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[Regression] 580.105.08: DisplayPort monitor limited to 1920x1080 instead of native 2560x1440 #960

@darklenre

Description

@darklenre

NVIDIA Open GPU Kernel Modules Version

580.105.08

Please confirm this issue does not happen with the proprietary driver (of the same version). This issue tracker is only for bugs specific to the open kernel driver.

  • I confirm that this does not happen with the proprietary driver package.

Operating System and Version

CachyOS

Kernel Release

6.17.7-3-cachyos

Please confirm you are running a stable release kernel (e.g. not a -rc). We do not accept bug reports for unreleased kernels.

  • I am running on a stable kernel release.

Hardware: GPU

NVIDIA RTX A2000 12GB

Describe the bug

Bug Report

NVIDIA Driver Version: 580.105.08
Previous Working Version: 580.95.05
GPU: NVIDIA RTX A2000 12GB
OS: CachyOS (Arch-based)
Kernel: 6.17.7
Display Server: Wayland (KDE Plasma 6.5.1)
Monitor: Lenovo ThinkVision T27h-30 (2560x1440 native)
Connection: Mini-DisplayPort to DisplayPort

Issue

After updating from driver 580.95.05 to 580.105.08, my DisplayPort-connected monitor is limited to 1920x1080 maximum resolution instead of its native 2560x1440@60Hz.

Evidence

  • EDID correctly reports 2560x1440 as preferred mode
  • /sys/class/drm/card1-DP-1/modes shows maximum 1920x1080
  • edid-decode confirms monitor advertises 2560x1440@60Hz
  • Downgrading to 580.95.05 resolves the issue

Reproduction

  1. Update nvidia-utils to 580.105.08
  2. Connect 2560x1440 DisplayPort monitor
  3. Check available resolutions - maximum is 1920x1080

Related Reports

Multiple users affected: https://discuss.cachyos.org/t/after-updating-linux-cachyos-nvidia-linux-cachyos-rc-nvidia-linux-cachyos-lts-nvidia-nvidia-driver-version-580-105-08-the-dual-screen-display-resolution-is-incorrect/18057

https://discuss.cachyos.org/t/suddenly-missing-higher-resolution-on-second-monitor/18101/14

To Reproduce

  1. Update nvidia-utils to 580.105.08
  2. Connect 2560x1440 DisplayPort monitor
  3. Check available resolutions - maximum is 1920x1080

Bug Incidence

Always

nvidia-bug-report.log.gz

nvidia-bug-report.log.gz

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