Sorry to read of your difficulty with sound in your notebook. Reference your notebook having an ALC259, I note you are not the first to have this problem. Please note these two threads:
From the diagnostic script output, I note your laptop’s mixer is not yet properly tuned. See below from diagnostic script: Simple mixer control ‘Speaker’,0
Capabilities: pvolume pswitch penum
Playback channels: Front Left - Front Right
Limits: Playback 0 - 87
Mono:
Front Left: Playback 0 0%] -65.25dB] [on]
Front Right: Playback 0 [0%] -65.25dB] [on]
Please try moving that volume control up to 95% for a test. Does that help ?
I note I gave the same advice in one of the above threads, but that was unfortunately not sufficient to help the user.
If that is the case, then you could consider updating alsa per the wiki guidance here: SDB:Alsa-update - openSUSE That would entail installing alsa-driver-kmp-default and also updating alsa-firmware, alsa-plugins, alsa-utils, alsa-plugins-pulse, alsa-oss, alsa and libasound2 (where care is needed to ensure they are actually updated properly). Note that wiki is out of date in terms of the kernel # not being precisely. Please follow the philosophy of the thread …
Also, if it is not necessary to update alsa, then please do NOT do so. Once you go the route of having alsa-driver-kmp-default installed, it means every time there is a kernel update, you will also need to update alsa-driver-kmp-default and possibly the various alsa apps.
I also note you are likely a gnome user using pulse-audio. Please check carefully there that no pulse-audio issues are impacting your efforts to get sound functioning.