Der X-Server konnte nicht gestartet werden

[r28]

After the installation i'm getting a bluescreen with this box:

Der X-Server (Ihre grafische Oberfläche)
konnte nicht gestartet werden. Wahrscheinlich
ist er nicht korrekt eingerichtet. Wollen Sie
die Ausgabe des X-Servers sehen, um das
Problem zu suchen?

After
sudo spkg xf86-video-intel-20201226-x86_64-1gv.txz
sudo spkg -d xf86-video-intel
I get an:
ERROR: You need root privileges to run this command. Try using --dry-run.

As root:
ERROR: Package file does not exist. (xf86-video-intel-20201226-x86_64-1gv.txz)
ERROR: Package upgrade failed!

lsblk:
sda 8:0 0 119,2G 0 disk
--sda1 8:1 0 512M 0 part /boot/efi
--sda 2 8:2 0 118.8G 0 part /
sdb 8:16 1 7.3G 0 disk
- sdb1 8:17 1 7.3G 0 part

Next:

Tried those packages
xf86-video-intel-20201226-x86_64-1gv.md5
xf86-video-intel-20201226-x86_64-1gv.txz

with:
sudo mkdir -p /mnt/usb
sudo mount /dev/sdb1 /mnt/usb
cd /mnt/usb
sudo spkg *.txz
cd
sudo umount /mnt/usb

no change. I took the 5.10.3 Kernel packs and executed with previous command lines.

result:
After the code it began to load the various kernels... headers...source...etc.
then i got the ERROR: Failed to load the packages.

Restart: no working grub anymore. Just a freezed:


ELILO v3.16 for EFI/x86_64
.
Loading kernel vmlinuz... done



Thank you very much