Xid 32 crashes with OLED monitor on Wayland (KDE Plasma) - RTX 2080 Ti

[xytras1]

System Information

• OS: CachyOS (Arch-based)
• Kernel: 6.18.2-2-cachyos
• Driver: nvidia-open 590.48.01
• GPU: NVIDIA GeForce RTX 2080 Ti (TU102)
• Desktop: KDE Plasma 6 (Wayland/KWin)
• Monitor: ASUS XG27ACDMS OLED (2560x1440 @ 144Hz via DisplayPort 1.4)

Description

Random Xid 32 errors causing complete GPU context loss and black screen on KDE Plasma Wayland. The system becomes unresponsive and requires a hard reboot.

Key observation: This issue does NOT occur with an LCD monitor on the same system. The OLED monitor works flawlessly on Windows 11 at full refresh rate (280Hz).

Error Logs

NVRM: GPU at PCI:0000:09:00: GPU-4dfe1525-6c08-3c15-69b4-4141c28dfde6
NVRM: Xid (PCI:0000:09:00): 32, pid=1561, name=kwin_wayland, channel 0x00000059 intr1 00000008 HCE_DBG0 00000c00 HCE_DBG1 00000000
NVRM: Xid (PCI:0000:09:00): 32, pid=1561, name=kwin_wayland, channel 0x00000059 intr1 00000008 HCE_DBG0 00000c04 HCE_DBG1 8210c000

Followed by:

kwin_wayland: Create Context failed "EGL_BAD_CONTEXT"
kwin_wayland: QRhiGles2: Failed to create temporary context
kwin_wayland: Applying output configuration failed!

Steps to Reproduce

1. Connect ASUS XG27ACDMS OLED monitor via DisplayPort
2. Run KDE Plasma on Wayland with nvidia-open driver
3. Use system normally - crash occurs randomly (sometimes after DPMS wake, sometimes during normal use)

Workarounds Attempted (none successful)

• NVreg_PreserveVideoMemoryAllocations=1
• NVreg_EnableGpuFirmware=0
• Lower refresh rate (144Hz instead of 280Hz)
• VRR disabled on monitor
• DisplayPort 1.4 mode (not 2.0/2.1)

Additional Context

• Secondary monitor (1080p LCD) connected to AMD RX 6400 on same system
• Issue is specific to OLED + nvidia-open + Wayland combination
• Crashes are random - not always tied to DPMS/suspend