341c08>]
 r5:cd9d6560 r4:cd9d1980
Function entered at [<c0341b7c>] from [<c03454e4>]
 r6:cd9d1960 r5:cd9d6560 r4:00000000
Function entered at [<c0345490>] from [<c0346e34>]
 r6:00000000 r5:00000000 r4:cd9de89c r3:00000000
Function entered at [<c0346364>] from [<c00b3e6c>]
Function entered at [<c00b3de8>] from [<c00b4390>]
Function entered at [<c00b4354>] from [<c000e2a0>]
 r7:00000036 r6:00000224 r5:449db908 r4:80045510
Code: e24cb004 e5913028 e1a04001 e1a05000 (e5933030)
---[ end trace 9d92c50ed7b455fc ]---

Considering it's a hardware problem, the distro should not matter too much right?

Almost forgot, Sundtek, thanks for helping us solve these problems. Most could learn a lot from your customer support. I, for one, really appreciate it!

Update:
It crashes much less with:

/opt/bin/mediaclient --cat /dev/dvb/adapter0/dvr0 | /opt/bin/mediaclient --pipecount 1000

Also, watching SD video is possible on some channels, but HD gives only transport errors. Although, I guess when I would map the channels in tvheadend, it would crash again after a while.

Futhermore, I've checked the BER counts and they are 0

Thanks guys for finding the culprit. Hope I'll have some time to test that configuration tonight.

These were the exact problems I was having. I just gave up in the end.

Did you switch the device to bulk mode?

Zitat

/opt/bin/mediaclient --dtvtransfermode=bulk

Zitat

Can the driver be made a bit more fault tolerant?

not in that case, when the device is gone it's gone from the system the driver won't have access to the device anymore.

So far we tested HAMA USB Hubs and they worked fine for our purpose

you might try to contact us via skype "sundtek" in order to doublecheck that everything is set up to what we would call best setup.

Do you guys have the Raspberry Pi working with tvheadend and the stick? If so, I might very well buy the hub

Hi Mrkb!

I've been trying the exact same thing and had the same problems with accessing frontend0. I have the same router and OpenWRT installed, but gave up in the end because I couldn't get it going. Another problem I faced was that Tvheadend crashed with presumably a memory issue (segmentation error?).
You're in the Netherlands, right (perhaps Ziggo as well)? I wouldn't mind giving it another shot though, because I would really love to have the router work solo as a kind of decoder.