On 2020-12-27 at 02:51, Sven Joachim wrote: > On 2020-12-26 18:44 -0500, The Wanderer wrote: > >> On 2020-12-26 at 18:28, Felix Miata wrote: >> >>> I suggest a good place to start would be to goto >>> /etc/default/grub and switch from whichever mode is employed to >>> the other, either plain text to graphical, or vice versa, then >>> regenerate grub.cfg and try booting. >> >> That's a good suggestion, except I don't see any way to do that in >> the /etc/default/grub I have. >> >> The closest thing I see is >> >> # Uncomment to disable graphical terminal (grub-pc only) >> #GRUB_TERMINAL=console >> >> but that says it's for grub-pc only, i.e. the "legacy" version of >> grub, whereas I'm running grub2. > > No, grub-pc is not the legacy version of grub, it is grub2 for > legacy computers without EFI. The version of grub2 for modern UEFI > systems is grub-efi-amd64 which uses the framebuffer set up by the > system's firmware (hence, no traditional text mode). Ah, thanks for that correction; that does ring a bell now that you mention it. That would explain why this would be effective. I've made that change in this file; as soon as I reach a point in my operations where shutting down again is reasonable, I'll test to confirm that I can boot that way with the old GPU (and what behavior difference there may be with that change), and assuming it works will swap GPUs and see what I get. I also want to make sure I have an up-to-date rescue environment on external media, just in case I need to revert this change in order to boot my current system again. Unlikely, but better to be safe than sorry. -- The Wanderer The reasonable man adapts himself to the world; the unreasonable one persists in trying to adapt the world to himself. Therefore all progress depends on the unreasonable man. -- George Bernard Shaw
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