Re: clean Bullseye install, display disappears after "loading initial ramdisk"
On Fri, Nov 5, 2021 at 5:18 PM The Wanderer <wanderer@fastmail.fm> wrote:
>
> (Is there a reason why the line after the quote and before your new
> text, in both cases where that happened, consisted of a string of 11 tab
> characters instead of being empty? I had to delete the tabs manually in
> order to avoid having it mess up quoting in this reply.)
>
> On 2021-11-05 at 19:03, Felix Miata wrote:
>
> > The Wanderer composed on 2021-11-05 18:25 (UTC-0400):
> >
> >> There's a specific kernel-command-line parameter (on top of
> >> 'nomodeset') for disabling KMS with certain types of Intel
> >> integrated GPU; I don't remember it off the top of my head, but I
> >> believe it involves the string 'i915'.
> >
> > Nomodeset disables KMS for all graphics hardware.
>
> While I have no reason to doubt this statement, it doesn't seem to
> entirely line up with what I've observed in the real world.
>
> I've encountered cases where specifying just 'nomodeset' didn't make the
> system stop attempting to switch to a more-advanced display mode (and go
> blank, losing the ability to display at all), but specifying both that
> and 'i915.whateveritwas' did.
>
> (With exactly the same live-boot image, on different hardware,
> specifying just 'nomodeset' worked just fine. So it wasn't something odd
> about the boot environment, or at least not exclusively so.)
>
> >> Disabling kernel modesetting isn't the greatest thing for long-term
> >> use, but if it can let you boot, you may be able to use that as a
> >> basis for figuring out what other solutions may be possible.
> >
> > Nomodeset is primarily intended to be a troubleshooting parameter.
> > KMS, which nomodeset disables, is an absolute requirement for
> > competent graphics performance from al FOSS drivers supporting AMD,
> > Intel and NVidia GPUs, among others.
>
> I figured it'd be something like that, but didn't have the
> (sufficiently-recent) direct experience to be able to say for sure.
>
> --
> 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
Thank you. I'd completely forgotten about "nomodeset" although I've
had occasion to use it before. Did the job!
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