Hello community, it's a pleasure to be here with you....

I will explain my case as briefly as possible.

I have a strip on the right side of my monitor screen (1920x1080) that is sometimes invisible and sometimes black.

It is definitely not a monitor issue since, what is hidden behind it is the active window that is there, but the cursor can be seen well OVER that strip (screenshot attached).

I already tried with different resolutions, I changed the nvidia v460 driver for nouveau and it was worse, so I went back to the nvidia one.

By the way, I don't know if it's linked to this, but when I switch from nvidia to nouveau and then back to nvidia, the grub loading first shows weird screens and then it loads fine to choose between win7 and Deepin. If I choose Win7 it displays perfectly at 1920x1080 without that sideband.

Link to show issue (very short video): https://youtu.be/pWTAkjuBX00

Thanks in advance for reply

The fact that the cursor is visible points to this being a driver or graphics adapter issue. The mouse cursor is usually a hardware sprite, and can often appear normal over otherwise corrupted graphics.

What is the exact make and model of your GPU? (Post the output of lspci -v)

You say the nouveau driver was "worse." Please describe exactly how it was different.

Which kernel are you running? (Post the output of uname -a)

Afeter all, thanks for reply

max@max-deepin:~$ lspci -v
00:00.0 Host bridge: Intel Corporation 82X38/X48 Express DRAM Controller
Subsystem: Hewlett-Packard Company 82X38/X48 Express DRAM Controller
Flags: bus master, fast devsel, latency 0
Capabilities: <access denied>
Kernel driver in use: x38_edac
Kernel modules: x38_edac

00:01.0 PCI bridge: Intel Corporation 82X38/X48 Express Host-Primary PCI Express Bridge (prog-if 00 [Normal decode])
Flags: bus master, fast devsel, latency 0, IRQ 24
Bus: primary=00, secondary=01, subordinate=01, sec-latency=0
I/O behind bridge: 00001000-00001fff
Memory behind bridge: f2000000-f30fffff
Prefetchable memory behind bridge: 00000000e8000000-00000000f1ffffff
Capabilities: <access denied>
Kernel driver in use: pcieport

00:1a.0 USB controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #4 (rev 02) (prog-if 00 [UHCI])
Subsystem: Hewlett-Packard Company 82801I (ICH9 Family) USB UHCI Controller
Flags: bus master, medium devsel, latency 0, IRQ 20
I/O ports at 2100 [size=32]
Capabilities: <access denied>
Kernel driver in use: uhci_hcd

00:1a.1 USB controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #5 (rev 02) (prog-if 00 [UHCI])
Subsystem: Hewlett-Packard Company 82801I (ICH9 Family) USB UHCI Controller
Flags: bus master, medium devsel, latency 0, IRQ 21
I/O ports at 2120 [size=32]
Capabilities: <access denied>
Kernel driver in use: uhci_hcd

00:1a.2 USB controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #6 (rev 02) (prog-if 00 [UHCI])
Subsystem: Hewlett-Packard Company 82801I (ICH9 Family) USB UHCI Controller
Flags: bus master, medium devsel, latency 0, IRQ 22
I/O ports at 2140 [size=32]
Capabilities: <access denied>
Kernel driver in use: uhci_hcd

00:1a.7 USB controller: Intel Corporation 82801I (ICH9 Family) USB2 EHCI Controller #2 (rev 02) (prog-if 20 [EHCI])
Subsystem: Hewlett-Packard Company 82801I (ICH9 Family) USB2 EHCI Controller
Flags: bus master, medium devsel, latency 0, IRQ 22
Memory at f3204800 (32-bit, non-prefetchable) [size=1K]
Capabilities: <access denied>
Kernel driver in use: ehci-pci

00:1b.0 Audio device: Intel Corporation 82801I (ICH9 Family) HD Audio Controller (rev 02)
Subsystem: Hewlett-Packard Company 82801I (ICH9 Family) HD Audio Controller
Flags: bus master, fast devsel, latency 0, IRQ 30
Memory at f3200000 (64-bit, non-prefetchable) [size=16K]
Capabilities: <access denied>
Kernel driver in use: snd_hda_intel
Kernel modules: snd_hda_intel

00:1c.0 PCI bridge: Intel Corporation 82801I (ICH9 Family) PCI Express Port 1 (rev 02) (prog-if 00 [Normal decode])
Flags: bus master, fast devsel, latency 0, IRQ 25
Bus: primary=00, secondary=28, subordinate=28, sec-latency=0
I/O behind bridge: 00003000-00003fff
Memory behind bridge: f8000000-f81fffff
Prefetchable memory behind bridge: 00000000f8200000-00000000f83fffff
Capabilities: <access denied>
Kernel driver in use: pcieport

00:1c.4 PCI bridge: Intel Corporation 82801I (ICH9 Family) PCI Express Port 5 (rev 02) (prog-if 00 [Normal decode])
Flags: bus master, fast devsel, latency 0, IRQ 26
Bus: primary=00, secondary=34, subordinate=34, sec-latency=0
I/O behind bridge: 00004000-00004fff
Memory behind bridge: f8400000-f85fffff
Prefetchable memory behind bridge: 00000000f8600000-00000000f87fffff
Capabilities: <access denied>
Kernel driver in use: pcieport

