NVIDIA RTX 5070 Ti causes black screen and very slow boot

I've recently purchased an **NVIDIA RTX 5070 Ti**, but it doesn't work properly under Linux. The card works **perfectly under Windows 11**, so hardware failure can be ruled out. When the PC boots, I **can see the GRUB menu**, but once the OS starts loading, I completely **lose video output** — no console, no graphical interface, not even kernel messages (unless using serial output). ## Test Environment I started over from a **clean minimal Debian Trixie installation (no X or Wayland)** with an **NVIDIA GTX 970**, which works fine. I then performed several tests while **capturing logs via the motherboard's RS232 serial port**. Initially, I was using **Debian stable (Bookworm)**, but I upgraded to **Trixie** thinking the issue might come from an outdated kernel. Unfortunately, this didn't help. I also tried the **latest kernel 6.16-rc7**, and the issue **remains exactly the same**. ### Test 1: Trixie + Kernel 6.12 and 6.16-rc7 (minimal system, no X) **GRUB configuration:**

GRUB_CMDLINE_LINUX_DEFAULT="nomodeset vga=normal kvm.enable_virt_at_load=0 earlyprintk=serial,ttyS0,115200 console=tty0 console=ttyS0,115200 loglevel=7"
GRUB_TERMINAL="console serial"
GRUB_SERIAL_COMMAND="serial --speed=115200 --unit=0 --word=8 --parity=no --stop=1"

* ✅ Boot with **GTX 970** * ❌ Boot with **RTX 5070 Ti** => [logs](https://gist.github.com/aprovin/8e385c1b2a8875617ccb25f83cb2a609) --- ### Test 2: Trixie + Kernel 6.16-rc7 (more debug enabled) **GRUB configuration:**

GRUB_CMDLINE_LINUX_DEFAULT="nomodeset vga=normal earlyprintk=serial,ttyS0,115200 console=tty0 console=ttyS0,115200 loglevel=7 debug ignore_loglevel initcall_debug"
GRUB_TERMINAL="console serial"
GRUB_SERIAL_COMMAND="serial --speed=115200 --unit=0 --word=8 --parity=no --stop=1"

* ✅ Boot with **GTX 970** * ❌ Boot with **RTX 5070 Ti** => [logs](https://gist.github.com/aprovin/f5c99475f03f2f5e627ee09d0b7e9160) --- ### Test 3: Same as Test 2, but with **NVIDIA proprietary driver installed** Installed the latest NVIDIA open-source kernel modules: * [https://github.com/NVIDIA/open-gpu-kernel-modules](https://github.com/NVIDIA/open-gpu-kernel-modules) * ./NVIDIA-Linux-x86_64-575.64.03.run --no-opengl-files --no-kernel-modules Blacklist nouveau driver:

cat /etc/modprobe.d/blacklist-nvidia-nouveau.conf
blacklist nouveau
options nouveau modeset=0

* ✅ Boot with **GTX 970** * ❌ Boot with **RTX 5070 Ti** => [logs](https://gist.github.com/aprovin/4b781bb1a8e9bd9e8212e9e9f19455cd) --- ### Test 4: Same as Test 3, with **CSM disabled in BIOS** * ✅ Boot with **GTX 970** * ❌ Boot with **RTX 5070 Ti** => [logs](https://gist.github.com/aprovin/593b07bc67908372764ab47aea8f83c2) --- ## 🖥️ Hardware * **Motherboard**: ASUS PRIME B550M-A (BIOS fully updated) * **CPU**: AMD Ryzen 7 5800X3D (no integrated GPU) * **GPU**: NVIDIA RTX 5070 Ti * **Disk**: NVMe SSD * **Display**: Single monitor via HDMI (same issue with DisplayPort) ### Notes: * I’ve tried multiple HDMI/DP cables and different monitors — no change. * I've also tried **Ubuntu 25.04**, same result. --- ## Additional symptoms * The **boot process is extremely slow** with the RTX 5070 Ti (several minutes) * The same boot completes in **seconds with the GTX 970** --- ## I’m out of ideas... Has anyone managed to boot Linux with an RTX 5070 Ti? Any help would be greatly appreciated.