Show pagesourceBack to top Share via Share via... Twitter LinkedIn Telegram Yammer RedditRecent ChangesSend via e-MailPrintPermalink × Table of Contents EFI EFISTUB (boot kernel directly) Arch Linux Grub2 Debian dual boot with other systems Windows Windows gets the time wrong Troubleshooting Further reading Boot Linux Boot process1: Initialization and Boot Loader Phase Kernel Phase Initial Ramdisk (initramfs) init on initramfs Loading Kernel Modules Providing Block Special Files Managing RAID and LVM Setups Managing the Network Configuration (userspace) init phase usually systemd EFI EFISTUB (boot kernel directly) Arch Linux EFISTUB Arch wiki entry efibootmgr --disk /dev/sdX --part Y --create --label "Arch Linux" --loader /vmlinuz-linux --unicode 'root=PARTUUID=XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX rw initrd=\initramfs-linux.img' --verbose if you need ucode, add it as first initramfs: … initrd=/cpu_manufacturer-ucode.img initrd=/initramfs-linux.img Grub2 Debian grub-install --target=x86_64-efi --efi-directory=/boot/efi --bootloader-id=debian --recheck update-grub dual boot with other systems Windows Windows gets the time wrong Reason: Clock is set in UTC, Windows thinks it's local time. Solution: UseUTCforRTC.reg Windows Registry Editor Version 5.00 [HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\TimeZoneInformation] "RealTimeIsUniversal"=dword:00000001 Disable Windows time service sc config w32time start= disabled See also: https://help.ubuntu.com/community/UbuntuTime#Multiple_Boot_Systems_Time_Conflicts Troubleshooting show boot options (Kernel command line) cat /proc/cmdline Further reading Introduction to the boot process (SLES 12 SP5) [1] https://documentation.suse.com/sles/12-SP5/html/SLES-all/cha-boot.html Last modified: 2023-11-22 15:31