Score:0

Ubuntu

DVB-T PCI cards not working since 23.04 upgrade

Kingsley

7/19/24, 5:53 AM

Before an upgrade to Ubuntu 23.04 I had two PCI DVB-T cards that worked perfectly.

After the upgrade, there is no /dev/dvb directory, no DVB modules are loaded, and dmesg does not even mention the presence of the cards.

The correct firmware files have been been copied into /lib/firmware/ - but even if they hadn't, I'd still expect to see the warning message in dmesg.

How do I go about diagnosing this?

# lspci -vv

04:00.0 Multimedia controller: Philips Semiconductors SAA7146 (rev 01)
    Subsystem: KNC One SAA7146
    Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
    Status: Cap- 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
    Latency: 32 (3750ns min, 9500ns max)
    Interrupt: pin A routed to IRQ 14
    Region 0: Memory at df201000 (32-bit, non-prefetchable) [size=512]

04:01.0 Multimedia controller: Philips Semiconductors SAA7146 (rev 01)
    Subsystem: Technotrend Systemtechnik GmbH Technotrend-Budget/Hauppauge WinTV-NOVA-T DVB card
    Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
    Status: Cap- 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
    Latency: 32 (3750ns min, 9500ns max)
    Interrupt: pin A routed to IRQ 15
    Region 0: Memory at df200000 (32-bit, non-prefetchable) [size=512]

# dmesg | grep -i dvb
(no output)

# lsmod | grep -i dvb
(no ouptut)

EDIT:

# lspci -nnk -d "1131:*"
04:00.0 Multimedia controller [0480]: Philips Semiconductors SAA7146 [1131:7146] (rev 01)
    Subsystem: KNC One SAA7146 [1894:003a]
04:01.0 Multimedia controller [0480]: Philips Semiconductors SAA7146 [1131:7146] (rev 01)
    Subsystem: Technotrend Systemtechnik GmbH Technotrend-Budget/Hauppauge WinTV-NOVA-T DVB card [13c2:1011]

# uname -a
Linux mediabox 6.2.0-24-generic #24-Ubuntu SMP PREEMPT_DYNAMIC Fri Jun 16 12:03:50 UTC 2023 x86_64 x86_64 x86_64 GNU/Linux

Everything I've read says I don't need to "fix" the udev rules. But how can I check they're correct? One used to make a new udev rule in the olden days.

1 + 6

dvb

dvb-t

23.04

Marco

7/19/24, 7:51 AM

I assume, without the used kernel version it will be hard to help. Please add the kernel and version to the question.

Marco

7/19/24, 8:01 AM

Please add the output of the command `lspci -nnk -d "1131:*"` to the question. I assume "1131" is the pci vendor id for the card. If not use the correct vendor id.

Kingsley

7/19/24, 9:25 PM

@Marco - I added that information. Is there anything else needed?

Marco

7/20/24, 3:13 PM

At least, we see now, that there is no kernel module loaded for the devices. There should be something like "Kernel driver in use:" in the output. Do you know which kernel module is needed for the card?

Kingsley

7/21/24, 4:06 AM

@Marco - From memory `tt_budget` (?) This pulls in `dvb_code`, etc. I can't remember what the non-Hauppauge card uses.

Marco

7/21/24, 9:41 AM

I guess its "budget.ko". This module is not found in kernel 6.2.

Score:1

Ubuntu

Marco

7/21/24, 9:53 AM

I googled it for you ...

In 2022 the driver for Saa7146 was moved to "deprecated" in Linux Kernel.

https://lore.kernel.org/linux-media/[email protected]/

The remaining patches move other non-vb2 drivers to this deprecated directory: cpia2, meye, zr364xx, tm6000, fsl-viu, some davinci drivers, and saa7146. Finally the deprecated staging driver av7110 is moved to deprecated/saa7146.

Note that the ttpci (using just the DVB part of saa7146) was deprecated as well. It should be possible to extract it from the saa7146 driver as a DVB-only driver, but I am not certain if that is worth the effort.

It's really very old hardware... (20+ years).

Last Kernel version containing Saa7146 driver was 5.19.

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