# Fatal glibc error: CPU does not support x86-64-v2 **URL:** \ **Category:** Rocky Linux Help & Support\ **Created:** [May 29, 2024, 6:08am UTC](https://forums.rockylinux.org/t/fatal-glibc-error-cpu-does-not-support-x86-64-v2/14307 "2024-05-29T06:08:18Z")\ **Posts on this page:** 12\ **Page:** 1
**Author:** ![hakhosh](https://avatars.discourse-cdn.com/v4/letter/h/848f3c/32.png) [@hakhosh](https://forums.rockylinux.org/u/hakhosh)\ **Post date:** [May 29, 2024, 6:08am UTC](https://forums.rockylinux.org/t/fatal-glibc-error-cpu-does-not-support-x86-64-v2/14307/1 "2024-05-29T06:08:19Z")
I have received this error on VCenter 7, how can I fix it? Fatal glibc error: CPU does not support x86-64-v2 ---
**Author:** ![label](https://avatars.discourse-cdn.com/v4/letter/l/c5a1d2/32.png) [@label](https://forums.rockylinux.org/u/label)\ **Post date:** [May 29, 2024, 6:10am UTC](https://forums.rockylinux.org/t/fatal-glibc-error-cpu-does-not-support-x86-64-v2/14307/2 "2024-05-29T06:10:04Z")
It’s exactly as it sounds. CPU does not support x86-64-v2. You need to ensure your host CPU supports x86-64-v2 _and_ you need to ensure that your VM settings provide a CPU with the correct extensions. ---
**Author:** ![jlehtone](https://avatars.discourse-cdn.com/v4/letter/j/e9a140/32.png) [@jlehtone](https://forums.rockylinux.org/u/jlehtone)\ **Post date:** [May 29, 2024, 6:28am UTC](https://forums.rockylinux.org/t/fatal-glibc-error-cpu-does-not-support-x86-64-v2/14307/3 "2024-05-29T06:28:04Z")
The need for > [@hakhosh](#): > > x86-64-v2 is explained in [Building Red Hat Enterprise Linux 9 for the x86-64-v2 microarchitecture level | Red Hat Developer](https://developers.redhat.com/blog/2021/01/05/building-red-hat-enterprise-linux-9-for-the-x86-64-v2-microarchitecture-level) and discussed in [El9 will require x86-64-v2 support](https://forums.rockylinux.org/t/el9-will-require-x86-64-v2-support/5311) ---
**Author:** ![hakhosh](https://avatars.discourse-cdn.com/v4/letter/h/848f3c/32.png) [@hakhosh](https://forums.rockylinux.org/u/hakhosh)\ **Post date:** [May 29, 2024, 6:41am UTC](https://forums.rockylinux.org/t/fatal-glibc-error-cpu-does-not-support-x86-64-v2/14307/4 "2024-05-29T06:41:24Z")
cpu model : intel xeon 5218 gold ---
**Author:** ![POSworker](https://avatars.discourse-cdn.com/v4/letter/p/8797f3/32.png) [@POSworker](https://forums.rockylinux.org/u/POSworker)\ **Post date:** [May 29, 2024, 11:23am UTC](https://forums.rockylinux.org/t/fatal-glibc-error-cpu-does-not-support-x86-64-v2/14307/5 "2024-05-29T11:23:18Z")
better list info from `lscpu` you can also look if your cpu supports this set of instructions [cpu architecture - How do I check if my CPU supports x86-64-v2? - Unix & Linux Stack Exchange](https://unix.stackexchange.com/questions/631217/how-do-i-check-if-my-cpu-supports-x86-64-v2) ---
**Author:** ![jlehtone](https://avatars.discourse-cdn.com/v4/letter/j/e9a140/32.png) [@jlehtone](https://forums.rockylinux.org/u/jlehtone)\ **Post date:** [May 29, 2024, 12:04pm UTC](https://forums.rockylinux.org/t/fatal-glibc-error-cpu-does-not-support-x86-64-v2/14307/6 "2024-05-29T12:04:44Z")
> [@hakhosh](#): > > cpu model : intel xeon 5218 gold > [@hakhosh](#): > > VCenter 7 What is vcenter? A hypervisor? Is the error from Rocky 9 installer when about to install a VM? The xeon 5218 gold ought to support the required instructions, but if the vcenter is a hypervisor, does it pass all of them to the VM? ---
**Author:** ![hakhosh](https://avatars.discourse-cdn.com/v4/letter/h/848f3c/32.png) [@hakhosh](https://forums.rockylinux.org/u/hakhosh)\ **Post date:** [May 29, 2024, 12:29pm UTC](https://forums.rockylinux.org/t/fatal-glibc-error-cpu-does-not-support-x86-64-v2/14307/7 "2024-05-29T12:29:45Z")
Vcenter 7.0.3 Esxi 7.0.3 Yes Yes, I get the error from the beginning of the installation در تاریخ چهارشنبه ۲۹ مه ۲۰۲۴، ۱۵:۴۴ Jukka V. Lehtonen via Rocky Linux Forum \<[notifications@rockylinux.discoursemail.com](mailto:notifications@rockylinux.discoursemail.com)\> نوشت: ---
