Sounds like a fix is in 525.105.17: > Fixed an issue which could cause applications to run at 1 FPS > when using an NVIDIA PRIME Display Offload sink as the only > active display.
[https://www.nvidia.com/Download/driverResults.aspx/202351/en-us/] -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to xorg-server in Ubuntu. https://bugs.launchpad.net/bugs/2009767 Title: External HDMI monitor is laggy on NVIDIA-525 reverse PRIME system Status in OEM Priority Project: New Status in nvidia-graphics-drivers-525 package in Ubuntu: Confirmed Status in xorg-server package in Ubuntu: Fix Released Status in nvidia-graphics-drivers-525 source package in Jammy: New Status in xorg-server source package in Jammy: Confirmed Status in nvidia-graphics-drivers-525 source package in Kinetic: Confirmed Status in xorg-server source package in Kinetic: Fix Released Bug description: [Summary] When the graphic mode is on-demand mode and plug in the monitor to HDMI port, there are two issue occures: 1. External monitor's screen is very laggy in external monitor mode only. 2. External monitor's screen sometimes (~50%) will be blak in join display mode. [Steps to reproduce] 1. Boot in OS 2. Plug in the external monitor in HDMI port 3. Find the cursor moving in external monitor is laggy [Workaround] Downgrade to NVIDIA driver 515. [Additional information] Feedback from NV: An NVIDIA driver built with the features needed to get rid of the laggy monitor problem causes Xorg 1.21.1.3 to crash. There's a patch for Xorg to fix the crash (https://gitlab.freedesktop.org/xorg/xserver/-/issues/1275) and it was first included in the 1.21.1.4 release. Since the older X servers crash, NVIDIA deliberately does a version check in the driver and enables these features for Xorg servers that are known to work, i.e. 1.21.1.4 or higher. This unfortunately prevents backporting the fix to 1.21.1.3. Engineering has chosen this approach since a crash is worse than the low FPS lag and the user might lose work merely by plugging/unplugging displays. If it was about a performance degradation, slight corruption, or something non-fatal, we wouldn't need to check Xorg version To manage notifications about this bug go to: https://bugs.launchpad.net/oem-priority/+bug/2009767/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
