Huawei E3372h-153 on Linux - it's working!

[Vittorio Gambaletta (VittGam)]

Hi,

On 13/01/2016 14:24:59 CET, Ginzler, Tobias wrote:
> Hello,
>
> I just want to confirm that your fix
>
>> echo 6000 > /sys/class/net/wwan0/cdc_ncm/tx_max
>> echo 0 > /sys/class/net/wwan0/cdc_ncm/min_tx_pkt
>
> made my Huawei 3372s-153 able to connect to the 4G network. Without it, wwan0 remained silent and the dhcp client timed out.
>
> E3372s-153 firmware version: 21.297.05.00.00
> #lsusb
> Bus 001 Device 007: ID 12d1:1506 Huawei Technologies Co., Ltd. E398 LTE/UMTS/GSM Modem/Networkcard
> #uname -a
> 3.16.0-4-amd64 #1 SMP Debian 3.16.7-ckt11-1+deb8u3 (2015-08-04) x86_64 GNU/Linux

Thank you for testing, it is good to know that as of now this workaround will fix this problem on the E3372s too!

This workaround was not working on the E3372s with an older firmware version, as reported by other users.

Anyway, Linux kernel 4.2 and newer now contain a proper fix in the driver code that makes it behave like the vendor driver, so this workaround should not be needed there.

Cheers,
Vittorio