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To be more precise, nomodeset and mgag200.modeset=0 are for solving video sync on physical VGA display. I've done a lot of test + reboot using iDRAC distant display and I've seen lately that physical video was not working when iDRAC video was ok thank's to pci=realloc=off kernel's parameter. So...

@t.lamprecht : @gera9010 : Hi everyone, Dell ask me for doing live test on our R7525 to see by themselves the issue, and they've seen the issue (no video on Ubuntu Server LTS 20.04 installer) so... they now searching some R7525 in their labs to reproduce the issue again... time's running and...

Dell support is working on it. ProxmoxVE is not supported by Dell but chance is that Ubuntu 20 and 21 installer are affected too !

I think that PVE installer continues to run after video freeze. If I remember well, PVE installer ask to select which network card we wanna use (had 4 network cards on that server), so it maybe not start by doing DHCP request before that, and I cannot see any screen to be able to select any NIC...

Here is how use SysRescueCD's kernel instead of ProxmoxVE's one and recover display output: -Plug SysRescueCD v8.0.3 USB key in the R7525 server (UEFI mode, Secureboot disabled) and start it (press F11 to select boot device) -At grub stage, press "e" to edit boot script, add "init=/bin/sh" at...

@t.lamprecht : Hi Thomas, issue specific to vendor... Not really, how can you explain that some kernels (CentOS, SysRescueCD) are running just fine ? The problem appears as soon as kernel's starting, there is no kernel output even by removing "quiet" kernel option, we are far far away from x11...

...and still have this message "[drm] *ERROR* can't reserve VRAM" from mgag200 module in dmesg.

@t.lamprecht : Next Proxmox 7.2 (kernel 5.15) doesn't solve the issue, still have no video on DELL R7525.

@Stoiko Ivanov : -Install Proxmox from a Debian 11 Bullseye install is not possible because Debian 11 has the same issue.

@Stoiko Ivanov : -Editing grub kernel parameters (remove quiet) does not work because video output stops as soon as kernel is starting. -I've tried Proxmox 6 too and had the same issue, no video as soon as the kernel is running. Regards, Herve

Same issue here, but you're wrong, the server doesn't freeze, the installer process seems running but without video output (neither on iDRAC) so you can't go further and terminate the installation. We have many DELL server here, Dell R440 and that new R7525, both have Matrox G200 VGA card. There...