[solved] Hyper-v resolution

Q&A
1

Hi all,
The problem I got (and I am not sure if it is Hyper-v related) no matter the desktop I am using the resolution is always 1024*576.
bundles I’ve installed are desktop-autostart, desktop-lxqt, X11-server
and I’ve used the premade hyper-V virtual disk
Is there any fix for that?
Best

2

Hi,

Have similar issue, apparently this seems to be a limitation of hyper-v. You might need to use RDP to get over it.

Regards,
Sriram

3

Hi Sriram,

To be honest I did checked on this RDP thing but I am unsure of how to use it. Also, I have no administrative rights on this computer so I need to have something concrete to check with the IT department.

Best

4

You can change the resolution on Linux VMs in Hyper-V by adding a kernel command line boot parameter: video=hyperv_fb:1920×1080.

5

Could you please direct me to a walkthrough for adding that parameter? I never played around with kernel optimization, etc. (or actually I can not find the grub.conf to add the line). Probably clearlinux does not use grub menu?
Best

6

Clear Linux uses systemd.boot as the bootloader. You can mount your ESP partition (e.g. /boot), and look info the file /boot/loader/loader.conf, it specifies which boot entry the system is booting, there must have a file under /boot/loader/entries/ match the file name. Look into that boot entry file, the kernel option is specified by the options key.

2 Likes
7

Could you please direct me to a walkthrough for adding that parameter? I never played around with kernel optimization, etc. (or actually I can not find the grub.conf to add the line). Probably clearlinux does not use grub menu?

CL uses systemd-boot instead of grub and clr-boot-manager to add
new kernel parameter.

So to add new parameter do:

sudo mkdir -p /etc/kernel/cmdline.d/
echo "video=hyperv_fb:1920×1080" | sudo tee /etc/kernel/cmdline.d/hyperv-video.conf
sudo clr-boot-manager update

and reboot your VM.

for more info check man clr-boot-manager

1 Like
8

Hi again,
it seems that hyper-v has a limitation. ex it does not support my native resolution (2560x1440)
thank you for the replies

9

this did not really worked

10

this worked. but still it appears as if an inherited limit for the resolution is in place!