5700G bad GNOME performance without Wayland

[LangDuTienTu]

Iam using Proxmox VE 7.2-4 latest, and having this problem. I will try my best to describe it clearly.

I have Debian 11 with GNOME Desktop environment. Everything is smooth unless I disable Wayland by setting WaylandEnable=false in /etc/gdm3/daemon.conf

Strange thing is, this problem does not encounter in the past with AMD 3700X, it only happens after I upgrade the CPU to 5700G. With 3700X, everything is smooth whatever with or without Wayland.

This problem can be fixed if I set the CPU type to kvm64 instead of host. But this CPU type is not the thing I want, additional I wanna find what happend with the 5700G and how to deal with it.

Can anyone give me the answer.... Thank you.

 

[t.lamprecht]

Can you please post the full VM config? qm config VMID

This is rather interesting, as some colleagues here reported to me that their VM performance was better with Wayland disabled, but I couldn't really reproduce that (to be fair, I didn't tried that hard though).

 

[LangDuTienTu]

Can you please post the full VM config? qm config VMID

This is rather interesting, as some colleagues here reported to me that their VM performance was better with Wayland disabled, but I couldn't really reproduce that (to be fair, I didn't tried that hard though).

Here it is

acpi: 1
agent: 1
bios: ovmf
boot:
cores: 6
cpuunits: 10240
efidisk0: local-lvm:vm-121-disk-0,efitype=4m,size=4M
hostpci0: 0000:0b:00.0;0000:0b:00.1,pcie=1
hostpci1: 0000:0a:00.0;0000:09:00.0;0000:04:00.0;0000:03:00.0,pcie=1
ide2: local:iso/debian-11.3.0-amd64-netinst.iso,media=cdrom,size=378M
machine: q35
memory: 16384
meta: creation-qemu=6.2.0,ctime=1653124809
name: Ivy-NAS
numa: 1
ostype: l26
scsihw: virtio-scsi-single
smbios1: uuid=faa35b2c-abd9-4e51-a02b-c15ff75e7600
sockets: 1
vmgenid: 528a6a4c-1318-43c8-a2ae-bafb8ab5c6c5

 

[LangDuTienTu]

I wanna inform you that I find a workaround solution by changing Display > Graphic card to SPICE or VirtIO-GPU or VirGL GPU.
By this way Iam now able to set CPU type to host and disable Wayland, and still having smooth GUI. In comparison, SPICE is so so, VirtIO-GPU is smooth, and VirGL GPU is smooth too but the animation is redundant.

I guess that Debian/Ubuntu has bad amdgpu drivers, combined with Integrated GPU is not passthrough is the cause of this bad GUI performance on 5700G. So using virtual GPU is a better one.

Iam not sure this workaround is the best solution. If anyone has something new please let me know.