On Fri, Nov 5, 2021 at 4:25 PM The Wanderer <wande...@fastmail.fm> wrote:
> On 2021-11-05 at 18:14, Mark Copper wrote: > > > Where to start diagnosing a problem like this? > > At first blush: look into ways to disable kernel modesetting. > > The details tend to vary depending on the GPU involved, but one thing > they usually have in common is adding 'nomodeset' to the kernel command > line. > > I think I usually see the changeover to KMS happening later than the > point right after "loading initial ramdisk", but there's no guarantee > that that will always be the case, and the symptom seems right. > > > Minimal install -- no desktop. > > > > No "oops" in syslog though there are some warnings. > > > > System seems to shut down properly when power button pressed. > > Yesterday I could even ssh in, but that facility disappeared. > > Shut down immediately (hard-power-off style, much like you get when > pressing that button during POST), or initiate shutdown and complete > after the normal amount of shutdown time (as you get when initiating a > shutdown command from the software UI within the booted OS)? > > The answer should help us tell how far it had managed to boot before the > power-button press happened. > > > Asrock H570M-ITX/ac with Intel i3-10100. More info gladly provided. > > 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'. If you're using such a GPU, it might be worth looking into that. > > 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. > > Regarding longer-term use, I bumped into this discussion this morning which might be helpful: https://forums.linuxmint.com/viewtopic.php?t=345452
