Exchange outdated dvb-t2 firmware with read-only filesystem

TobiasWe · June 1, 2021 at 4:28 PM

Hello Everybody,

from this forum I know that I have to update my WinTV Solo HD firmware to watch DVB-T2 correctly (the channels of one tvheadend mux are disturbed):
DVB-T2 ZDF Mux in Leipzig/Germany at 482MHz not working - Tvheadend

When I try to exchange the file dvb-demod-si2168-b40-01.fw on my Raspberry 4, I cannot because it's a read-only filesystem. I tried to remount root and I tried to mount the sd card on my Laptop. Neither helped.

So how can I update the firmware file on my Raspberry Pi 4?

kind regards,

Tobias

**lrusak** · June 1, 2021 at 4:37 PM Official Post

use /storage/.config/firmware/

You may have to create the folder if it doesn't exist

TobiasWe · June 1, 2021 at 7:29 PM

OK, but I also have to delete the old version in the order

/usr/lib/kernel-overlays/base/lib/firmware/

How can I do that?

**lrusak** · June 1, 2021 at 10:02 PM Official Post

Quote from TobiasWe

OK, but I also have to delete the old version in the order
/usr/lib/kernel-overlays/base/lib/firmware/
How can I do that?

you can't

IIRC the firmware in /storage/.config/firmware will be preferred.

TobiasWe · June 2, 2021 at 4:17 PM

I did so, but that didn't help to solve the dvb-t problem )-:

**CvH** · June 3, 2021 at 10:43 AM Official Post

https://wiki.libreelec.tv/how-to/add-firmware

then check dmesg if the version of the fw file really changed (firmware name loaded or similar should appear somewhere at dmesg output)

TobiasWe · June 4, 2021 at 2:56 PM

There is a lot output with dmsg. But the last ca 50 lines repeat this:

em28xx 1-1.4.1:1.0: write to i2c device at 0xc8 failed with unknown error (status=128)

I know from

[SOLVED/WORKAROUND] Hauppauge SoloHD not working/new product ID - Tvheadend

that em28xx is the corresponding kernel module for the firmware and the dvb-t2 stick.

Is there a conflict between two firmware files?

[7.125042] em28xx: Registered (Em28xx Input Extension) extension

[ 7.391689] si2168 8-0064: firmware version: B 4.0.11

[ 7.397775] si2157 9-0060: found a 'Silicon Labs Si2157-A30'

[ 7.447904] si2157 9-0060: firmware version: 3.0.5

Is it important that I use a USB hub with its own power supply?

TobiasWe · June 4, 2021 at 4:52 PM

I put the USB hub away and connected the DVB-T2 stick to the raspberry directly. Now none of the channels work correctly. Before only the ZDF Mux didn't work.

Here is the dmesg output for the direct connection.

**CvH** · June 5, 2021 at 10:08 AM Official Post

did you tired

modprobe em28xx card=94
echo "2040 8268" > /sys/bus/usb/drivers/em28xx/new_id

if it works afterwards ? (reboot resets this settings)

TobiasWe · June 5, 2021 at 7:52 PM

I tried

Quote from CvH

modprobe em28xx card=94
echo "2040 8268" > /sys/bus/usb/drivers/em28xx/new_id

With updated and without updated firmware. It didn't help.

TobiasWe · June 5, 2021 at 8:43 PM

I think now the DVB-T2 stick is defect. After all it doesn't funk on my laptop, which did at the very beginning!

**CvH** · June 6, 2021 at 10:56 AM Official Post

did you tried it at windows? if it doesn't work there then its likely ready for the bin

TobiasWe · June 6, 2021 at 5:19 PM

No, I don't have any windows computer. But I feel the stick got more and more damaged. So after 482MHz, also the 498MHz didn't work. On the very begining I could watch everything on the laptop. Now it doesn't work on the laptop.

So it got damaged in slow motion.

I will try to buy the same Stick again. Then I will see that all drivers and the new stick will work, I think!

Tobias