Hi all, i'm making this topic because i'm having a kernel panic.
I unknowingly used to software updater and installed everything available to update.
This failed with an error that a package had failed installing or unpacking.
I've looked at the other similar topics and, tried the devs fix,
Next i tried booting into 6.17.0-40-generic and that worked as intended.
But how can i set the 6.17 kernel to the default one to boot instead of 7.00?
i tried
sudo nano /etc/default/grub
Change GRUB_DEFAULT=0 to GRUB_DEFAULT=saved
Hit enter to drop down a line.
Add GRUB_SAVEDEFAULT=true
ctrl+x to exit, then the y key to say yes to save, then the enter key to save as current configuration.
Run
sudo update-grub
but it still boots into the broken kernel every time i choose to start zorin os.
Do you have a Dualboot with another Linux Distribution and do you use the boot menu of the other distribution to launch Zorin? If yes, set Zorin/Ubuntu at first boot position and try then to boot Zorin.
Or do you have installed another special kernel, e.g. an oem kernel?
Hi, i tried that after searching the forums but it doesn't work for me.
after booting into 6.17, the next time i boot it's still going default for 7.0
Hi i tried the GRUB_DEFAULT and GRUB_SAVEDEFAULT thing before, and while it shows a * next to 6.17 it still loads 7.0 when i just choose zorin os in the boot menu.
is there a way i can set the first boot menu option to 6.17?
I dont have dual boot with another linux, just windows for when i need it.
Okay, it should make no difference, but you can try to set in your grub file
GRUB_DEFAULT="Advanced options for Zorin OS>Zorin OS, with Linux 6.17.0-40-generic"
(keep all other lines as they are), save the file and then run
sudo update-grub
and reboot to see if it helps. Do nothing in grub menu, just wait until the system boots.
The method "[HOW-TO] set an older kernel to default boot" actually sets the 6.17 kernel at first position at boot (when everything is made correctly), but it can give situations, where other circumstances lead to boot another kernel than the saved one in grub (Dual-boot, other boot menus, configuration files at /etc/grub.d or /etc/default/grub.d....)
DKMS make.log for virtualbox-7.1.16 for kernel 7.0.0-28-generic (x86_64)
ma 27 jul 2026 15:43:52 CEST
make: Entering directory '/usr/src/linux-headers-7.0.0-28-generic'
make[1]: Entering directory '/var/lib/dkms/virtualbox/7.1.16/build'
warning: the compiler differs from the one used to build the kernel
The kernel was built by: x86_64-linux-gnu-gcc-13 (Ubuntu 13.3.0-6ubuntu2~24.04.1) 13.3.0
You are using: gcc-13 (Ubuntu 13.3.0-6ubuntu2~24.04.1) 13.3.0
warning: pahole version differs from the one used to build the kernel
The kernel was built with: 125
You are using: 0
CC [M] vboxdrv/linux/SUPDrv-linux.o
CC [M] vboxdrv/SUPDrv.o
CC [M] vboxdrv/SUPDrvGip.o
CC [M] vboxdrv/SUPDrvSem.o
CC [M] vboxdrv/SUPDrvTracer.o
CC [M] vboxdrv/SUPLibAll.o
CC [M] vboxdrv/common/string/strformatrt.o
CC [M] vboxdrv/combined-agnostic1.o
CC [M] vboxdrv/combined-agnostic2.o
CC [M] vboxdrv/combined-os-specific.o
LD [M] vboxdrv/vboxdrv.o
CC [M] vboxnetflt/linux/VBoxNetFlt-linux.o
CC [M] vboxnetflt/VBoxNetFlt.o
CC [M] vboxnetflt/SUPR0IdcClient.o
CC [M] vboxnetflt/SUPR0IdcClientComponent.o
CC [M] vboxnetflt/linux/SUPR0IdcClient-linux.o
LD [M] vboxnetflt/vboxnetflt.o
CC [M] vboxnetadp/linux/VBoxNetAdp-linux.o
CC [M] vboxnetadp/VBoxNetAdp.o
LD [M] vboxnetadp/vboxnetadp.o
MODPOST Module.symvers
ERROR: modpost: module vboxdrv uses symbol cr4_update_irqsoff from namespace module:kvm,kvm-amd,kvm-intel, but does not import it.
ERROR: modpost: module vboxdrv uses symbol cr4_read_shadow from namespace module:kvm,kvm-amd,kvm-intel, but does not import it.
make[3]: *** [/usr/src/linux-headers-7.0.0-28-generic/scripts/Makefile.modpost:147: Module.symvers] Error 1
make[2]: *** [/usr/src/linux-headers-7.0.0-28-generic/Makefile:2065: modpost] Error 2
make[1]: *** [/usr/src/linux-headers-7.0.0-28-generic/Makefile:248: __sub-make] Error 2
make[1]: Leaving directory '/var/lib/dkms/virtualbox/7.1.16/build'
make: *** [Makefile:248: __sub-make] Error 2
make: Leaving directory '/usr/src/linux-headers-7.0.0-28-generic'
Hi, yes i used Grub Customizer yesterday about 30 minutes after Ponce-De-Leon made his comment at 19:25 yesterday. but this didnt made any difference also.
Whatever caused my problem, it wasn't caused by grub customizer.
.script_sources.txt is empty, it's 0 bytes.
/etc/default/grub
Summary
If you change this file, run 'update-grub' afterwards to update
/boot/grub/grub.cfg.
For full documentation of the options in this file, see:
info -f grub -n 'Simple configuration'
GRUB_DEFAULT="Advanced options for Zorin OS>Zorin OS, with Linux 6.17.0-40-generic"
GRUB_SAVEDEFAULT=saved
GRUB_TIMEOUT_STYLE="menu"
GRUB_TIMEOUT="10"
GRUB_DISTRIBUTOR="( . /etc/os-release; echo ${NAME:-Ubuntu} ) 2>/dev/null || echo Ubuntu"
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"
GRUB_CMDLINE_LINUX=""
If your computer has multiple operating systems installed, then you
probably want to run os-prober. However, if your computer is a host
for guest OSes installed via LVM or raw disk devices, running
os-prober can cause damage to those guest OSes as it mounts
filesystems to look for things.
GRUB_DEFAULT="Advanced options for Zorin OS>Zorin OS, with Linux 6.17.0-40-genericGRUB_DISABLE_OS_PROBER=false"
Uncomment to enable BadRAM filtering, modify to suit your needs
This works with Linux (no patch required) and with any kernel that obtains
the memory map information from GRUB (GNU Mach, kernel of FreeBSD ...)
