We are working on Debian 10 OS version and Intel Xeon-2775TE HW model platform. We found a grub issue that grub menu will be stuck with a 1/200 ratio in AC power on/off stress test. After multiple validation and we co-worked with Intel, we found the root cause is unreliable "rdtsc" instruction usage.
And I already raised a bug with url: https://savannah.gnu.org/bugs/index.php?66257 and attached related fix patch both to bug ticket and this mail's attachment. In patch, I did a detailed explanation and some information from Intel's expert. We are eager to merge this fix with grub so that all GNU grub users will meet this issue any more. If there is any problem, please let us know by mail or bug ticket.
We are all looking forward to your feedback!
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