Tvheadend

Patric Gustavsson wrote:

Dear Sir/Madam,

Since a couple of days ago, my RTL2838 DVB-T stick stopped working. (after upgrading tvheadend)

It was still visible as a device in tvheadend, but could not get any service channels (scans stated FAIL)

Tested my antenna directly in my tv instead, and the antenna still works, and i can view channels.

I guess its possible that my DVB-T stick has developt a fault, but want to make sure before i fork out money for a new one.

In my attempts for remedy this, i compiled and installed the media_build linux tv drivers http://git.linuxtv.org/media_build.git (i cannot actually see a realtek module listed)

This made things even worse, and i can now no longer see my usb stick in tvheadend at all..

Some details about my stick etc :

[12:09:54] mrpg@mediapc:[/opt/media_build]: lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 15.04
Release: 15.04
Codename: vivid

sudo lsusb -s 2:2 -v

Bus 002 Device 002: ID 0bda:2838 Realtek Semiconductor Corp. RTL2838 DVB-T
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 2.00
bDeviceClass 0 (Defined at Interface level)
bDeviceSubClass 0
bDeviceProtocol 0
bMaxPacketSize0 64
idVendor 0x0bda Realtek Semiconductor Corp.
idProduct 0x2838 RTL2838 DVB-T
bcdDevice 1.00
iManufacturer 1 Realtek
iProduct 2 RTL2838UHIDIR
iSerial 0
bNumConfigurations 1
Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 34
bNumInterfaces 2
bConfigurationValue 1
iConfiguration 4 USB2.0-Bulk&Iso
bmAttributes 0x80
(Bus Powered)
MaxPower 500mA
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 0
bNumEndpoints 1
bInterfaceClass 255 Vendor Specific Class
bInterfaceSubClass 255 Vendor Specific Subclass
bInterfaceProtocol 255 Vendor Specific Protocol
iInterface 5 Bulk-In, Interface
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x81 EP 1 IN
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0200 1x 512 bytes
bInterval 0
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 1
bAlternateSetting 0
bNumEndpoints 0
bInterfaceClass 255 Vendor Specific Class
bInterfaceSubClass 255 Vendor Specific Subclass
bInterfaceProtocol 255 Vendor Specific Protocol
iInterface 5 Bulk-In, Interface
Device Qualifier (for other device speed):
bLength 10
bDescriptorType 6
bcdUSB 2.00
bDeviceClass 0 (Defined at Interface level)
bDeviceSubClass 0
bDeviceProtocol 0
bMaxPacketSize0 64
bNumConfigurations 2
Device Status: 0x0000
(Bus Powered)

HTS Tvheadend 4.1-433~gd0e7876

If anyone can help me, that would be much appriciated!
(I have another DVB card in the pc as well, this one still works fine)

Best Regards
Patric

Check dmesg to see if the device gets found and registered. dmesg usually blurts out something like

DVB: registering adapter 0 frontend 0 (Realtek RTL2832 (DVB-T))
usbcore: registered new interface driver dvb_usb_rtl28xxu

If you don't see either of these lines (or anything similar) but it appears in lsusb then you have a broken media build.

I had some issues with the latest media build myself, most of my tuners weren't detected at all & had to revert to the older modules, luckily I had a backup.

Hi Mark,

Thanks for you reply.

Its probably a b0rked media_build.

I tried updating it today, but now it wont even build anymore.

cannot figure out how i can get an older version using git, have tried :

sudo git log
to find the hasch of the commit i want, and then :
sudo git checkout 7d84743d0e17274bbe28249e1ec7aad95c1efa39

but still fails to build.

if i remove the usb device, i only get this in dmesg :

[17643.350094] usb 2-1: USB disconnect, device number 2
[17657.780037] usb 2-3: new high-speed USB device number 4 using ehci-pci
[17657.922329] usb 2-3: New USB device found, idVendor=0bda, idProduct=2838
[17657.922336] usb 2-3: New USB device strings: Mfr=1, Product=2, SerialNumber=0
[17657.922340] usb 2-3: Product: RTL2838UHIDIR
[17657.922343] usb 2-3: Manufacturer: Realtek

So i'm stuck

will try and find a driver elsewhere, but they are old.

