https://bugzilla.kernel.org/show_bug.cgi?id=206723
--- Comment #1 from Thomas Gleixner (t...@linutronix.de) ---
bugzilla-dae...@bugzilla.kernel.org writes:
> With Kernel <4.19.76 I can boot normally with kernel settings:
> pci=noacpi.
> Without this setting the screen stays black, so I have to use it.
Have your tried w/o that command line option? I have no idea why you
have to use it at all. My T420 just works w/o any magic tweaks.
What kind of kernel config are you using? Home brewn or some standard
distro config?
> I made a git bisect (stable branch) and found:
> b40c15c20e42491303202ae1368841704be0c3b9 is the first bad commit
This does not make any sense as this operation is undone 20 lines later
and there is absolutely no reason why this might affect your EHCI.
Did you verify by reverting that commit on top of 4.19.76?
Also please verify that the problem persists with the latest 4.19.107
kernel and the upstream 5.6-rc3/4 kernel.
Thanks,
tglx
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