Kernel of Linksys E7350 looked not being upgraded since 24.10.1

[tonyc20]

Kernel of Linksys E7350 looked not being upgraded and has stayed at 6.6.68 since 24.10.1.

Inconsistently, kernel modules were being upgraded, at least their path e.g. /lib/modules/6.6.110/ were, therefore cannot link kernel objects, and subsequently many functions like Wi-Fi failed.

Fortunately LuCI seemed working and can downgrade back to 24.10.1, which has been the last proper version.

A symbolic link may serve as workaround to bring Wi-Fi back but certainly not the correct solution though.

Anyway, is it just me or anyone else also encountered this?

[psherman]

I have one of these devices and it is properly showing the kernel for 24.10.4 as 6.6.110.

What is the output of:

ubus call system board

And how have you been running your upgrades?

[tonyc20]

Thanks! Looks like it was just mine and eventually everything's ok right now.

In 24.10.1:

root@OpenWrt:~# ubus call system board
{
        "kernel": "6.6.86",
        "hostname": "OpenWrt",
        "system": "MediaTek MT7621 ver:1 eco:3",
        "model": "Linksys E7350",
        "board_name": "linksys,e7350",
        "rootfs_type": "squashfs",
        "release": {
                "distribution": "OpenWrt",
                "version": "24.10.1",
                "revision": "r28597-0425664679",
                "target": "ramips/mt7621",
                "description": "OpenWrt 24.10.1 r28597-0425664679",
                "builddate": "1744562312"
        }
}

Upload 24.10.2 image file openwrt-24.10.2-ramips-mt7621-linksys_e7350-squashfs-sysupgrade.bin to LuCI and flash it without keeping settings.

In 24.10.2:

root@OpenWrt:~# ubus call system board
{
        "kernel": "6.6.93",
        "hostname": "OpenWrt",
        "system": "MediaTek MT7621 ver:1 eco:3",
        "model": "Linksys E7350",
        "board_name": "linksys,e7350",
        "rootfs_type": "squashfs",
        "release": {
                "distribution": "OpenWrt",
                "version": "24.10.2",
                "revision": "r28739-d9340319c6",
                "target": "ramips/mt7621",
                "description": "OpenWrt 24.10.2 r28739-d9340319c6",
                "builddate": "1750711236"
        }
}

Unlike previous image flashing, this time kernel was upgraded and Wi-Fi worked!
Not sure which step went wrong during previous image flashing but anyway it seems ok now.
Further flashing to latest 24.10.4 was also fine.
Thanks!!

[tonyc20]

Oh wait another E7350 got that ...

root@OpenWrt:~# ubus call system board
{
        "kernel": "6.6.86",
        "hostname": "OpenWrt",
        "system": "MediaTek MT7621 ver:1 eco:3",
        "model": "Linksys E7350",
        "board_name": "linksys,e7350",
        "rootfs_type": "squashfs",
        "release": {
                "distribution": "OpenWrt",
                "version": "24.10.4",
                "revision": "r28959-29397011cc",
                "target": "ramips/mt7621",
                "description": "OpenWrt 24.10.4 r28959-29397011cc",
                "builddate": "1760891865"
        }
}

Should be same steps on these two E7350 routers though ...

[efahl]

If you want to go to the real source of truth:

$ cat /proc/version
Linux version 6.6.110 (builder@buildhost) (x86_64-openwrt-linux-musl-gcc (OpenWrt GCC 13.3.0 r28959-29397011cc) 13.3.0, GNU ld (GNU Binutils) 2.42) #0 SMP Sun Oct 19 16:37:45 2025