Reinstall 4.9 kernel version on RPI2?

Help and Support Raspberry Pi
1

Hello,

since OSMC upgraded to kernel version 4.14 I experienced problems with my dvbsky_s960 usb sat receivers.

I found out that others do have the exact same problems as I do and it looks like only downgrading to 4.9 fixes them.

So how do I downgrade to 4.9? I have removed the old package and if I try to reinstall it I get the following error:

osmc@tvheadend:~$ sudo apt install --reinstall rbp2-image-4.9.29-15-osmc
Reading package lists… Done
Building dependency tree
Reading state information… Done
Package rbp2-image-4.9.29-15-osmc is not available, but is referred to by another package.
This may mean that the package is missing, has been obsoleted, or
is only available from another source

E: Package ‘rbp2-image-4.9.29-15-osmc’ has no installation candidate

brgds, Michael

2

What problem do you experience with the receiver?
4.9 is EOL

3

Before the latest kernel update they only worked for a short time/as long as they were being used. As they were unused for some minutes they were not working anymore. I found other reporting the same problem.
Since the latest kernel update (4.14.34-2-osmc) they stopped working completely.

4

Do you have a link to people experiencing the same problem and a debug log?
Without reports I can’t fix it, and downgrading isn’t a proper solution. You will need to upgrade eventually.

5

So everyone reports problems between 4.9 and 4.10, problems and description varies. Here some examples:
https://www.spinics.net/lists/linux-media/msg132365.html
https://forum.libreelec.tv/thread/12452-problems-with-dvbsky-technotrend-usb-dvb-s2-tuners-since-le8/
https://gitlab.labs.nic.cz/turris/openwrt/issues/143

I am on the newest version of OSMC (I am not a Linux newbie, using Linux since 1992). I am completely dependend on OSMC and those receivers (my wife cannot watch TV anymore). So for a workaround I need kernel 4.9.

Can you please give me a hint where to find it precompiled as a package? I really do not want to go into the hassle to compile it myself.

6

By the way, there is no debug log, before 4.14 and after 4.9 they stopped working after a few minutes of idling without ANY log anywhere, since 4.14 they do not even attach:
dvbsky_s960_attach fail

brgds

7

Your fastest road to success is reinstall an older image

8

Thank you, but that really is a lot of work (configuring tvheadend, oscam, etc.). With the old kernel image it is a matter of a few minutes to get it up and running again.

9

IIRC, when the upgrade from 4.9 happened, we were already on Krypton and TVH 4.2. So you should get away with backing up your home dir, re-imaging with the ?January release and copying things back.

But I’ve no idea what is needed for oscam.

10

Hi again,

so I reinstalled from scratch with the January image. It’s the last one with kernel 4.9 but already on TVH 4.2 and Kodi 7.6.

Then I told apt to hold the kernel package: apt-mark hold rbp2-kernel-osmc

After that I updated all other packages. Result: now my receivers work again perfectly. I will file a bug upstream and will warn people on Amazon (where I bought those receivers) about this.