Br
Patric

Hi Again,

still got issues with this one.

yesterday, i removed the V4L drivers that i had managed to install.

then my DVB-S2 card dies as well , tried re-installing the standard ubuntu kernel, but did not help, i had no cards registerred in tvheadend.

Out of desperation, i upgraded the kernel to 4.1.2 , then my DVB-S2 card started working again, but the DVB-T card still would not work.

Tried compiling the V4L drivers again, and this time it worked fine.

and sudo modprobe dvb-usb-rtl28xxu also does not complain, but no card appears under tvheadend.

i can see this in dmesg :

[ 4.009458] dvb_core: module verification failed: signature and/or required key missing - tainting kernel
[ 4.022408] saa7146: register extension 'budget dvb'
[ 4.149405] usb 2-3: dvb_usb_v2: found a 'Realtek RTL2832U reference design' in warm state
[ 4.385520] usb 2-3: dvb_usb_v2: will pass the complete MPEG2 transport stream to the software demuxer
[ 4.388603] dvb_usb_rtl28xxu 2-3:1.0: unknown tuner NONE
[ 4.399729] usbcore: registered new interface driver dvb_usb_rtl28xxu
[ 4.529843] budget dvb 0000:07:04.0: DVB: registering adapter 0 frontend 0 (STV090x Multistandard)...
[ 11.416162] budget dvb 0000:07:04.0: DVB: adapter 0 frontend 0 frequency 0 out of range (950000..2150000)

i.e it registers my DVB-S2 , but still not my DVB-T card

any help with this is very appriciated!

Br
Patric

Patric Gustavsson wrote:

Hi Again,

still got issues with this one.

yesterday, i removed the V4L drivers that i had managed to install.

then my DVB-S2 card dies as well , tried re-installing the standard ubuntu kernel, but did not help, i had no cards registerred in tvheadend.

Out of desperation, i upgraded the kernel to 4.1.2 , then my DVB-S2 card started working again, but the DVB-T card still would not work.

Tried compiling the V4L drivers again, and this time it worked fine.

and sudo modprobe dvb-usb-rtl28xxu also does not complain, but no card appears under tvheadend.

i can see this in dmesg :

[ 4.009458] dvb_core: module verification failed: signature and/or required key missing - tainting kernel
[ 4.022408] saa7146: register extension 'budget dvb'
[ 4.149405] usb 2-3: dvb_usb_v2: found a 'Realtek RTL2832U reference design' in warm state
[ 4.385520] usb 2-3: dvb_usb_v2: will pass the complete MPEG2 transport stream to the software demuxer
[ 4.388603] dvb_usb_rtl28xxu 2-3:1.0: unknown tuner NONE
[ 4.399729] usbcore: registered new interface driver dvb_usb_rtl28xxu
[ 4.529843] budget dvb 0000:07:04.0: DVB: registering adapter 0 frontend 0 (STV090x Multistandard)...
[ 11.416162] budget dvb 0000:07:04.0: DVB: adapter 0 frontend 0 frequency 0 out of range (950000..2150000)

i.e it registers my DVB-S2 , but still not my DVB-T card

any help with this is very appriciated!

Br
Patric

The bit in bold looks to be the issue, did a google couldn't come up with anything matching newer kernels (loads for 3.x though).

FYI.

I got the card to work in this pc in the end (i.e it registerred as a device in /dev/dvb/ , and i could see it in tvheadend, but it still fails to get a signal.

tested it on another pc, and same problem here, the card is found, but cannot get any signals.

also get messages in dmesg that the usb card was successfully removed from the system from time to time, even though its still very much inserted into the usb port.

So the dongle is broken

Buying a new one

thanks for all the help & suggestions!

Br
mrpg