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Linux installation on HP EliteBook 735 G5 impossible (?)

HP EliteBook 735 G5
Linux

Hello,

 

I was hoping someone with more HP expertise may know a solution, or at least have some ideas. The issue is as follows:

 

I bought a HP EliteBook 735 G5 with Ryzen and Vega graphics. It (CPU/GPU) is supposedly supported by the linux kernel.

 

The notebook came with Win10 preinstalled, which isn't that bad. However, I work mostly with Linux servers and web applications/development/clusters operating under Linux. Having a Linux machine at the ready is a big help. And so I thought I would boot up a liveCD of some distro and see how the drivers are handled and if it is at all possible to use AMD with Linux nowadays.

 

The thing is: no distro has booted up. Either the screen goes blank (pure black, no reponse for CTRL-ALT-DELETE) or it shows a kernel panic.

 

This happens while booting either a liveCD or a setup application. The furthest I can get is the boot menu (either GRUB or UEFI systemd boot I think it's called). After making any choice the kernel crashes and either I only see a black screen or sometimes (can't really predict which power cycle) I see kernel panic.

 

I have tried:

- Disabling secure boot

- UEFI boot

- CSM boot

- Disabling Fast Boot

- Disabling all onboard devices

 

And launching distros:

- Ubuntu

- Kubuntu

- Arch

- Manjaro

- Fedora

 

I have found some indications that IOMMU might be the culprit on Ryzen-Linux builds, however I don't seem to be able to change anything about it in Setup Menu.

 

Has anyone tried and succeeded? I have the latest firmware update (7/29?).

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