Proxmox 9 Kernel and Ubuntu 25.04?

[SInisterPisces]

Hello,

Linux kernel 6.12 was announced to be 2024's LTS kernel this week; that got me thinking about this.

I just wanted to to check and see if I actually understand how Proxmox integrates Linux kernels now, as I used to be pretty confused about it. I think PVE major releases are tied to Ubuntu kernel releases, so I think it'll be based on the Ubuntu 25.04 kernel (6.14, see: https://www.phoronix.com/news/Ubuntu-25.04-Early-Plans ). Is that correct?

 

[Freeben]

Proxmox is based on Debian (Proxmox 8 is based on Debian 12)

Debian 13 should be released this year, and will use kernel 6.12 LTS. I expect Proxmox 9 to be based on Debian 13.

 

[BobhWasatch]

User space will likely be based on Debian 13 but they use Ubuntu kernels because Debian doesn't integrate ZFS.

 

[SInisterPisces]

See: https://pve.proxmox.com/wiki/Proxmox_VE_Kernel

@Freeben As @BobhWasatch notes, Proxmox's default kernel is a modified Ubuntu LTS kernel, and the Debian repositories are only used for userspace (non-kernel things you install from the repos). So, Proxmox 9 (or 8.future if things get interesting) will ship with the Ubuntu 25.04 kernel, kernel 6.14, and will only jump to a newer major kernel version (6.15, etc.) if/when Ubuntu 25.04 does.

The experimental kernel, I believe, tracks Ubuntu's non-LTS releases.

 

[gurubert]

proxmox-kernel-6.14 ist already available for Proxmox 8.4

 

[SInisterPisces]

proxmox-kernel-6.14 ist already available for Proxmox 8.4

Yes. It's currently in testing. It's optional.

The default kernel tracks the latest Ubuntu LTS. When Ubuntu 25.04 comes out, that will be 6.14.

 

[luckman212]

How are people doing with this 6.14 kernel in May 2025? I'm tempted to try it, but seems like it might be a bit of a rough ride still.

 

[TErxleben]

You're using a very reliable package from one vendor and want to tweak the kernel as well? How does that come about? Pure playfulness? Too much time? Are you a kernel junkie? I'm asking for a friend.

 

[luckman212]

Not sure if that question was towards me, but the reason for me wanting to try newer kernels is because of this issue I'm having.