NVreg_PreserveVideoMemoryAllocations behaves well with the 570 driver and kernel 6.14 as in plucky.
Because it works by dumping the allocated memory to a filesystem, here are the edge case scenarios to consider: 1) If NVreg_TemporaryFilePath points to disk-backed storage and the free space on the filesystem is not enough to hold the entirety of the GPU memory used, unpon resume the nvidia-drm driver fails with: nvidia-modeset: ERROR: GPU:0: Failed to bind display engine notify surface descriptor: 0x1a (Ran out of a critical resource, other than memory [NV_ERR_INSUFFICIENT_RESOURCES]) nvidia-modeset: ERROR: GPU:0: Failed to allocate display engine core DMA push buffer nvidia-modeset: ERROR: GPU:0: Failed to bind display engine notify surface descriptor: 0x1a (Ran out of a critical resource, other than memory [NV_ERR_INSUFFICIENT_RESOURCES]) nvidia-modeset: ERROR: GPU:0: Failed to allocate display engine core DMA push buffer [drm:__nv_drm_connector_detect_internal [nvidia_drm]] *ERROR* [nvidia-drm] [GPU ID 0x00002900] Failed to detect display state [drm:__nv_drm_connector_detect_internal [nvidia_drm]] *ERROR* [nvidia-drm] [GPU ID 0x00002900] Failed to detect display state [drm:__nv_drm_connector_detect_internal [nvidia_drm]] *ERROR* [nvidia-drm] [GPU ID 0x00002900] Failed to detect display state [drm:__nv_drm_connector_detect_internal [nvidia_drm]] *ERROR* [nvidia-drm] [GPU ID 0x00002900] Failed to detect display state [drm:__nv_drm_connector_detect_internal [nvidia_drm]] *ERROR* [nvidia-drm] [GPU ID 0x00002900] Failed to detect display state [drm:__nv_drm_connector_detect_internal [nvidia_drm]] *ERROR* [nvidia-drm] [GPU ID 0x00002900] Failed to detect display state [drm:__nv_drm_connector_detect_internal [nvidia_drm]] *ERROR* [nvidia-drm] [GPU ID 0x00002900] Failed to detect display state [drm:__nv_drm_connector_detect_internal [nvidia_drm]] *ERROR* [nvidia-drm] [GPU ID 0x00002900] Failed to detect display state [drm:__nv_drm_connector_detect_internal [nvidia_drm]] *ERROR* [nvidia-drm] [GPU ID 0x00002900] Failed to detect display state [drm:__nv_drm_connector_detect_internal [nvidia_drm]] *ERROR* [nvidia-drm] [GPU ID 0x00002900] Failed to detect display state [drm:__nv_drm_connector_detect_internal [nvidia_drm]] *ERROR* [nvidia-drm] [GPU ID 0x00002900] Failed to detect display state [drm:__nv_drm_connector_detect_internal [nvidia_drm]] *ERROR* [nvidia-drm] [GPU ID 0x00002900] Failed to detect display state 2) If NVreg_TemporaryFilePath points to tmpfs and the free space on the filesystem is not enough, unpon resume we're presented with the same issue as (1). This is solvable by creating an ad-hoc tmpfs that is guaranteed to be as big as the sum of all NVIDIA GPUs' memory, but then we might enter issue (3). 3) If NVreg_TemporaryFilePath points to tmpfs and the free system memory+swap space is not enough, the system hangs while trying to enter sleep and the only option is to force reboot. For desktop users this is arguably not much worse than the status quo. However, for laptop users (where the primary GPU is the integrated one) enabling NVreg_PreserveVideoMemoryAllocations risks worsening the experience if they hit the analyzed edge case scenarios. -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to mutter in Ubuntu. https://bugs.launchpad.net/bugs/1876632 Title: [nvidia] Corrupted/missing textures when switching users, switching VTs or resuming from suspend Status in GNOME Shell: New Status in Mutter: Fix Released Status in OEM Priority Project: Confirmed Status in Release Notes for Ubuntu: Fix Released Status in gnome-shell package in Ubuntu: Triaged Status in gtk4 package in Ubuntu: Confirmed Status in mutter package in Ubuntu: Triaged Status in nvidia-graphics-drivers-440 package in Ubuntu: Won't Fix Status in nvidia-graphics-drivers-460 package in Ubuntu: Won't Fix Status in nvidia-graphics-drivers-470 package in Ubuntu: Won't Fix Status in nvidia-graphics-drivers-510 package in Ubuntu: Won't Fix Status in nvidia-graphics-drivers-525 package in Ubuntu: Won't Fix Status in nvidia-graphics-drivers-535 package in Ubuntu: Won't Fix Status in nvidia-graphics-drivers-550 package in Ubuntu: Won't Fix Status in nvidia-graphics-drivers-560 package in Ubuntu: Won't Fix Status in nvidia-graphics-drivers-570 package in Ubuntu: