GL-XE300 kernel downgraded

kmahyyg · April 25, 2021, 3:48pm

On Previous version of stable firmware, 3.201 version firmware kernel downgraded to 4.14.
3.200 version firmware kernel is 5.4.51.

@alzhao Is this intended or? Could you explain why?

kmahyyg · April 26, 2021, 6:07am

I also noticed that the default wwan device switched from /dev/cdc-wdm0 to /dev/ttyUSB4, what’s the difference? It seems that the first one is QMI protocol.

alzhao · April 26, 2021, 7:14am

I don’t know previous 3.200. 3.201 should all be based on openwrt 19.07.7 and having kernel 4.14

kmahyyg · April 26, 2021, 7:43am

I just downloaded your 3.200 firmware tar file in GL.iNet download center

Obviously, it’s Linux 5.4.51

alzhao · April 26, 2021, 7:45am

cdc-wdm0 is used for qmi mode
ttyUSB4 is serial mode

But now you can select qcm mode, which is better.

kmahyyg · April 26, 2021, 7:52am

Thanks.

Really interesting:

kmahyyg · June 5, 2021, 4:38am

I found a problem that /dev/ttyUSB4 for mode qcm and custom APN which was manually input from web UI cannot be saved into /etc/config/network.

Due to the above reason, I switched back to /dev/cdc-wdm0 and this time, my custom APN and qcm mode is working and saved into /etc/config/network.