Ubuntu开启DP接口第二屏幕时卡顿死机求助

Hey there, let's tackle this frustrating issue with your GeForce 1050. It's really annoying when a previously working dual-monitor setup starts crashing just from using the DP port—especially with that nvidia-modeset process eating up all your CPU. You've already tried the basics (driver reinstalls, new DP cable), so let's dive into more targeted fixes:

Step 1: Check Display and GPU DP Port Firmware/Hardware #

• Update your monitor's firmware: HDMI and DP use different handshake protocols, so even if HDMI works, a buggy DP firmware on your monitor could trigger this crash. Head to your monitor manufacturer's website to see if there's a firmware update available—many models let you update via USB drive.
• Test alternate DP ports (if available): If your monitor has multiple DP inputs, switch to a different one. Sometimes individual port modules develop hardware glitches that only affect DP connections.
• Inspect the GPU's DP port: Look for physical damage (bent pins, dust buildup) on your 1050's DP port. Gently clean the port with compressed air if you see dust, and make sure the cable clicks firmly into place when connected.

Step 2: Reset and Manually Configure Display Settings #

• Start with only the HDMI monitor connected: Boot into Windows, open the NVIDIA Control Panel, and navigate to Set up multiple displays. Reset the configuration by unchecking any references to the DP monitor, then save changes.
• Reconnect the DP monitor and manually enable extension: Instead of letting Windows auto-detect the display, manually select "Extend these displays" in the NVIDIA Control Panel. Also, force the DP monitor to use its native resolution and refresh rate (avoid "Auto" settings)—mismatched display parameters can send nvidia-modeset into an infinite loop.

Step 3: Rule Out Software Conflicts #

• Disable non-essential startup apps: Open Task Manager > Startup, and disable any third-party tools that interact with display settings (like desktop enhancers, color calibration software, or game overlay tools). These can hook into NVIDIA's driver processes and cause conflicts.
• Test in Safe Mode: Boot Windows into Safe Mode (which loads only basic drivers and services) and connect the DP monitor. If the system doesn't crash here, the issue is tied to a third-party app or service—you can enable them one by one to find the culprit.

Step 4: Verify Hardware Compatibility/Failure #

• Test the DP monitor on another PC: Connect the problematic monitor to another computer with a DP port. If it works fine there, the issue is likely with your GeForce 1050's DP port (possible internal circuit damage or PCIe connection issues).
• Reseat your GPU: Power off your PC, unplug the power supply, then remove and reinsert the GeForce 1050 into its PCIe slot. Clean the gold fingers on the GPU with a soft, dry cloth to ensure a solid connection—loose PCIe contact can cause intermittent port failures.

Quick Note on HDMI Splitters #

You mentioned trying an HDMI splitter but didn't finish—most basic splitters only support mirroring, not extended displays. If you need a workaround while troubleshooting the DP port, you'd need an HDMI matrix or a USB-to-HDMI/DP adapter (using a USB 3.0+ port) to add a second extended display.

内容的提问来源于stack exchange，提问作者Olga