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Debian 10 very slow on Virtual Machine Manager (VMM)
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Debian 10 very slow on Virtual Machine Manager (VMM)
Hello I installed debian 10 on the virtual machine manager, I dedicate to the vm 4 cores from 16, 4 GB of ram, and 50 gb space.
the installation went really slowly, and the system runs also extremly slowly now, how can I check if the problem are maybe the graphic acceleration drivers, and how to install them ?
the installation went really slowly, and the system runs also extremly slowly now, how can I check if the problem are maybe the graphic acceleration drivers, and how to install them ?
Re: Debian 10 very slow on Virtual Machine Manager (VMM)
I'm not familiair with VMM, so I ask you: why not Oracle Virtualbox ??
https://www.virtualbox.org/wiki/Linux_Downloads
https://www.virtualbox.org/wiki/Linux_Downloads
Debian 10 - Buster on Compulab Fitlet2
Debian 12 - Bookworm on Acer Spin 1
Debian 12 - Bookworm on Acer Spin 1
- Head_on_a_Stick
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Re: Debian 10 very slow on Virtual Machine Manager (VMM)
Because it's crap. And it's been removed from the Debian stable release.fred44nl wrote:why not Oracle Virtualbox ?
Is KVM enabled in virt-manager and have you enabled the hardware virtualisation extensions in the firmware ("BIOS") options of the host machine?justarandom12 wrote:the system runs also extremly slowly
See also https://wiki.debian.org/KVM
deadbang
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Re: Debian 10 very slow on Virtual Machine Manager (VMM)
Thank you for your answer, you were right, the virtualisation in the bios wasnt activated, unfortunately to active it, didnt solve the problem.Head_on_a_Stick wrote:Because it's crap. And it's been removed from the Debian stable release.fred44nl wrote:why not Oracle Virtualbox ?
Is KVM enabled in virt-manager and have you enabled the hardware virtualisation extensions in the firmware ("BIOS") options of the host machine?justarandom12 wrote:the system runs also extremly slowly
See also https://wiki.debian.org/KVM
I dont know exactly what you mean by enable KVM, I installed it with sudo apt install qemu qemu-kvm qemu-system qemu-utils
and started the VMM Manager, then installed debian 10. Sorry for my mistakes Im very young and just started with linux.
Last edited by justarandom12 on 2020-05-09 14:02, edited 1 time in total.
- Head_on_a_Stick
- Posts: 14114
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Re: Debian 10 very slow on Virtual Machine Manager (VMM)
I don't use virt-manager myself so I'm not sure how to enable KVM in that but you can start your VM then check if the -enable-kvm option is applied:
Also check if the kernel module is loaded:
If the VM was installed with hardware virtualisation disabled then perhaps virt-manager doesn't try to enable it afterwards but I don't really know for sure. Consult the Debian wiki page to which I linked earlier.
Code: Select all
pgrep -a qemu-system
Code: Select all
lsmod|grep kvm
deadbang
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Re: Debian 10 very slow on Virtual Machine Manager (VMM)
Head_on_a_Stick wrote:I don't use virt-manager myself so I'm not sure how to enable KVM in that but you can start your VM then check if the -enable-kvm option is applied:Also check if the kernel module is loaded:Code: Select all
pgrep -a qemu-system
If the VM was installed with hardware virtualisation disabled then perhaps virt-manager doesn't try to enable it afterwards but I don't really know for sure. Consult the Debian wiki page to which I linked earlier.Code: Select all
lsmod|grep kvm
Code: Select all
pgrep -a qemu-system
Code: Select all
lsmod|grep kvm
irq bypass 1
maybe just reinstall with activated virtualisation in Bios ?
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Re: Debian 10 very slow on Virtual Machine Manager (VMM)
it looks like reinstalling with virtualisation activated will solve the problem, it installs much smoother and faster now and the cpu usage looks much different and better.
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Re: Debian 10 very slow on Virtual Machine Manager (VMM)
ok after reinstall it works like 50% faster and better, but its far away from "smooth". I dont know what else I can try ?
Re: Debian 10 very slow on Virtual Machine Manager (VMM)
What's your host OS?justarandom12 wrote:Hello I installed debian 10 on the virtual machine manager . . . .
Several weeks ago Head_on_a_Stick posted instructions on how to use qemu directly. Search the forum for it.
If you need a GUI, try Gnome-Boxes. It lacks refinements found on more complicated GUIs but is easy for a novice to use.
BTW, generally the client (in your case Debian 10) needs some software installed. That means some #apt install [package] from the client.
Re: Debian 10 very slow on Virtual Machine Manager (VMM)
Possibly a little bit late: But in my case it was related to Wayland. I was encountering the same issue with Bullseye/Debian 11. Default, the gnome shell environment was using Wayland instead of Xorg. After switching to a session using Xorg Xserver, the speed was almost comparible to a session on a non-virtual pc or laptop. If unsure what you are currently using, you could always double check with: `ps -efa|grep -i xorg'. If the xorg process is not running, you are most likely still using Wayland.