Recently hit this myself on dell laptop with Core i7 8850H CPU and some users reporting hang as well. the issue manifests as black screen with single blinking underscore at top-left corner instead of grub screen as grub fails to initialize. our installcd is affected, so users forced to use alternative media to install gentoo. grub 2.04_rc1 is fine as it already contains the patch. upstream patch is here https://git.savannah.gnu.org/cgit/grub.git/commit/?id=446794de8da4329ea532cbee4ca877bcafd0e534 at this moment I can't open above link, here is an alternative https://salsa.debian.org/grub-team/grub/blob/master/debian/patches/tsc_efi_default_to_pmtimer.patch
The bug has been closed via the following commit(s): https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=cc7c5c7c914a5a240a3f15788ad125c58ab7271c commit cc7c5c7c914a5a240a3f15788ad125c58ab7271c Author: Mike Gilbert <floppym@gentoo.org> AuthorDate: 2019-06-24 18:34:16 +0000 Commit: Mike Gilbert <floppym@gentoo.org> CommitDate: 2019-06-24 18:34:16 +0000 sys-boot/grub: backport fix for efi Closes: https://bugs.gentoo.org/688622 Package-Manager: Portage-2.3.67_p12, Repoman-2.3.14_p7 Signed-off-by: Mike Gilbert <floppym@gentoo.org> sys-boot/grub/files/2.02-efi-tsc-pmtimer.patch | 32 ++++++++++++++++++++++ .../{grub-2.02-r3.ebuild => grub-2.02-r4.ebuild} | 1 + 2 files changed, 33 insertions(+)
