Hey, 

Just want to register I've suffered from the same bug. After latest update, 
got stuck on a single cursor on top of a black screen right before the GUI 
login box.
*Got around it by rolling back all the way to kernel 4.19.107-1.* Did it by 
editing xen.cfg and setting default.

I've been running kernel-latest very steadily for the past few months, and 
Qubes for almost 2 years now. This was the first time I got a bad update. I 
had even GPU IOMMU enabled with success. 
I've share my HCL here before, I run a very well supported Dell Latitude 
e5470 6th gen quad core 16GB ram.

Hope to hear from Qubes team when it's safe again to go back to newer 
kernels.

Rafael
Em quarta-feira, 29 de julho de 2020 às 16:44:11 UTC-3, [email protected] 
escreveu:

> On 7/26/20 12:56 PM, Frédéric Pierret wrote:
> > 
> > 
> > On 2020-07-26 12:50, qubes via qubes-users wrote:
> >> On 6/27/20 6:55 AM, qubes via qubes-users wrote:
> >>> On 6/26/20 10:14 PM, Qubes wrote:
> >>>> On 6/26/20 9:49 PM, qubes via qubes-users wrote:
> >>>>> On 6/13/20 5:36 PM, pudding wrote:
> >>>>>> I updated dom0 from the security-testing repo today due to the new 
> CPU
> >>>>>> hardware bug. After finishing update and rebooting my laptop, it is
> >>>>>> stuck on the black screen forever, and will not load the LUKS 
> decryption
> >>>>>> screen.
> >>>>>> ..
> >>>>>
> >>>>> Same problem on Lenovo t460 but "standard" repo/update.
> >>>>>
> >>>>>
> >>>>>
> >>>> That is a real problem. I guess it is game over without a backup.
> >>>>
> >>>
> >>> As pudding said, you can boot the old kernel, thank spaghettimonster.
> >>> But what is the real cause of the problem?
> >>> Can I do something about it or will the next Dom0-Update fix this
> >>> problem? Shall I reinstall the .125-Kernel?
> >>> Or - worst case scenario - will newer kernels stop working on this
> >>> laptop in the future anyway?
> >>
> >>
> >> The newest kernel (128) won't boot neither.... :-(
> >> So I am still using 4.19.107.
> >> But on next update I will be out. (unless I can "preserve" the old 
> kernel)
> >>
> > 
> > In dom0, edit /etc/dnf/dnf.conf and change install_limit=3 to higher 
> number to keep more kernel versions installed. Have you tried also 
> kernel-latest? It's 5.7.X version.
> > 
>
> Thanks for the advice. Or simply I don't do an update :-)
>
> > You say that you have black screen since kernel 4.19.125?
>
> True. Just a blinking cursor.
>
>
>
>
>
>

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