Errors in the environment – XFCE

I apologize for the translator.

Good afternoon.
I came across on my desktop computer that the desktop environment is falling. In the beginning it was – artifacts just randomly began to appear (application windows were not fully loaded, the picture hung). Demolished the system. Now it’s just DE-closed as if it made a logout.

00:00.0 Host bridge: Intel Corporation Comet Lake-S 6c Host Bridge/DRAM Controller (rev 05)
00:01.0 PCI bridge: Intel Corporation 6th-10th Gen Core Processor PCIe Controller (x16) (rev 05)
00:14.0 USB controller: Intel Corporation Tiger Lake-H USB 3.2 Gen 2×1 xHCI Host Controller (rev 11)
00:14.2 RAM memory: Intel Corporation Tiger Lake-H Shared SRAM (rev 11)
00:16.0 Communication controller: Intel Corporation Tiger Lake-H Management Engine Interface (rev 11)
00:17.0 SATA controller: Intel Corporation Device 43d2 (rev 11)
00:1b.0 PCI bridge: Intel Corporation Device 43c4 (rev 11)
00:1f.0 ISA bridge: Intel Corporation Device 4387 (rev 11)
00:1f.3 Audio device: Intel Corporation Device f0c8 (rev 11)
00:1f.4 SMBus: Intel Corporation Tiger Lake-H SMBus Controller (rev 11)
00:1f.5 Serial bus controller: Intel Corporation Tiger Lake-H SPI Controller (rev 11)
00:1f.6 Ethernet controller: Intel Corporation Ethernet Connection (14) I219-V (rev 11)
01:00.0 VGA compatible controller: NVIDIA Corporation GK208B [GeForce GT 730] (rev a1)
01:00.1 Audio device: NVIDIA Corporation GK208 HDMI/DP Audio Controller (rev a1)
02:00.0 Non-Volatile memory controller: KIOXIA Corporation Device 0008 (rev 01)

From the wiki, the section with NVIDIA did the instructions. It didn’t help.
DE xfce4 + lightdm