Firefox - CTRL or SHIFT or ALT not working in Guest VM

[gb00s]

Proxmox 6.4 / Firefox 88.0.1

My journey with Firefox issues continues. Now I'm unable to use CTRL- or SHIFT- or ALT -keys in the console of a guest in Firefox. In Chromium it works just fine. Each of these do not work and it's not a matter of the issues with CTRL-ALT-SHIFT issues in the past.

Does anyone experience the same issue?

 

[Moayad]

Does the problem occur with only one VM or all VMs?

Are you use SPICE or noVNC?

Please post a full output of the pveversion -v also the VM config qm config <VMID>

 

[gb00s]

@Moayad

Thank you for the quick reply. Unfortunately, the issue appears in all virtual machines after upgrade to 6.4-4. I also tested and upgraded to 6.4-5 and have the same problem. I'm using noVNC exclusively. Maybe the issue startet together with Firefox 88.

Here I'm posting the output of pvmversion -v of one of the hosts. They are all the same.

root@pve1:~# pveversion -v
proxmox-ve: 6.4-1 (running kernel: 5.4.106-1-pve)
pve-manager: 6.4-5 (running version: 6.4-5/6c7bf5de)
pve-kernel-5.4: 6.4-1
pve-kernel-helper: 6.4-1
pve-kernel-5.4.106-1-pve: 5.4.106-1
pve-kernel-5.4.103-1-pve: 5.4.103-1
pve-kernel-5.4.73-1-pve: 5.4.73-1
ceph-fuse: 12.2.11+dfsg1-2.1+b1
corosync: 3.1.2-pve1
criu: 3.11-3
glusterfs-client: 5.5-3
ifupdown: residual config
ifupdown2: 3.0.0-1+pve3
ksm-control-daemon: 1.3-1
libjs-extjs: 6.0.1-10
libknet1: 1.20-pve1
libproxmox-acme-perl: 1.0.8
libproxmox-backup-qemu0: 1.0.3-1
libpve-access-control: 6.4-1
libpve-apiclient-perl: 3.1-3
libpve-common-perl: 6.4-2
libpve-guest-common-perl: 3.1-5
libpve-http-server-perl: 3.2-1
libpve-storage-perl: 6.4-1
libqb0: 1.0.5-1
libspice-server1: 0.14.2-4~pve6+1
lvm2: 2.03.02-pve4
lxc-pve: 4.0.6-2
lxcfs: 4.0.6-pve1
novnc-pve: 1.1.0-1
proxmox-backup-client: 1.1.5-1
proxmox-mini-journalreader: 1.1-1
proxmox-widget-toolkit: 2.5-3
pve-cluster: 6.4-1
pve-container: 3.3-5
pve-docs: 6.4-1
pve-edk2-firmware: 2.20200531-1
pve-firewall: 4.1-3
pve-firmware: 3.2-2
pve-ha-manager: 3.1-1
pve-i18n: 2.3-1
pve-qemu-kvm: 5.2.0-6
pve-xtermjs: 4.7.0-3
qemu-server: 6.4-2
smartmontools: 7.2-pve2
spiceterm: 3.1-1
vncterm: 1.6-2
zfsutils-linux: 2.0.4-pve1
root@pve1:~#

Additionally I provide two config outputs of 2 vm's.

oot@prox2:~# qm config 1001
agent: 1
balloon: 4096
boot: order=scsi0;net0
cores: 4
cpu: host,flags=+aes
memory: 16382
name: port0
net0: virtio=6E:BB:87:24:53:14,bridge=vmbr0,firewall=1
numa: 1
onboot: 1
ostype: l26
protection: 1
scsi0: VM:vm-1001-disk-0,cache=writeback,discard=on,iothread=1,size=50G,ssd=1
scsihw: virtio-scsi-single
smbios1: uuid=dd38b8e8-f12d-4acb-ac6b-83d6f44b30ac
sockets: 2
startup: order=1,up=10
vmgenid: 95aaa35f-b315-417a-9789-f4842b5b9ecd
root@prox2:~#

and

root@pve1:~# qm config 800
agent: 1
bios: seabios
boot: order=scsi0
cores: 8
cpu: host
memory: 32768
name: nh-fun2build0
net0: e1000=16:05:16:2E:62:14,bridge=vmbr0,firewall=1
numa: 1
ostype: l26
scsi0: VM:vm-800-disk-0,cache=writeback,iothread=1,size=100G,ssd=1
scsihw: virtio-scsi-single
smbios1: uuid=055e14b3-3214-412a-8c9a-91a165f63f68
sockets: 2
vga: vmware,memory=512
vmgenid: 383f9366-dd61-4a53-9b9a-9cfbcff51e7c
root@pve1:~#

 

[Moayad]

Thank you for the VM configs and the version.

I just tested it on my workstation the keys on Firefox 88.0.1 (OS Ubuntu) the SHIFT, ALT and CTRL are works.

Have you tried to open noVNC on a different browser?

 

[gb00s]

@Moayad

Yes, as mentioned in the opening thread, Chromium works. Tested other browsers as well. But they are all Chromium-based. It's just Firefox. Just wondering what the issue is and where to look for settings to be changed.

Any advice?

 

[ramrot]

@Moayad

Yes, as mentioned in the opening thread, Chromium works. Tested other browsers as well. But they are all Chromium-based. It's just Firefox. Just wondering what the issue is and where to look for settings to be changed.

Any advice?

maybe a plugin/extension on firefox messing with the keys?

 

[gb00s]

Unfortunately, even with all addon's disabled I have the same issue. Also, there is no difference between FF on Windows and/or Linux. I almost ruled out everything that could point to a problem on the host itself. But other browsers don't show the issue and even different plaforms make no difference with FF.

 

[PrimozR]

Old thread, but just to add my findings in 2024:

I had the same issue with Shift, Alt, Ctrl not being recognized in Librewolf (based on FF), version 129 and earlier too.
While it works fine on FF 130 and Chromium-based browsers.
I found a hint on Reddit, pointing to fingerprinting protection.

I disabled "Enable ResistFingerprinting" in Settings > Librewolf > Fingerprinting. After that, modifier keys work fine via noVNC.

I assume the issue in FF was also caused by fingerprinting protection and got fixed since then.

 

[rottenronnie]

Old thread, but just to add my findings in 2024:

I had the same issue with Shift, Alt, Ctrl not being recognized in Librewolf (based on FF), version 129 and earlier too.
While it works fine on FF 130 and Chromium-based browsers.
I found a hint on Reddit, pointing to fingerprinting protection.

I disabled "Enable ResistFingerprinting" in Settings > Librewolf > Fingerprinting. After that, modifier keys work fine via noVNC.

I assume the issue in FF was also caused by fingerprinting protection and got fixed since then.

You saved me a ton of grief. Thank you for pointing out that FireFox was not working correctly with PVE VMs. Chromium worked perfectly.

Cheers!