In Progress Bug description: [Impact] The Nvidia driver corrupts and/or forgets its textures when resuming from suspend, by design. Documented here: https://www.khronos.org/registry/OpenGL/extensions/NV/NV_robustness_video_memory_purge.txt *NOTE* that this is actually not a common problem because the system must be using Nvidia as the primary GPU to be affected. So generally only desktop users will encounter the bug, not laptops. And even then, only desktops that use suspend/resume or VT switching may trigger it, if ever. [Workarounds] * Always log into a Xorg session and if corruption occurs then type: Alt+F2, R, Enter * https://download.nvidia.com/XFree86/Linux-x86_64/510.54/README/powermanagement.html#PreserveAllVide719f0 [Test Plan] [Where problems could occur] [Original Bug Report] I recently installed ubuntu 20.04 on my computer, and I am running into an issue when I do the following: * Login with a user on desktop * Select switch user, and login as second user * Switch user again, and return to original user At this point, text and icons in the menubar / sidebar are corrupted. Text and icons in normal windows appear correctly. I have attached a screenshot of what this looks like. Screenshots: https://imgur.com/a/3ZFDLMc ProblemType: Bug DistroRelease: Ubuntu 20.04 Package: xorg 1:7.7+19ubuntu14 ProcVersionSignature: Ubuntu 5.4.0-28.32-generic 5.4.30 Uname: Linux 5.4.0-28-generic x86_64 NonfreeKernelModules: nvidia_modeset nvidia .proc.driver.nvidia.gpus.0000.09.00.0: Error: [Errno 21] Is a directory: '/proc/driver/nvidia/gpus/0000:09:00.0' .proc.driver.nvidia.registry: Binary: "" .proc.driver.nvidia.suspend: suspend hibernate resume .proc.driver.nvidia.suspend_depth: default modeset uvm .proc.driver.nvidia.version: NVRM version: NVIDIA UNIX x86_64 Kernel Module 440.64 Fri Feb 21 01:17:26 UTC 2020 GCC version: ApportVersion: 2.20.11-0ubuntu27 Architecture: amd64 BootLog: Error: [Errno 13] Permission denied: '/var/log/boot.log' CasperMD5CheckResult: skip CompositorRunning: None CurrentDesktop: ubuntu:GNOME Date: Sun May 3 18:12:45 2020 DistUpgraded: Fresh install DistroCodename: focal DistroVariant: ubuntu ExtraDebuggingInterest: Yes GraphicsCard: NVIDIA Corporation GP104 [GeForce GTX 1070] [10de:1b81] (rev a1) (prog-if 00 [VGA controller]) Subsystem: ASUSTeK Computer Inc. GP104 [GeForce GTX 1070] [1043:85a0] InstallationDate: Installed on 2020-05-03 (0 days ago) InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Release amd64 (20200423) MachineType: Gigabyte Technology Co., Ltd. AX370-Gaming ProcEnviron: TERM=xterm-256color PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=en_US.UTF-8 SHELL=/bin/bash ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-5.4.0-28-generic root=/dev/mapper/vgubuntu-root ro quiet splash vt.handoff=7 SourcePackage: xorg Symptom: display UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 06/19/2017 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: F3 dmi.board.asset.tag: Default string dmi.board.name: AX370-Gaming-CF dmi.board.vendor: Gigabyte Technology Co., Ltd. dmi.board.version: se1 dmi.chassis.asset.tag: Default string dmi.chassis.type: 3 dmi.chassis.vendor: Default string dmi.chassis.version: Default string dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrF3:bd06/19/2017:svnGigabyteTechnologyCo.,Ltd.:pnAX370-Gaming:pvrDefaultstring:rvnGigabyteTechnologyCo.,Ltd.:rnAX370-Gaming-CF:rvrse1:cvnDefaultstring:ct3:cvrDefaultstring: dmi.product.family: Default string dmi.product.name: AX370-Gaming dmi.product.sku: Default string dmi.product.version: Default string dmi.sys.vendor: Gigabyte Technology Co., Ltd. version.compiz: compiz N/A version.libdrm2: libdrm2 2.4.101-2 version.libgl1-mesa-dri: libgl1-mesa-dri 20.0.4-2ubuntu1 version.libgl1-mesa-glx: libgl1-mesa-glx 20.0.4-2ubuntu1 version.nvidia-graphics-drivers: nvidia-graphics-drivers-* N/A version.xserver-xorg-core: xserver-xorg-core 2:1.20.8-2ubuntu2 version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:19.1.0-1 version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917+git20200226-1 version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.16-1 To manage notifications about this bug go to: https://bugs.launchpad.net/gnome-shell/+bug/1876632/+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
