Hello everyone.
So I decided to get myself a Radeon Rx 7800 XT, on launch, because getting something on launch is always a good idea … 
The Graphic card is shown as AMD Device 747e. Works, but is missing some functionality. I guess I’ll have to wait for a kernel update…
My Problem is that, since I installed the card, my system fails to shutdown: everything closes as normal but, when it should turn off, It restarts instead. Choosing shutdown from the boot menu always works, but if Linux loads, It will just restart.
I also noticed that allowing the system to go into power saving, causes it to crash.
I hope you might be able to help me. I’ll will also post if the problem goes away after an update or something.
Thanks in advance. 
System:
Kernel: 6.5.3-zen1-1-zen arch: x86_64 bits: 64 compiler: gcc v: 13.2.1
clocksource: tsc available: hpet,acpi_pm
parameters: BOOT_IMAGE=/@/boot/vmlinuz-linux-zen
root=UUID=810cddd0-3d54-45f7-88fa-84f8b12b1038 rw rootflags=subvol=@
rd.udev.log_priority=3 vt.global_cursor_default=0 loglevel=3 ibt=off
Desktop: KDE Plasma v: 5.27.8 tk: Qt v: 5.15.10 wm: kwin_x11 vt: 2
dm: SDDM Distro: Garuda Linux base: Arch Linux
Machine:
Type: Desktop Mobo: ASUSTeK model: ROG STRIX B450-I GAMING v: Rev 1.xx
serial: <superuser required> UEFI: American Megatrends v: 5003
date: 02/03/2023
CPU:
Info: model: AMD Ryzen 7 3700X bits: 64 type: MT MCP arch: Zen 2 gen: 3
level: v3 note: check built: 2020-22 process: TSMC n7 (7nm)
family: 0x17 (23) model-id: 0x71 (113) stepping: 0 microcode: 0x8701030
Topology: cpus: 1x cores: 8 tpc: 2 threads: 16 smt: enabled cache:
L1: 512 KiB desc: d-8x32 KiB; i-8x32 KiB L2: 4 MiB desc: 8x512 KiB
L3: 32 MiB desc: 2x16 MiB
Speed (MHz): avg: 4034 high: 4100 min/max: 2200/4426 boost: enabled
scaling: driver: acpi-cpufreq governor: performance cores: 1: 4099 2: 4090
3: 4099 4: 4098 5: 4099 6: 4100 7: 4099 8: 4100 9: 3600 10: 4091 11: 4086
12: 3600 13: 4100 14: 4095 15: 4100 16: 4093 bogomips: 115205
Flags: avx avx2 ht lm nx pae sse sse2 sse3 sse4_1 sse4_2 sse4a ssse3 svm
Vulnerabilities: <filter>
Graphics:
Device-1: AMD vendor: Tul / PowerColor driver: amdgpu v: kernel pcie: gen: 4
speed: 16 GT/s lanes: 16 ports: active: DP-1,DP-2 empty: DP-3,HDMI-A-1
bus-ID: 09:00.0 chip-ID: 1002:747e class-ID: 0300
Device-2: Logitech Webcam C270 driver: snd-usb-audio,uvcvideo type: USB
rev: 2.0 speed: 480 Mb/s lanes: 1 mode: 2.0 bus-ID: 1-1:2 chip-ID: 046d:0825
class-ID: 0102 serial: <filter>
Display: x11 server: X.Org v: 21.1.8 with: Xwayland v: 23.2.0
compositor: kwin_x11 driver: X: loaded: amdgpu unloaded: modesetting,radeon
alternate: fbdev,vesa dri: radeonsi gpu: amdgpu display-ID: :0 screens: 1
