mihu

Thanks for the tip, but I'm afraid this would not help if this is really the ground loop problem I suspect. Besides I wouldn't like to complicate my setup further, that's why I asked about the tuner, which could act like an audio router/converter. The question is whether the hardware is capable of delivering the hdmi audio return channel and if so whether this is exposed as a Linux system device.

The reality looks worse than the above numbers might suggest. Only 114M of flash is dedicated to root partition, then the file-system takes quite a lot of space for its internal use. As a result df reports  for ubi0:rootfs 97.5M size with only 3.7M free space. This is for a basically configured system (manually scanned HotBird+Astra) with just two necessary additional packages for cam support and fan control utility.

It seems I wasn't clear enough. I do upgrades that way. The problem is that the last online update I've made (with 21 packages to go) actually broke my system because of insuffficient space. My conclusion is that the online update method is no longer safe. I'm using additional packages, but my system is quite minimal, so other users can be in the same situation.

I'm sure the base system can still be shrinked - for example hbbtv plugin could be removed. (I would vote for the fancontrol2 instead, which I find important for the health of electronics.)

The good point is that the AutoBackup worked reliably, although one needs to reinstall additional packages manually, but it's a marginal issue.

I've used incremental updates because of convenience, but will have to changed that. I haven't noticed that earlier but the system actually broke and I had to reinstall everything from scratches. I will try the AutoBackup method next time.

I understand the limitations but hope that at least security updates will be available longer.

Last but not least thanks and respect for supporting older device. They may seem a bit obsolete but do their job.

I've faced the same problem. I've redirected opkg cache to the hdd by adding the line below to /etc/opkg/opkg.conf

option cache_dir /hdd/opkg/cache

I assume the directory must exists, so I've created it on the disk. One can also redirect the temporary directory, but I haven't tested this.

After that I've succesfully upgraded the system, but some warnings appeared.

(eg. "Failed to open ///var/lib/opkg/info/enigma2.list" - this file is empty now). Perhaps the earlier failed upgrades damaged something.

(btw. failed upgrades leave junk on the flash, most probably some temporary files, which disappeared after reboot - I've checked it with df.)

I will eventually reinstall the system, but my point is that current image size for uno is problematic. Its near the flash limit and usually you will add a few extra packages. There is always a risk of damaging the system during upgrade but with so little space on the device it must just happen sooner or later.

Maybe it would be enough to move less critical files to hdd, which I suspect most users have in their tuners?