Unable to set 48hz refresh rate on VAIO SX14, only 60hz is available

I 've a VAIO SX14 Laptop and believe I had exactly the behavior up to kernel 5.15 that was originally documented in #125 (closed) by the Bugzilla Migration User (48hz refresh rate shown, but maybe not working). Since, I think kernel 5.16 the 48hz refresh rate disappeared (Screenshot_20220706_161023). So, on request of @jani now a separate bug report. ;)

According to https://gitlab.freedesktop.org/drm/intel/-/wikis/How-to-file-i915-bugs

• uname -r is 5.19.0-rc5-1-mainline (precompiled linux-mainline from miffe.org since I can't afford building a linux kernel myself)
• uname -m is x86_64
• Distribution: https://manjaro.org/ with KDE Plasma
• sudo dmidecode > dmidecode dmidecode
• Display Connector: ???I have no idea what to do.???
• A littlebit messy to understand what to do, but I've added drm.debug=0x1e log_buf_len=16M in /etc/default/grubto the quiet cryptodrive... stuff of GRUB_CMDLINE_LINUX_DEFAULT. After sudo update-grub and sudo reboot now, this is the result sudo dmseg > dmesg dmesg.
• sudo cat /sys/kernel/debug/dri/0/i915_vbt > i915_vbt i915_vbt
• xrandr --verbose > xrandr_verbose xrandr_verbose
• xrandr --verbose | edid-decode > edid_decode edid_decode - Shows that there should be a 48hz mode
• sudo cat /sys/class/drm/card0-eDP-1/edid > edid edid
• drm_info > drm_info drm_info
• pacman -S intel-gpu-tools and sudo intel_reg dump --all > intel_reg_dump.txt intel_reg_dump.txt

Please tell me (link to tutorial etc.) what to do if more data is needed.

I look forward to your help to get the 48hz mode working. Thanks a lot ;)