Screen-1: 0 s-res: 4480x1440 s-dpi: 96 s-size: 1185x381mm (46.65x15.00")
s-diag: 1245mm (49.01")
Monitor-1: DP-1 mapped: DisplayPort-0 pos: bottom-l model: AOC 2590G4
serial: <filter> built: 2019 res: 1920x1080 dpi: 90 gamma: 1.2
size: 544x303mm (21.42x11.93") diag: 623mm (24.5") ratio: 16:9 modes:
max: 1920x1080 min: 720x400
Monitor-2: DP-2 mapped: DisplayPort-1 pos: primary,top-right
model: MSI MAG274QRF-QD serial: <filter> built: 2021 res: 2560x1440 dpi: 109
gamma: 1.2 size: 597x336mm (23.5x13.23") diag: 685mm (27") ratio: 16:9
modes: max: 2560x1440 min: 640x480
API: OpenGL v: 4.6 Mesa 23.1.7-arch1.1 renderer: AMD Radeon Graphics
(gfx1101 LLVM 16.0.6 DRM 3.54 6.5.3-zen1-1-zen) direct-render: Yes
Audio:
Device-1: AMD Navi 31 HDMI/DP Audio driver: snd_hda_intel v: kernel pcie:
gen: 4 speed: 16 GT/s lanes: 16 bus-ID: 09:00.1 chip-ID: 1002:ab30
class-ID: 0403
Device-2: AMD Starship/Matisse HD Audio vendor: ASUSTeK
driver: snd_hda_intel v: kernel pcie: gen: 4 speed: 16 GT/s lanes: 16
bus-ID: 0c:00.4 chip-ID: 1022:1487 class-ID: 0403
Device-3: Logitech Webcam C270 driver: snd-usb-audio,uvcvideo type: USB
rev: 2.0 speed: 480 Mb/s lanes: 1 mode: 2.0 bus-ID: 1-1:2 chip-ID: 046d:0825
class-ID: 0102 serial: <filter>
Device-4: Logitech G432 Gaming Headset
driver: hid-generic,snd-usb-audio,usbhid type: USB rev: 2.0 speed: 12 Mb/s
lanes: 1 mode: 1.1 bus-ID: 3-3:4 chip-ID: 046d:0a9c class-ID: 0300
serial: <filter>
API: ALSA v: k6.5.3-zen1-1-zen status: kernel-api with: aoss
type: oss-emulator tools: N/A
Server-1: sndiod v: N/A status: off tools: aucat,midicat,sndioctl
Server-2: PipeWire v: 0.3.80 status: active with: 1: pipewire-pulse
status: active 2: wireplumber status: active 3: pipewire-alsa type: plugin
4: pw-jack type: plugin tools: pactl,pw-cat,pw-cli,wpctl
Network:
Device-1: Intel I211 Gigabit Network vendor: ASUSTeK driver: igb v: kernel
pcie: gen: 1 speed: 2.5 GT/s lanes: 1 port: d000 bus-ID: 04:00.0
chip-ID: 8086:1539 class-ID: 0200
IF: enp4s0 state: up speed: 1000 Mbps duplex: full mac: <filter>
Device-2: Realtek RTL8822BE 802.11a/b/g/n/ac WiFi adapter vendor: ASUSTeK
driver: rtw_8822be v: N/A modules: rtw88_8822be pcie: gen: 1 speed: 2.5 GT/s
lanes: 1 port: c000 bus-ID: 05:00.0 chip-ID: 10ec:b822 class-ID: 0280
IF: wlp5s0 state: down mac: <filter>
Bluetooth:
Device-1: ASUSTek Bluetooth Radio driver: btusb v: 0.8 type: USB rev: 1.1
speed: 12 Mb/s lanes: 1 mode: 1.1 bus-ID: 1-8:6 chip-ID: 0b05:185c
class-ID: e001 serial: <filter>
Report: btmgmt ID: hci0 rfk-id: 1 state: up address: <filter> bt-v: 4.2
lmp-v: 8 status: discoverable: no pairing: no class-ID: 7c0104
Drives:
Local Storage: total: 3.66 TiB used: 2.83 TiB (77.2%)
SMART Message: Unable to run smartctl. Root privileges required.
