Greetings from an old Siduction user, since a few years
a Gentoo compiling nerd.
My guess is that the new linux-5.15.x has lost compatibility with old hardware. I tried extensibly to boot with the new kernel. My method to put the old .config into the new directory /usr/src/linux-5.15 and create a new one with:
make oldconfig
didn't work. I tried four times to figure out a new .config. Until I had the idea to grab the Towo Siduction kernel:
---
ral@maci:/boot$ vdir vmlinuz-5.15*
-rw-r--r-- 1 root root 7555296 Nov 12 16:01 vmlinuz-5.15.2-1-siduction-amd64
-rw-r--r-- 1 root root 7133824 Nov 13 13:57 vmlinuz-5.15.2-1.11.144
-rw-r--r-- 1 root root 7267776 Nov 13 20:46 vmlinuz-5.15.2-2.129.453
-rw-r--r-- 1 root root 7249344 Nov 14 16:59 vmlinuz-5.15.2-3.145.491
-rw-r--r-- 1 root root 7317856 Nov 15 14:41 vmlinuz-5.15.2-4.860.2435
---
It isn't a wrongly configured kernel source. Towos kernel boots with all the same error, something with:
ata1 error
I could make a photo from the boot screen before the computer reboots - if you are interested. I do have a Debian-Testing installation for the rescue (having Gentoo this might be necessary sometimes). There the Towo Siduction kernel also plays the same error. Something with the new kernel-5.15 and NVIDIA-MCP7x

# inxi -F
System: Host: maci Kernel: 5.14.18-1.162.5494 x86_64 bits: 64 Desktop: MATE 1.24.3 Distro: Gentoo Base System release 2.7
Machine: Type: Laptop System: Apple product: Macmini3,1 v: 1.0 serial: YM9340659G6
Mobo: Apple model: Mac-F22C86C8 serial: N/A UEFI: Apple v: MM31.88Z.00AD.B00.0907171535 date: 07/17/09
CPU: Info: Dual Core model: Intel Core2 Duo P8700 bits: 64 type: MCP cache: L2: 3 MiB
Speed: 1596 MHz min/max: 1596/1862 MHz Core speeds (MHz): 1: 1596 2: 1795
Graphics: Device-1: NVIDIA C79 [GeForce 9400] driver: nouveau v: kernel
Display: server: X.Org 1.20.13 driver: loaded: nouveau resolution: 1920x1080~60Hz
OpenGL: renderer: N/A v: N/A
Audio: Device-1: NVIDIA MCP79 High Definition Audio driver: snd_hda_intel
Sound Server-1: ALSA v: k5.14.18-1.162.5494 running: yes
Sound Server-2: PulseAudio v: 15.0 running: yes
Network: Device-1: NVIDIA MCP79 Ethernet driver: forcedeth
IF: enp0s10 state: down mac: 00:26:b0:d8:53:d4
Device-2: Broadcom BCM4321 802.11a/b/g/n driver: b43-pci-bridge
IF-ID-1: wlan0 state: up mac: 00:26:08:ed:96:26
Bluetooth: Device-1: Apple Bluetooth USB Host Controller type: USB driver: N/A
Report: This feature requires one of these tools: hciconfig/bt-adapter
Drives: Local Storage: total: 465.76 GiB used: 137.89 GiB (29.6%)
ID-1: /dev/sda vendor: Toshiba model: MQ01ABF050 size: 465.76 GiB
Partition: ID-1: / size: 27.44 GiB used: 21.12 GiB (77.0%) fs: ext4 dev: /dev/sda3
ID-2: /home size: 93.99 GiB used: 90.54 GiB (96.3%) fs: ext4 dev: /dev/dm-0
Swap: ID-1: swap-1 type: partition size: 1024 MiB used: 302.5 MiB (29.5%) dev: /dev/sda5
ID-2: swap-2 type: partition size: 2 GiB used: 0 KiB (0.0%) dev: /dev/sda9
Sensors: Missing: Required tool sensors not installed. Check --recommends
Info: Processes: 154 Uptime: 5h 38m Memory: 3.59 GiB used: 1.69 GiB (46.9%) Shell: Bash inxi: 3.3.08
I do have some higher CPU speed available, but I don't want my 12y old system to heat.