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system won't boot into the kernel specfied in /boot

gb flag
Ricky Robinson

On a machine with uEFI boot and ubuntu 21.04, I have a few kernels installed. I noticed that the system doesn't boot automatically into the kernel defined by the links in /boot (initrd.img -> initrd.img-5.11.0-25-generic vmlinuz -> vmlinuz-5.11.0-25-generic) :

$ ll /boot/
total 222012
drwxr-xr-x  5 root root     4096 Sep 20 11:47 ./
drwxr-xr-x 21 root root     4096 Sep 19 15:45 ../
-rw-r--r--  1 root root   251649 Aug 18 11:23 config-5.10.0-1045-oem
-rw-r--r--  1 root root   253156 Jul  9 19:42 config-5.11.0-25-generic
-rw-r--r--  1 root root   253064 Aug 26 20:11 config-5.11.0-34-generic
drwxr-xr-x  3 root root     4096 Jan  1  1970 efi/
drwxr-xr-x  4 root root     4096 Sep 20 11:47 grub/
drwxr-xr-x  5 root root     4096 Sep 19 20:51 grub.bak/
lrwxrwxrwx  1 root root       28 Sep 20 11:47 initrd.img -> initrd.img-5.11.0-25-generic
-rw-r--r--  1 root root 60355963 Sep 20 11:34 initrd.img-5.10.0-1045-oem
-rw-r--r--  1 root root 39082577 Sep 20 11:43 initrd.img-5.11.0-25-generic
-rw-r--r--  1 root root 66756367 Sep 20 11:43 initrd.img-5.11.0-34-generic
lrwxrwxrwx  1 root root       28 Sep 20 11:47 initrd.img.old -> initrd.img-5.11.0-34-generic
-rw-r--r--  1 root root   182704 Aug 18  2020 memtest86+.bin
-rw-r--r--  1 root root   184380 Aug 18  2020 memtest86+.elf
-rw-r--r--  1 root root   184884 Aug 18  2020 memtest86+_multiboot.bin
-rw-------  1 root root  5800305 Aug 18 11:23 System.map-5.10.0-1045-oem
-rw-------  1 root root  5970185 Jul  9 19:42 System.map-5.11.0-25-generic
-rw-------  1 root root  5973530 Aug 26 20:11 System.map-5.11.0-34-generic
lrwxrwxrwx  1 root root       25 Sep 20 11:47 vmlinuz -> vmlinuz-5.11.0-25-generic
-rw-------  1 root root 12542656 Aug 18 11:56 vmlinuz-5.10.0-1045-oem
-rw-------  1 root root 14740480 Jul  9 20:04 vmlinuz-5.11.0-25-generic
-rw-------  1 root root 14752320 Aug 26 20:29 vmlinuz-5.11.0-34-generic
lrwxrwxrwx  1 root root       25 Sep 20 11:47 vmlinuz.old -> vmlinuz-5.11.0-34-generic

It boots into:

$ uname -a
Linux work 5.10.0-1045-oem #47-Ubuntu SMP Wed Aug 18 10:41:03 UTC 2021 x86_64 x86_64 x86_64 GNU/Linux

Now, from the GRUB menu, I can select any kernel just fine. What's happening to the automatic selection? Where else should I look?

Thanks!

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bitdruid avatar
lk flag
bitdruid
am i getting this wrong or wouldn't it just solve your problem if you define the GRUB_DEFAULT= entry ?
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