** Description changed: I installed: " linux-lowlatency " which installed kernel 5.4 and I had very low resolution. Then I installed linux-lowlatency-hwe-20.04 linux-lowlatency-hwe-20.04-edge which installed kernel 5.8 Yesterday kernel lowlatency worked, today not working with nvidia. I tried update system today, but it not helped. Questions: 1. Is any documentation for what it is "hwe" and "edge" from "linux-lowlatency-hwe-20.04-edge" ? 2. I use Linux Mint 20.1 and kernel lowlatency and sometimes nvidia driver not working. More often does not work. ======================================================================== I've compared Xorg.0.log with Meld and with low latency is missing line for example: ------------------------- [ 13.804] (II) xfree86: Adding drm device (/dev/dri/card0) [ 13.806] (**) OutputClass "nvidia" ModulePath extended to "/usr/lib/x86_64-linux-gnu/nvidia/xorg,/usr/lib/xorg/modules" ... [ 13.845] (II) Applying OutputClass "nvidia" to /dev/dri/card0 [ 13.845] loading driver: nvidia [ 14.084] (==) Matched nvidia as autoconfigured driver 0 ... [ 14.084] (II) LoadModule: "nvidia" [ 14.084] (II) Loading /usr/lib/x86_64-linux-gnu/nvidia/xorg/nvidia_drv.so [ 14.093] (II) Module nvidia: vendor="NVIDIA Corporation" [ 14.093] compiled for 1.6.99.901, module version = 1.0.0 [ 14.093] Module class: X.Org Video Driver ... [ 14.100] (II) NVIDIA dlloader X Driver 460.39 Thu Jan 21 21:54:11 UTC 2021 [ 14.100] (II) NVIDIA Unified Driver for all Supported NVIDIA GPUs ... [ 14.104] (II) Loading sub module "fb" [ 14.104] (II) LoadModule: "fb" [ 14.104] (II) Loading /usr/lib/xorg/modules/libfb.so [ 14.105] (II) Module fb: vendor="X.Org Foundation" [ 14.105] compiled for 1.20.9, module version = 1.0.0 [ 14.105] ABI class: X.Org ANSI C Emulation, version 0.4 [ 14.105] (II) Loading sub module "wfb" [ 14.105] (II) LoadModule: "wfb" ... ------------------------- Then with lowlatency kernel I have -------------- [ 13.187] (EE) [drm] Failed to open DRM device for pci:0000:01:00.0: -19 ... [ 13.188] (EE) Screen 0 deleted because of no matching config section. -------------- + From other Xorg.log with 5.8.0-44-lowlatency #50~20.04.1-Ubuntu + the same error: + -------------- + ... + [ 12.110] (EE) [drm] Failed to open DRM device for pci:0000:01:00.0: -19 + [ 12.110] (EE) open /dev/dri/card0: No such file or directory + [ 12.110] (WW) Falling back to old probe method for modesetting + [ 12.110] (EE) open /dev/dri/card0: No such file or directory + [ 12.110] (II) Loading sub module "fbdevhw" + [ 12.110] (II) LoadModule: "fbdevhw" + [ 12.110] (II) Loading /usr/lib/xorg/modules/libfbdevhw.so + [ 12.111] (II) Module fbdevhw: vendor="X.Org Foundation" + [ 12.111] compiled for 1.20.9, module version = 0.0.2 + [ 12.111] ABI class: X.Org Video Driver, version 24.1 + [ 12.111] (**) FBDEV(1): claimed PCI slot 1@0:0:0 + [ 12.111] (II) FBDEV(1): using default device + [ 12.111] (EE) Screen 0 deleted because of no matching config section. + ... + -------------- ------------------------------------------------------------------- $ apt policy linux-lowlatency-hwe-20.04 linux-lowlatency-hwe-20.04: Installed: 5.8.0.44.50~20.04.30 Candidate: 5.8.0.44.50~20.04.30 Version table: *** 5.8.0.44.50~20.04.30 500 500 http://archive.ubuntu.com/ubuntu focal-updates/main amd64 Packages 500 http://security.ubuntu.com/ubuntu focal-security/main amd64 Packages 100 /var/lib/dpkg/status 5.4.0.26.32 500 500 http://archive.ubuntu.com/ubuntu focal/main amd64 Packages ------------------------------------------------------------------- ------------------------------------------------------------------- $ inxi -Fxxxrz System: Kernel: 5.8.0-44-generic x86_64 bits: 64 compiler: N/A Desktop: MATE 1.24.0 info: mate-panel wm: marco 1.24.0 dm: LightDM 1.30.0 Distro: Linux Mint 20.1 Ulyssa base: Ubuntu 20.04 focal Machine: Type: Desktop Mobo: MSI model: B150M PRO-VDH (MS-7982) v: 1.0 serial: <filter> UEFI [Legacy]: American Megatrends v: 3.H0 date: 07/10/2018 CPU: Topology: Quad Core model: Intel Core i5-6400 bits: 64 type: MCP arch: Skylake-S rev: 3 L2 cache: 6144 KiB flags: avx avx2 lm nx pae sse sse2 sse3 sse4_1 sse4_2 ssse3 vmx bogomips: 21599 Speed: 1539 MHz min/max: 800/3300 MHz Core speeds (MHz): 1: 1539 2: 1427 3: 2087 4: 1516 Graphics: Device-1: NVIDIA GK106 [GeForce GTX 660] vendor: Gigabyte driver: nvidia v: 460.39 bus ID: 01:00.0 chip ID: 10de:11c0 Display: x11 server: X.Org 1.20.9 driver: nvidia unloaded: fbdev,modesetting,nouveau,vesa compositor: marco v: 1.24.0 resolution: 1920x1080~60Hz OpenGL: renderer: GeForce GTX 660/PCIe/SSE2 v: 4.6.0 NVIDIA 460.39 direct render: Yes ------------------------------------------------------------------- With lowlatency kernel system automatically switches to mesa driver in very low resolution: ------------------------------------------------------------------- Graphics: Device-1: NVIDIA GK106 [GeForce GTX 660] vendor: Gigabyte driver: nvidia v: 460.39 bus ID: 01:00.0 chip ID: 10de:11c0 Display: x11 server: X.Org 1.20.9 driver: fbdev,modesetting,nouveau unloaded: vesa compositor: marco v: 1.24.0 resolution: 640x480~73Hz OpenGL: renderer: llvmpipe (LLVM 11.0.0 256 bits) v: 4.5 Mesa 20.2.6 compat-v: 3.1 direct render: Yes -------------------------------------------------------------------
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