ID-1: /dev/nvme0n1 maj-min: 259:3 vendor: Samsung
model: SSD 970 EVO Plus 2TB size: 1.82 TiB block-size: physical: 512 B
logical: 512 B speed: 31.6 Gb/s lanes: 4 tech: SSD serial: <filter>
fw-rev: 4B2QEXM7 temp: 45.9 C scheme: GPT
ID-2: /dev/nvme1n1 maj-min: 259:0 vendor: A-Data model: SX8200PNP
size: 953.87 GiB block-size: physical: 512 B logical: 512 B speed: 31.6 Gb/s
lanes: 4 tech: SSD serial: <filter> fw-rev: S0118C temp: 37.9 C
scheme: GPT
ID-3: /dev/sda maj-min: 8:0 vendor: Western Digital
model: WD10SPZX-00Z10T0 size: 931.51 GiB block-size: physical: 4096 B
logical: 512 B speed: 6.0 Gb/s tech: HDD rpm: 5400 serial: <filter>
fw-rev: 1A01 scheme: MBR
Partition:
ID-1: / raw-size: 953.57 GiB size: 953.57 GiB (100.00%)
used: 861.18 GiB (90.3%) fs: btrfs dev: /dev/nvme1n1p2 maj-min: 259:2
ID-2: /boot/efi raw-size: 300 MiB size: 299.4 MiB (99.80%)
used: 576 KiB (0.2%) fs: vfat dev: /dev/nvme1n1p1 maj-min: 259:1
ID-3: /home raw-size: 953.57 GiB size: 953.57 GiB (100.00%)
used: 861.18 GiB (90.3%) fs: btrfs dev: /dev/nvme1n1p2 maj-min: 259:2
ID-4: /var/log raw-size: 953.57 GiB size: 953.57 GiB (100.00%)
used: 861.18 GiB (90.3%) fs: btrfs dev: /dev/nvme1n1p2 maj-min: 259:2
ID-5: /var/tmp raw-size: 953.57 GiB size: 953.57 GiB (100.00%)
used: 861.18 GiB (90.3%) fs: btrfs dev: /dev/nvme1n1p2 maj-min: 259:2
Swap:
Kernel: swappiness: 133 (default 60) cache-pressure: 100 (default) zswap: no
ID-1: swap-1 type: zram size: 15.53 GiB used: 1.68 GiB (10.8%)
priority: 100 comp: zstd avail: lzo,lzo-rle,lz4,lz4hc,842 max-streams: 16
dev: /dev/zram0
Sensors:
System Temperatures: cpu: 51.0 C mobo: 58.0 C gpu: amdgpu temp: 52.0 C
mem: 66.0 C
Fan Speeds (rpm): cpu: 665 case-1: 635 gpu: amdgpu fan: 889
Power: 12v: 9.97 5v: N/A 3.3v: N/A vbat: 3.23 gpu: amdgpu watts: 58.00
Info:
Processes: 367 Uptime: 28m wakeups: 0 Memory: total: 16 GiB
available: 15.53 GiB used: 5.54 GiB (35.6%) Init: systemd v: 254
default: graphical tool: systemctl Compilers: gcc: 13.2.1 clang: 16.0.6
Packages: 2156 pm: pacman pkgs: 2144 libs: 602 tools: octopi,paru,yay
pm: flatpak pkgs: 12 Shell: fish v: 3.6.1 default: Bash v: 5.1.16
running-in: konsole inxi: 3.3.29
Garuda (2.6.16-1):
System install date: 2022-06-25
Last full system update: 2023-09-18
Is partially upgraded: No
Relevant software: snapper NetworkManager mkinitcpio
Windows dual boot: No/Undetected
Failed units: fancontrol.service
PS1: Found someone with the same Graphic card not fully recognized in Arch, nothing about the shutdown problem (nor answers either…). Amd Rx 7800 xt working but not showing up as the amd rx 7800 xt / Kernel & Hardware / Arch Linux Forums
PS2: Read about the reset instead Shutdown being a motherboard bug in some other place (lost the link). This motherboard never showed this behavior before. The solutions suggested involved messing with the USB configuration in the BIOS. Didn’t work for me.
) and I still need to test the power saving. But at least it will shutdown.