[Bug 2059847] Re: Input lag or freezes on Nvidia desktops with X11 after logging "MetaSyncRing: Sync object is not ready -- were events handled properly?"

[Robin Bonicel]

I opened a similar bug and @vanvugt advised me to come here. 
I read everything and will try the PPA if need be. 

But I'm using a driver that nobody mentioned, which was selected by Dell who assembled the machine and installed the OS.
On Nvidia driver section, I'm using "Set the power ondemand mode by default from oem-fix-gfx-nvidia-ondemandmode". I also have drives 535 and 470 available in the menu, but when I install them, my default setting disappears. I had to fully reinstall the OS to get it back. Nvidia themselves advise on their download page to not necessarily use their proprietary drivers on some Linux distribs, so I stuck with my default driver. 

Will the PPA and the mutter downgrade be of use with this default setting ?
Also, installing proprietary pilot from the Software & update menu raised an error, so I aborted the process.

I'm running :

- Ubuntu 22.4.04 LTS
- GNOME 42.9 (latest official update)
- X11
- NVIDIA T400 4GB  

Thank you

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https://bugs.launchpad.net/bugs/2059847

Title:
  Input lag or freezes on Nvidia desktops with X11 after logging
  "MetaSyncRing: Sync object is not ready -- were events handled
  properly?"

Status in Mutter:
  Fix Released
Status in mutter package in Ubuntu:
  In Progress
Status in mutter source package in Jammy:
  In Progress
Status in mutter source package in Mantic:
  In Progress
Status in mutter source package in Noble:
  In Progress

Bug description:
  [ Impact ]

  Input or the entire screen may freeze at times on systems using the
  Nvidia Xorg driver with GNOME.

  [ Test Plan ]

  0. Set up a desktop with Nvidia driver 545 or 550.
  1. Log into Ubuntu, ensuring it's a Xorg session.
  2. Open a Terminal, resize it vigorously, and type several lines of text.
  3. Run: journalctl -b0 | grep MetaSyncRing
  4. Verify the above command does NOT show "MetaSyncRing" messages such as:

  Window manager warning: MetaSyncRing: Sync object is not ready -- were events handled properly?
  Window manager warning: MetaSyncRing: Sync object is not ready -- were events handled properly?
  Window manager warning: MetaSyncRing: Sync object is not ready -- were events handled properly?
  Window manager warning: MetaSyncRing: Too many reboots -- disabling

  [ Where problems could occur ]

  Anywhere in Nvidia (proprietary driver) Xorg sessions since the code
  being modified is only used with that driver.

  [ Original Description ]

  There is a noticeable delay in input while using the native terminal.
  I belive it was caused by a recent software update, as this issue is
  relatively new.

  ProblemType: Bug
  DistroRelease: Ubuntu 22.04
  Package: ubiquity (not installed)
  ProcVersionSignature: Ubuntu 6.5.0-26.26~22.04.1-generic 6.5.13
  Uname: Linux 6.5.0-26-generic x86_64
  NonfreeKernelModules: nvidia_modeset nvidia wl
  ApportVersion: 2.20.11-0ubuntu82.5
  Architecture: amd64
  CasperMD5CheckResult: pass
  CurrentDesktop: ubuntu:GNOME
  Date: Sat Mar 30 19:57:13 2024
  InstallCmdLine: BOOT_IMAGE=/casper/vmlinuz file=/cdrom/preseed/ubuntu.seed maybe-ubiquity quiet splash ---
  InstallationDate: Installed on 2024-03-30 (0 days ago)
  InstallationMedia: Ubuntu 22.04.4 LTS "Jammy Jellyfish" - Release amd64 (20240220)
  SourcePackage: ubiquity
  Symptom: installation
  UpgradeStatus: No upgrade log present (probably fresh install)

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