With kernel 5.5.17-1~bpo10+1 on buster I can boot fine. But not with 5.6.
With a debian dist-upgrade, I got a new kernel 5.6. But the PC does not boot any more I get stuck on a black screen, without any text shown.
In rescue mode, I can see the text. It mainly mentions some usb stuff. By the way I am booting on a USB drive.
At the end I get this warning
ACPI Warning: \_SB.PCI0.PEG0.PEGP._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20180313/nsarguments-66)
and then an extra line that says "failed to evaluate _DSM". And the same error line contains "_SB.PCI0.PEG0.PEGP._DSM".
and the last line says "switching to nouveau [...]"
My computer has an NVIDIA GPU.
I searched and I could not find a fix. Help would be appreciated.
I found this similar issue:
viewtopic.php?f=6&t=137096
Note I have XFCE and no gnome was installed from the debian installer.
Note: The debian installer allows to have backports sources to download. ANd I have kept the apt config from the installer. So I installed a kernel linux-image-amd64 from buster-backports. And then it got upgraaded automatically. I know I can lock this in the preferences. But it may be interesting to try the new backported kernel when there is one. So I keep it that way.