FYI: Potential hang/lockup when installing

[xrobau]

TL;DR: If your machine is hanging on install, disable VT-d in the BIOS

As I'm trialing Proxmox, I'm installing it on three machines. One (luckily for me, the first) installed without a problem, I managed to get it all set up, and it worked fine. I then decomissioned two older vmware machines and tried to install proxmox on them. Both of them hung on install, and at slightly different times, and it *hard hung* - the mouse in the installer GUI wouldn't move or anything!

Both were up to date with all firmware settings, etc, the normal things.

After trying a couple of times, I switched to the text console after starting the install, and saw a bunch of errors like

DMAR: ERROR: DMA PTE for vPFN xxxxxx already set (to yyyyyy not yyyyyy)

This lead me to a (as yet unmerged) kernel patch documented on launchpad: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1970453

I confirmed that I was able to repeatedly replicate it by simply cat /dev/zero > /dev/sda, and then turned off VT-d in the bios. Instant fix!

So if people are having strange issues where their machines are hard-freezing, give it a shot!

 

[leesteken]

If I remember correctly, IOMMU was enabled by default for Intel in the kernel version of the installer. Later, this was reverted because it caused problems on older machines. Adding intel_iommu=off to the kernel parameters will also help, but disabling IOMMU (VT-d) in BIOS is indeed a work-around. I expect this to be fixed for the next installer (as it is fixed for newer kernel versions).

 

[xrobau]

Bump, this is still broken in the current installer, more than a month later.

 

[Zippi]

Bump, this is still broken in the current installer, more than a month later.

Bump, this is still broken in the current installer 7.3.3
Well, i can boot and the HP ProLiant MicroServer Gen 8 works but there are still:

dmar error dma pte for vPFN already set bla bla bla..........

 

[muelhaupt_it]

Bump, this is still broken in the current installer 8.2.1
How could I help fixing this?

 

[idoc]

disable VT-d

Bump, this is still broken in the current installer 7.3.3
Well, i can boot and the HP ProLiant MicroServer Gen 8 works but there are still:

dmar error dma pte for vPFN already set bla bla bla..........

disable VT-d

 

[TheBreenis]

This is still a problem. Hopefully one day the installer will account for this and disabling VT-d won't be needed.