I have Ubuntu 24.04 running on a Lenovo ThinkPad T420. This machine was setup as dual boot between Windows 10 and Ubuntu but the other day I reinstalled Ubuntu 24.04 from a flash drive. I chose the option to use the full disk for Ubuntu and wipe out any other operating systems.
The system runs fine from a cold start, and boots directly into Ubuntu 24.04. However, when Ubuntu does a Restart, either as part of an upgrade or when I choose Restart from the Shutdown menu, I get a bunch of error messages and then a menu with Ubuntu, Windows Boot Loader and other options, such as the memory test. This menu is not operative. I can move the highlight to different options but when I hit Enter none are executed. I always use the Power button to turn the machine off and then back on. At that point it boots normally into Ubuntu.
I had the same issue when the system was configured as dual boot, but I thought getting rid of Windows and having only Ubuntu on the machine would fix the problem, but it hasn't.
How is Restart different from a cold start, and why do I still have a Windows boot menu option after I told Ubuntu to overwrite the old Windows installation? How can I get rid of this "extra" Restart menu?
Thanks in advance for any help.
Update on 2/28/2025 . I've added a picture of the menu that appears after a warm boot. I can move the cursor up and down, and change menu with TAB but pressing Enter or waiting 10 seconds does not activate anything.
Based on the fact that I edited Grub to remove the Windows 10 option, this is Grub, not the EFI Boot Manager. See below for that information.
sudo efibootmgr
BootCurrent: 0019
Timeout: 0 seconds
BootOrder: 0019,000A,001A,000D,0006,0007,0008,0009,000B,000C,000E,000F,0010,0011,0012,0013
Boot0000 Setup FvFile(721c8b66-426c-4e86-8e99-3457c46ab0b9)
Boot0001 Boot Menu FvFile(126a762d-5758-4fca-8531-201a7f57f850)
Boot0002 Diagnostic Splash Screen FvFile(a7d8d9a6-6ab0-4aeb-ad9d-163e59a7a380)
Boot0003 Startup Interrupt Menu FvFile(f46ee6f4-4785-43a3-923d-7f786c3c8479)
Boot0004 ME Configuration Menu FvFile(82988420-7467-4490-9059-feb448dd1963)
Boot0005 Rescue and Recovery FvFile(665d3f60-ad3e-4cad-8e26-db46eee9f1b5)
Boot0006* USB CD VenMsg(bc7838d2-0f82-4d60-8316-c068ee79d25b,86701296aa5a7848b66cd49dd3ba6a55)
Boot0007* USB FDD VenMsg(bc7838d2-0f82-4d60-8316-c068ee79d25b,6ff015a28830b543a8b8641009461e49)
Boot0008* ATAPI CD0 VenMsg(bc7838d2-0f82-4d60-8316-c068ee79d25b,aea2090adfde214e8b3a5e471856a35401)
Boot0009* ATA HDD2 VenMsg(bc7838d2-0f82-4d60-8316-c068ee79d25b,91af625956449f41a7b91f4f892ab0f602)
Boot000A* ATA HDD0 VenMsg(bc7838d2-0f82-4d60-8316-c068ee79d25b,91af625956449f41a7b91f4f892ab0f600)
Boot000B* ATA HDD1 VenMsg(bc7838d2-0f82-4d60-8316-c068ee79d25b,91af625956449f41a7b91f4f892ab0f601)
Boot000C* USB HDD VenMsg(bc7838d2-0f82-4d60-8316-c068ee79d25b,33e821aaaf33bc4789bd419f88c50803)
Boot000D* PCI LAN VenMsg(bc7838d2-0f82-4d60-8316-c068ee79d25b,78a84aaf2b2afc4ea79cf5cc8f3d3803)
Boot000E* ATAPI CD1 VenMsg(bc7838d2-0f82-4d60-8316-c068ee79d25b,aea2090adfde214e8b3a5e471856a35403)
Boot000F* ATAPI CD2 VenMsg(bc7838d2-0f82-4d60-8316-c068ee79d25b,aea2090adfde214e8b3a5e471856a35404)
Boot0010 Other CD VenMsg(bc7838d2-0f82-4d60-8316-c068ee79d25b,aea2090adfde214e8b3a5e471856a35406)
Boot0011* ATA HDD3 VenMsg(bc7838d2-0f82-4d60-8316-c068ee79d25b,91af625956449f41a7b91f4f892ab0f603)
Boot0012* ATA HDD4 VenMsg(bc7838d2-0f82-4d60-8316-c068ee79d25b,91af625956449f41a7b91f4f892ab0f604)
Boot0013 Other HDD VenMsg(bc7838d2-0f82-4d60-8316-c068ee79d25b,91af625956449f41a7b91f4f892ab0f606)
Boot0014* IDER BOOT CDROM PciRoot(0x0)/Pci(0x16,0x2)/Ata(0,1,0)
Boot0015* IDER BOOT Floppy PciRoot(0x0)/Pci(0x16,0x2)/Ata(0,0,0)
Boot0016* ATA HDD VenMsg(bc7838d2-0f82-4d60-8316-c068ee79d25b,91af625956449f41a7b91f4f892ab0f6)
Boot0017* ATAPI CD: VenMsg(bc7838d2-0f82-4d60-8316-c068ee79d25b,aea2090adfde214e8b3a5e471856a354)
Boot0018* PCI LAN VenMsg(bc7838d2-0f82-4d60-8316-c068ee79d25b,78a84aaf2b2afc4ea79cf5cc8f3d3803)
Boot0019* Ubuntu HD(1,GPT,2cc46b1a-cc31-482d-890c-0be652fed966,0x800,0x219800)/File(\EFI\ubuntu\shimx64.efi)
Boot001A Windows Boot Manager HD(1,GPT,62a6bdd6-c675-4ed5-8938-e1ea1dece5be,0x800,0x32000)/File(\EFI\Microsoft\Boot\bootmgfw.efi)57494e444f5753000100000088000000780000004200430044004f0042004a004500430054003d007b00390064006500610038003600320063002d0035006300640064002d0034006500370030002d0061006300630031002d006600330032006200330034003400640034003700390035007d00000000000100000010000000040000007fff0400
