I'm not sure about marble with SQM, but I can tell you how I did it in Berly and Brume 2. I went through the APP/Plugin page and installed the Luci add-on, and that worked for me.
Hello, thank you for the instructions! I'm doing the same, but for me the kmod-sched-cake package is missing, so I'm unable to get past the installation phase. I believe the cause is similar to what is outlined in the post I linked previously, the kmod repository has not been deployed yet for this architecture.
Thanks for the instructions again, however ssh wouldn't work either, since the repository has not been deployed yet, which means that the package is missing. (As I mentioned before.)
GL-B3000:~# opkg update
Downloading https://fw.gl-inet.com/releases/qsdk_v12/kmod-4.6/ipq50xx/Packages.gz
Updated list of available packages in /var/opkg-lists/glinet_core
Downloading https://fw.gl-inet.com/releases/qsdk_v12/packages-4.x/ipq50xx/glinet/Packages.gz
Updated list of available packages in /var/opkg-lists/glinet_gli_pub
Downloading https://fw.gl-inet.com/releases/qsdk_v12/packages-4.x/ipq50xx/packages/Packages.gz
Updated list of available packages in /var/opkg-lists/opnwrt_packages
Updating database.
Database update completed.
Yup, mainly because of the SoC maker I guess. You seem to have a MediaTek MT7981, which is the Brume, I guess? I have the Marble which has a Qualcomm SoC, namely the IPQ5018.
Hello @hecatae. Sorry for the mention, but I saw that 4.7 got released, and that you decided to install it. May I ask, did you encounter any issues so far, and more specifically, does SQM work on 4.7?