I've reproduced the issue on Piledriver platform with AMD 9590 CPU, with both ATI and Nvidia PCI GPUs.
With the ATI GPU, I get the usual symptom of the computer freezing display while the GNOME desktop is partially loaded. It's possible to open a TTY console by switching consoles but once returned to the graphical desktop, the computer becomes definitely unresponsive. This is similar to what is seen on older hardware like K10 or K8 platforms. With the Nvidia GPUs, I get garbage (we can even notice some parts of the GNOME desktop), and the computer is unresponsive. Sometime the display is lost then returns and it cycles like that. This is the usual symptom seen on older hardware like K10 and K8 platforms. ** Attachment added: "Screenshot of graphical issues on Nvidia Geforce 8400GS rev.2 PCI on Piledriver PCIe host" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1902795/+attachment/5432604/+files/20201109-110741-000.nvidia-geforce-8400gsr2-pci+piledriver.jpg ** Summary changed: - PCI graphics broken on AMD K8/K10 platform (while it works on Intel) verified from Linux 4.4 to 5.10-rc1 + PCI graphics broken on AMD K8/K10/Piledriver platform (while it works on Intel) verified from Linux 4.4 to 5.10-rc1 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1902795 Title: PCI graphics broken on AMD K8/K10/Piledriver platform (while it works on Intel) verified from Linux 4.4 to 5.10-rc1 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1902795/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
