Windows rendering rotated 180° on inverted HDMI-A‑1 monitor after RTX 3090 Ti upgrade

[PiRifle]

After upgrading from an RTX 2070 to an RTX 3090 Ti, the additional upside‑down (inverted) monitor shows the mouse cursor correctly, but all windows and applications are rendered rotated 180°. The wallpaper remains correctly oriented. This worked perfectly on the RTX 2070.

I’m using GDM 48.0 as my session manager/lock screen and Hyprland 0.50.1 on a Zen‑kernel Wayland setup.

NOTE ON VIDEO:

• i messed up the DP-1 on the right display. it should be HDMI-1
• the mouse is properly oriented

video.mp4

Environment

NVIDIA driver version

$ cat /sys/module/nvidia/version
575.64.05

Kernel

$ uname -r
6.15.8-zen1-1-zen

GDM (session manager / lock screen)

$ gdm --version
GDM 48.0

Hyprland

$ hyprland -v
Hyprland 0.50.1 built from branch at commit 4e242d086e20b32951fdc0ebcb4d41b5be8dcc
Date: Sat Jul 19 21:37:06 2025
built against:
aquamarine 0.9.2
hyprlang 0.6.3
hyprutils 0.8.1
hyprcursor 0.1.12
hyprgraphics 0.1.5

Display Layout & Transforms

xrandr summary + verbose

$ xrandr --listmonitors && xrandr -q --verbose
Monitors: 2
0: +HDMI-A-1 2560/670x1080/280+0+0 HDMI-A-1
1: +DP-1 3440/800x1440/340+2560+0 DP-1
Screen 0: minimum 16 x 16, current 6000 x 1440, maximum 32767 x 32767
HDMI-A-1 connected 2560x1080+0+0 (0x25) inverted (normal left inverted right x axis y axis) 670mm x 280mm
[…more mode listings…]
DP-1 connected 3440x1440+2560+0 (0x42) normal (normal left inverted right x axis y axis) 800mm x 340mm
[…more mode listings…]

Hyprland monitor settings

$ hyprctl monitors all
Monitor HDMI-A-1 (ID 0):
2560x1080@60.00000 at 120x1440
transform: 2
scale: 1.00
format: XRGB8888
Monitor DP-1 (ID 1):
3440x1440@75.05000 at 0x0
transform: 0
scale: 1.00
format: XRGB8888

Hyprland Configuration

~/.config/hypr/hyprland.conf

…AUTOGENERATED HEADER…
monitor=DP-1, 3440x1440@75, 0x0, 1
monitor=HDMI-A-1, 2560x1080, 120x1440, 1, transform, 2
env = WLR_NO_HARDWARE_CURSORS,1
…rest of the autogenerated config…
env = HYPRCURSOR_SIZE,16

windowrule, decoration, input, binds, etc.

Additional Information

The issue did not occur with the RTX 2070.

The mouse cursor respects the inversion; only window contents are flipped.

Wallpaper rendered by hyprpaper remains correctly oriented.

Using GDM/Wayland, XWayland windows are also affected.

[PiRifle]

ok... i have been stuck with this for a week, but i didn't try to remove transform and add the no_hardware_cursors = true in the cursor namespace. This did the trick