In Cachyos, my vitualbox guest edition of Windows runs extremely slow. Every thing I do in the Windows guest session (logging in, running a program, openning / closing windows, etc) is 2-5x slower than in other linux boots (same computer).
Exact same Windows guest image and settings runs fine under KDE Neon and Ubuntu Gnome. I’ve tried a few settings changes, but nothing seems to fix the problem.
For the record, I have a list of “wants” for the perfect OS and cachyos (KDE) hits most of them! I’ve been using cachyos for about a week and everything is looking awesome, except for this virtualbox problem.
Did you install VirtualBox Extension Pack too ?
Yep!
Most things seem to take about 2x-3x time (booting the Windows guest, opening any software, etc) with graphical things taking 3-5x. A simple zoom-in using a graph viewing tool I use, is painfully slow.
FYI, I installed a random linux OS (tuxedo), and using it, seemed about normal for a virtual guest. So it seems the problem is isolated to cachyos as host + Windows(11) as guest.
I use VirtualBox only for Linux desktops and server testing. I have no experience with Windows VM.
Likely, you are not passing the cpu correctly or so. Consider to use vmware. its way better then vbox.
I tried vmware, lots of black screens. I’d really like to fix virtualbox so I can keep using Cachyos, it’s awesome so far otherwise.
What are your settings for VMs?
I usually use 4 cores for CPU and 8 GB RAM at least. And 128 MB for virtual card of course.
I tried a few different setups, but yes, at least what you just stated. And also up to 12 cores, 16GB Ram, and 256 for virtual card.
I may have found the problem.
Running “hdparm -tT /dev/a-mounted-partition” on cachyos is about 1/2 as fast compared to the same command & partition on 2 other linux os’s (Neon and Ubuntu).
CachyOS does not modify anything filesystem quirks or equal. in case of btrfs/zfs it enables compression, but besides that not.
When you are comparing such result, you should use the same filesystem.
The partition I “speed checked” is formatted as ext4.
Currently, cachyos “/” is formatted as btrfs.
Neon and ubuntu “/” are formatted as ext4.
Are you saying it is expected that btrfs is half as fast as ext4 in this case?
Update, I tested virtualbox speed, and hdparm results on several os installs, and hdparm results do not predict virtualbox performance.
So, back to ground zero.
Current status; Virtualbox is unusable in cachyos (due to very slow responsiveness of guest sessions), but fine in 3 other linux installs.
Well, bummer, I could never figure this out. So, moving to some other distro.