Comment # 50 on bug 1185513 from Anthony Agelastos

(In reply to Joey Lee from comment #48)
> (In reply to Anthony Agelastos from comment #46)
> > (In reply to Joey Lee from comment #45)
> > > Hi Anthony and anyone's system has the same symptom:
> > > 
> > > I have reverted the 719e1f561afbe patch and built a kernel rpm in my home
> > > branch on OBS. Could you please try it?
> > > 
> > > https://build.opensuse.org/package/binaries/home:joeyli:branches:openSUSE:
> > > Factory:bsc1185513/kernel-default/standard
> > > 
> > > Please install this kernel rpm but still keep the old kernel in case there
> > > have any unknown problem.
> > > 
> > > And, please note that this is not a real solution. I will raise this issue
> > > on upstream after we confirmed that the 719e1f561afbe patch is root cause.
> > > Reverting 719e1f561afbe patch will cause that we may lost some USB4
> > > functions.
> > > 
> > > On the other hand, kernel upstream may treats this problem as a firmware
> > > issue. We didn't see this ACPI error message that's because v5.11 kernel
> > > doesn't follow ACPI spec's recommended behavior.
> > 
> > Hello Joey:
> > 
> > Thank you for your help with this. I'm glad you were able to drill down to
> > the root cause. Could you (or anyone familiar with this) walk me through the
> > steps for how to install your kernel to test and then to revert the changes
> > afterwards? One method could be manual whilst another could leverage Snapper
> > and do it through snapshots. I am new enough to openSUSE that I don't have
> > enough experience with either of those methods to know precisely how to. So,
> > any guidance would be appreciated. Thank you for your help with this. 
> > 
> 
> Normally I just download the kernel-default RPM and use 'rpm -ivh' command
> to install it on my machine. e.g.
> 
> # rpm -ivh kernel-default-5.12.6-1.1.g15ed7b8.x86_64.rpm
> 
> Then reboot system, you should see a boot item on grub2 menu. e.g.
> 
>    openSUSE Tumbleweed, with Linux 5.12.6-1.g15ed7b8-default
> 
> Then select it for booting test.
> 
> Let's test and confirm the 719e1f561afbe patch is the root cause. Then we
> ping upstream experts.

Greetings:

I installed the kernel and attached its dmesg output to this ticket. I was not
able to boot the system graphically (it stopped at the console login). I didn't
see any of the errors we saw before (but please double check me). This seems to
indicate that you have correctly identified the problem. Please let me know if
you have any questions, comments, or concerns. Additionally, please let me know
how to proceed once you discuss things with upstream. Thank you for your help
with this. 

Kind regards,
Anthony