00:1c.5 PCI bridge: Intel Corporation 82801I (ICH9 Family) PCI Express Port 6 (rev 02) (prog-if 00 [Normal decode])
Flags: bus master, fast devsel, latency 0, IRQ 27
Bus: primary=00, secondary=3f, subordinate=3f, sec-latency=0
I/O behind bridge: 00005000-00005fff
Memory behind bridge: f3100000-f31fffff
Prefetchable memory behind bridge: 00000000f8800000-00000000f89fffff
Capabilities: <access denied>
Kernel driver in use: pcieport

00:1d.0 USB controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #1 (rev 02) (prog-if 00 [UHCI])
Subsystem: Hewlett-Packard Company 82801I (ICH9 Family) USB UHCI Controller
Flags: bus master, medium devsel, latency 0, IRQ 20
I/O ports at 2160 [size=32]
Capabilities: <access denied>
Kernel driver in use: uhci_hcd

00:1d.1 USB controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #2 (rev 02) (prog-if 00 [UHCI])
Subsystem: Hewlett-Packard Company 82801I (ICH9 Family) USB UHCI Controller
Flags: bus master, medium devsel, latency 0, IRQ 21
I/O ports at 2180 [size=32]
Capabilities: <access denied>
Kernel driver in use: uhci_hcd

00:1d.2 USB controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #3 (rev 02) (prog-if 00 [UHCI])
Subsystem: Hewlett-Packard Company 82801I (ICH9 Family) USB UHCI Controller
Flags: bus master, medium devsel, latency 0, IRQ 22
I/O ports at 21a0 [size=32]
Capabilities: <access denied>
Kernel driver in use: uhci_hcd

00:1d.7 USB controller: Intel Corporation 82801I (ICH9 Family) USB2 EHCI Controller #1 (rev 02) (prog-if 20 [EHCI])
Subsystem: Hewlett-Packard Company 82801I (ICH9 Family) USB2 EHCI Controller
Flags: bus master, medium devsel, latency 0, IRQ 20
Memory at f3204c00 (32-bit, non-prefetchable) [size=1K]
Capabilities: <access denied>
Kernel driver in use: ehci-pci

00:1e.0 PCI bridge: Intel Corporation 82801 PCI Bridge (rev 92) (prog-if 01 [Subtractive decode])
Flags: bus master, fast devsel, latency 0
Bus: primary=00, secondary=10, subordinate=10, sec-latency=32
Capabilities: <access denied>

00:1f.0 ISA bridge: Intel Corporation 82801IR (ICH9R) LPC Interface Controller (rev 02)
Subsystem: Hewlett-Packard Company 82801IR (ICH9R) LPC Interface Controller
Flags: bus master, medium devsel, latency 0
Capabilities: <access denied>
Kernel driver in use: lpc_ich
Kernel modules: lpc_ich

00:1f.2 RAID bus controller: Intel Corporation SATA Controller [RAID mode] (rev 02)
Subsystem: Hewlett-Packard Company SATA Controller [RAID mode]
Flags: bus master, 66MHz, medium devsel, latency 0, IRQ 28
I/O ports at 2200 [size=8]
I/O ports at 2210 [size=4]
I/O ports at 2208 [size=8]
I/O ports at 2214 [size=4]
I/O ports at 21c0 [size=32]
Memory at f3204000 (32-bit, non-prefetchable) [size=2K]
Capabilities: <access denied>
Kernel driver in use: ahci
Kernel modules: ahci

01:00.0 VGA compatible controller: NVIDIA Corporation GK208B [GeForce GT 710] (rev a1) (prog-if 00 [VGA controller])
Subsystem: Gigabyte Technology Co., Ltd GK208B [GeForce GT 710]
Physical Slot: 2
Flags: bus master, fast devsel, latency 0, IRQ 31
Memory at f2000000 (32-bit, non-prefetchable) [size=16M]
Memory at e8000000 (64-bit, prefetchable) [size=128M]
Memory at f0000000 (64-bit, prefetchable) [size=32M]
I/O ports at 1100 [size=128]
[virtual] Expansion ROM at 000c0000 [disabled] [size=128K]
Capabilities: <access denied>
Kernel driver in use: nvidia
Kernel modules: nvidia

01:00.1 Audio device: NVIDIA Corporation GK208 HDMI/DP Audio Controller (rev a1)
Subsystem: Gigabyte Technology Co., Ltd GK208 HDMI/DP Audio Controller
Physical Slot: 2
Flags: bus master, fast devsel, latency 0, IRQ 17
Memory at f3000000 (32-bit, non-prefetchable) [size=16K]
Capabilities: <access denied>
Kernel driver in use: snd_hda_intel
Kernel modules: snd_hda_intel

3f:00.0 Ethernet controller: Broadcom Inc. and subsidiaries NetXtreme BCM5755 Gigabit Ethernet PCI Express (rev 02)
Subsystem: Hewlett-Packard Company NetXtreme BCM5755 Gigabit Ethernet PCI Express
Physical Slot: 0
Flags: bus master, fast devsel, latency 0, IRQ 29
Memory at f3100000 (64-bit, non-prefetchable) [size=64K]
Expansion ROM at <ignored> [disabled]
Capabilities: <access denied>
Kernel driver in use: tg3
Kernel modules: tg3

max@max-deepin:~$

============********=============

max@max-deepin:~$ uname -a
Linux max-deepin 5.10.60-amd64-desktop #1 SMP Thu Aug 26 18:24:56 CST 2021 x86_64 GNU/Linux
max@max-deepin:~$



==== I've switched to HDMI output and works perfectly, but I need VGA output due to HDMI is for TV Screen input and VGA is for Monitor. ====

Thanks again