**Author:** ![iwalker](https://sea2.discourse-cdn.com/flex020/user_avatar/forums.rockylinux.org/iwalker/32/2599_2.png) [@iwalker](https://forums.rockylinux.org/u/iwalker)\ **Post date:** [May 29, 2024, 2:26pm UTC](https://forums.rockylinux.org/t/fatal-glibc-error-cpu-does-not-support-x86-64-v2/14307/8 "2024-05-29T14:26:13Z")
Check your EVC profile in VCenter since you probably have it set too low for a CPU that doesn’t support x86\_64-v2. Usually EVC profiles are used for multiple servers that have varying levels of hardware versions and the EVC profile then treats all the servers at the same CPU level thus allowing machines to be live migrated to any one of the machines in the VMware Cluster. [https://www.reddit.com/r/RockyLinux/comments/119nwtn/x86\_64v2\_not\_detected\_on\_vmware\_intel\_haswell/](https://www.reddit.com/r/RockyLinux/comments/119nwtn/x86_64v2_not_detected_on_vmware_intel_haswell/) ---
**Author:** ![hakhosh](https://avatars.discourse-cdn.com/v4/letter/h/848f3c/32.png) [@hakhosh](https://forums.rockylinux.org/u/hakhosh)\ **Post date:** [May 30, 2024, 4:45am UTC](https://forums.rockylinux.org/t/fatal-glibc-error-cpu-does-not-support-x86-64-v2/14307/9 "2024-05-30T04:45:44Z")
What mode should I put evc mode on now? Intel® “Merom” Generation ---
**Author:** ![iwalker](https://sea2.discourse-cdn.com/flex020/user_avatar/forums.rockylinux.org/iwalker/32/2599_2.png) [@iwalker](https://forums.rockylinux.org/u/iwalker)\ **Post date:** [May 30, 2024, 12:19pm UTC](https://forums.rockylinux.org/t/fatal-glibc-error-cpu-does-not-support-x86-64-v2/14307/10 "2024-05-30T12:19:31Z")
> [@hakhosh](#): > > Intel® “Merom” Generation Well since merom is Core 2 Duo, then that is like a CPU from 2006-2008. I think you need something at least Haswell or higher (Skylake). [List of Intel CPU microarchitectures - Wikipedia](https://en.wikipedia.org/wiki/List_of_Intel_CPU_microarchitectures#:~:text=Broadwell%3A%2014%20nm%20derivative%20of,microarchitecture%2C%20released%20in%20September%202014). ---
**Author:** ![jlehtone](https://avatars.discourse-cdn.com/v4/letter/j/e9a140/32.png) [@jlehtone](https://forums.rockylinux.org/u/jlehtone)\ **Post date:** [May 30, 2024, 12:56pm UTC](https://forums.rockylinux.org/t/fatal-glibc-error-cpu-does-not-support-x86-64-v2/14307/11 "2024-05-30T12:56:48Z")
Wikipedia lists for x86-64-v2: - Intel [Nehalem](https://en.wikipedia.org/wiki/Nehalem_(microarchitecture)) and newer Intel “big” cores - Intel (Atom) [Silvermont](https://en.wikipedia.org/wiki/Silvermont) and newer Intel “small” cores - AMD [Bulldozer](https://en.wikipedia.org/wiki/Bulldozer_(microarchitecture)) and newer AMD “big” cores - AMD [Jaguar](https://en.wikipedia.org/wiki/Jaguar_(microarchitecture)) - [VIA](https://en.wikipedia.org/wiki/VIA_Technologies) Nano and Eden “C” * * * I’d say: pick “latest and greatest” that _all_ your baremetal servers support. (One is not likely to add something lesser/older and then migrate to it, is one?) ---
**Author:** ![system](https://us1.discourse-cdn.com/flex020/uploads/rockylinux/original/1X/91b7219eec10e30013422e4df76c1d898711a5d5.svg) [@system](https://forums.rockylinux.org/u/system)\ **Post date:** [July 29, 2024, 12:57pm UTC](https://forums.rockylinux.org/t/fatal-glibc-error-cpu-does-not-support-x86-64-v2/14307/12 "2024-07-29T12:57:37Z")
Closed on July 29, 2024, 12:57pm UTC This topic was automatically closed 60 days after the last reply. New replies are no longer allowed.