DMAR not present error while installaing RHELv5.11

ilavaa · 03-01-2021, 04:04 AM

Im trying to install RHEL v5.11 workstation in my HP elitebook 745G6 laptop. But im getting 'ACPI Error: DMAR not present error'. Im installaing from bootable USB with legacy mode and due to some reasons im unable to use the latest version of RHEL.

Kindly let me know how to solve this error and proceed the installation.

shruggy · 03-01-2021, 10:04 AM

Quote:

Originally Posted by ilavaa

due to some reasons im unable to use the latest version of RHEL.

Care to explain? You are trying to install an old and unsupported RHEL release on a fairly new laptop. I doubt all of the hardware released in 2020 is fully supported by RHEL5.

TB0ne · 03-04-2021, 08:13 AM

Quote:

Originally Posted by ilavaa

Im trying to install RHEL v5.11 workstation in my HP elitebook 745G6 laptop. But im getting 'ACPI Error: DMAR not present error'. Im installaing from bootable USB with legacy mode and due to some reasons im unable to use the latest version of RHEL.

Kindly let me know how to solve this error and proceed the installation.

Probably has a lot to do with the fact that RHEL 5.11 reached full end-of-life *FIVE YEARS AGO*, and was old before then too, and the very limited pay-for support ended last year.

If you're going to use Red Hat, you need to pay for it...otherwise, there's little point. CentOS 8 is a good replacement choice, but even then I'd ask WHY? Those distros are for servers, not laptops. Support for cameras/bluetooth/sound/etc., may be spotty. There is NO NEED for it...run Mint, Fedora, or Ubuntu insteadl.

Emerson · 03-04-2021, 11:30 AM

I've never understood how someone can expect a 10+ year old distro/kernel to have support for new hardware solutions which did not exist until now.

TB0ne · 03-04-2021, 12:37 PM

Quote:

Originally Posted by Emerson

I've never understood how someone can expect a 10+ year old distro/kernel to have support for new hardware solutions which did not exist until now.

Indeed...and I've never seen the point to installing RHEL/CentOS on a laptop or workstation...just no point. If you want to stay in the RHEL ecosystem, load Fedora, and 99% will be identical if you want to develop. And you won't have to spend time figuring out how to get things like your latest nVidia card with 4K monitor working correctly on a distro that is really meant to run nicely without a screen at all. Among the other 'consumer' hardware devices.