Re: 3G-Internet-band width - load balancing not working proper in Stretch

[JPlews <jw@plews.org.uk>]

On 17/06/17 16:12, Zei Ha gmx.net wrote:
> Hello,
>
> I'm using Stretch for a long time now on an amd64-PC together with a
> 3G-Internet-Modem-Stick. The behaviour how Stretch handles the band
> width and does load balancing between different applications is simply
> disastrous! For example: if I download large updates per "apt" it is
> not possible to open-up/load any site in "firefox"; just at the moment,
> when "apt" switches from one download to the other, than the page in
> "firefox" begins to load (as slow as if I had an ancient
> 56k dial-up-modem...). Also Stretch does not tap the full potential
> of the 3G-Modem's speed I guess - and this is not a provider-thing!
>
> With the same PC and another Linux-distribution all this does not
> happen, so this is obviously Stretch-related! By the way: it also worked
> fine in Jessie... - so maybe it's a Debian-related "systemd-thing"?
>
> Due to the fact that Stretch comes out as "stable-version" within the
> next days (after almost doubled developing-time of two years), isn't
> that something to think about...?
>
> Regards
> Jack

A quick mitigation perhaps:

https://askubuntu.com/questions/88731/can-the-update-manager-download-only-a-single-package-at-a-time

With the info given I'd suspect the kernel first, it's quite possible 
for common drivers to not work or become sub optimal as new hardware is 
supported. I have had the same experiences with OpenWRT and these devices.

In the past I would have recommended just installing the previous 
version's kernel, but I'm not sure if a Jessie kernel is missing things 
systemd needs, which is a niche that Devuan may help with, or you could 
run Jessie in a VM and pass the USB device through to it.

IMO hardware solutions are going to be easiest, like replacing the modem 
(but then worrying about support again in the other direction) or put 
the current modem in something like a MR3020, I'd expect the factory 
firmware to have an oldish firmware and therefore be happy an older modem.

Hope that helps.

JP