1. A graphics driver is installed on the GPU instance.
When you log in to a GPU instance via VNC, the default process accesses the QEMU-emulated VGA device to retrieve the operating system’s framebuffer. After the GPU graphics driver is installed, the framebuffer is no longer handled by the VGA device, making it inaccessible through VNC.
2. Due to other reasons, such as the installation of third-party software that conflicts with the operating system, the system fails to start successfully.
2. For GPU instances with a graphics driver installed, you can manually install a VNC Server on the instance. After installation, you can log in using a VNC Client from your local machine.
Obtain the VNC Server/Client installation package independently.
3. If the issue is confirmed to be caused by reason 1, you can disable the GPU driver using a TAT command. After disabling the driver, you can log in to the instance through the console VNC. Navigate to Display Settings > Extend These Monitors > Show Only on 1. After completing the process, use the TAT command again to re-enable the GPU driver.
4. Check the installed third-party software to analyze potential reasons for the inability to log in to the instance via VNC.
It is recommended to uninstall the third-party software or reinstall the system.
