Prox (7.4-3) web-gui crash on VM bootup

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Sgaile

New Member
Aug 11, 2025
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As listed, I use as of now 7.4-3 unti l can change my RAID controller.
I have a ZFS RAID1 of 2 disks for my PX System. 3 disks in ZFS RAIDZ for VMs/storage.

I tried with different Linux distros to create a VM with also different configurations in hardware specs and so on. Result was always the same:

1. VM starts booting and opens the graphical interface.
2. Sometimes I can do some configuration steps.
3. First I loose connection to the VM and shortly after my proxmox web gui becomes unresponsive and I have to fully reboot the system.

Anyone have that issue before or has an idea where I could look for the problem? I was genuinely surprised that px crashed so badly due to a malfunctioning vm.
 
leesteken said:
If you are using PCI passthrough in your VM then check your IOMMU groups: https://pve.proxmox.com/wiki/PCI_Passthrough#Verify_IOMMU_isolation
Otherwise there is no information to guess what might be the problem. And update your Proxmox since PVE 7 is years out of support.
Click to expand...
Noted. I will check those groups. Unfortunately an upgrade is not possible right now, since my RC is not supported by kernel 6+ it seems. As soon as I get it replaced with a hba controller of some form.

Thank you!
 
Update: After some digging I think I found that my IOMMU groups worked. A certain PCI device though, did not. I posted this too my other thread I opened since it very much seems my issues are connected and yes its the RC (originally hardware raid that was made into wannabe HBA through firmware).

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[SOLVED] Thread 'Seems my LVM is gone after Upgrade to new Version'

Hello,

Since I am not experienced Proxmox administrator or even user I am a bit at a loss on how to proceed:

The server I am using right now uses a PERC H330 RAID controller in HBA mode, although I am aware that this might be part of the issue. I have already seen parts of other threads mentioning that.

Short summary: I had to install PX7.4 (other versions did not detect any drives). While updating from 7.4 to 8.4 nothing seemed particularily off. On reboot i got the information, that Px gave up on waiting for root file system device. Including the following line:

/dev/mapper/pve-root...

If you want to you can have a look at that tell me if I overlooked something. Once again thank you for your help. I am still quite new to linux so this is very useful lessons learned.
 
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