Seems to be a related situation here. Trying to install 'debian-bullseye-DI-alpha3-amd64-netinst.iso'
with Xfce on separate SSD. Installation with no error. Reboot and after grub system crashes 'black screen'. ~$ inxi -Fz System: Host: nostromo Kernel: 4.19.0-13-amd64 x86_64 bits: 64 Desktop: Xfce 4.12.4 Distro: Debian GNU/Linux 10 (buster) Machine: Type: Desktop Mobo: ASUSTeK model: PRIME X370-A v: Rev X.0x serial: <filter> UEFI: American Megatrends v: 5602 date: 07/14/2020 CPU: Topology: 6-Core model: AMD Ryzen 5 2600 bits: 64 type: MT MCP L2 cache: 3072 KiB Speed: 1484 MHz min/max: 1550/3400 MHz Core speeds (MHz): 1: 1434 2: 1423 3: 1390 4: 1464 5: 1547 6: 1452 7: 1437 8: 1377 9: 1408 10: 1380 11: 1548 12: 1399 Graphics: Device-1: NVIDIA GP108 driver: nvidia v: 418.152.00 Display: x11 server: X.Org 1.20.4 driver: nvidia unloaded: fbdev,modesetting,nouveau,vesa resolution: 1680x1050~60Hz OpenGL: renderer: GeForce GT 1030/PCIe/SSE2 v: 4.6.0 NVIDIA 418.152.00 Audio: Device-1: Conexant Systems CX23887/8 PCIe Broadcast Audio and Video Decoder with 3D Comb driver: cx23885 Device-2: NVIDIA GP108 High Definition Audio driver: snd_hda_intel Device-3: AMD Family 17h HD Audio driver: snd_hda_intel Sound Server: ALSA v: k4.19.0-13-amd64 Network: Device-1: Realtek RTL8111/8168/8411 PCI Express Gigabit Ethernet driver: r8169 IF: enp7s0 state: up speed: 100 Mbps duplex: full mac: <filter> Drives: Local Storage: total: 2.04 TiB used: 279.54 GiB (13.4%) ID-1: /dev/sda vendor: Kingston model: SA400S37120G size: 111.79 GiB ID-2: /dev/sdb vendor: Western Digital model: WD20EZRZ-00Z5HB0 size: 1.82 TiB ID-3: /dev/sdc vendor: Western Digital model: WDS120G2G0A-00JH30 size: 111.80 GiB Partition: ID-1: / size: 28.91 GiB used: 16.39 GiB (56.7%) fs: ext4 dev: /dev/sda2 ID-2: /home size: 68.40 GiB used: 5.88 GiB (8.6%) fs: ext4 dev: /dev/sda3 ID-3: swap-1 size: 18.63 GiB used: 0 KiB (0.0%) fs: swap dev: /dev/sdb2 Sensors: System Temperatures: cpu: 29.8 C mobo: N/A gpu: nvidia temp: 41 C Fan Speeds (RPM): cpu: 0 gpu: nvidia fan: 0% Info: Processes: 239 Uptime: 18m Memory: 15.66 GiB used: 1.22 GiB (7.8%) Shell: bash inxi: 3.0.32 ##in this hardware overview the separate SSD is removed## For a crosscheck I installed 'debian-10.7.0-amd64-netinst.iso' Xfce. System working! sources.list buster -> bullseye, update, upgrade, dist-upgrade, reboot and after grub system crashes 'black screen'. Restart again, now with kernel 4.19.0-13. System working! br KH
