On Tue 07 Jul 2020 at 17:55:34 (-0400), Borden Rhodes wrote: > >> It would help if you said which version of Debian you're using. > > > >And which boot parameter. > > Debian Bullseye. I want to add pci=nomsi to the boot parameters to > troubleshoot a USB 3 issue. > > https://wiki.debian.org/Grub#Configuring_GRUB_v2 says that > /etc/default/grub ought to exist, if it doesn't should the wiki be > updated?
The obvious way in which to lack /etc/default/grub is either by . deleting the file, intentionally or otherwise, or . avoiding installing Grub with the Debian installer. Some people do the latter deliberately, to avoid interfering with a preexisting MBR. However, you can still install the Grub packages by only cancelling when the d-i asks for which disk to use. (I suppose to be safe, one should insert a USB stick so that Grub has to make a choice.) The actual package which creates /etc/default/grub in the d-i is one of grub-pc and the packages it conflicts with, viz: grub (<< 0.97-54), grub-coreboot, grub-efi-amd64, grub-efi-ia32, grub-ieee1275, grub-legacy, grub-xen To find out which, either look at dpkg -l or type $ grep -B2 'Creating config file /etc/def' /var/log/installer/syslog if you're a member of group adm. The file originates in grub2-common as /usr/share/grub/default/grub but can be altered in grub-< … >'s postinst script. Of course, some of the above might be different on an upgraded system, which you can see mentioned in that script. Cheers, David.
