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    #1

    Screen tearing and slow redraw after upgrading from 22.04

    After upgrading from 22.04 to 22.10, restarted and got screen tearing choppy ui behavior ui elements don't redraw properly. I'm not sure what exactly went wrong but there doesn't seem to be much information about this happening on 22.10. Everything ran smooth with the older version.

    My specs are i5 4570, 16 gb of ram, AMD R9 280x gpu, Samsung 970 evo SSD as the boot drive.

    Not sure how to diagnose the problem, as I'm pretty new to Linux. Any help would be appreciated, googling didn't seem to have any relevant answers.
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    #2
    What you describe sounds like you are only getting software rendering, and is what I get before I install the Nvidia driver. Which means perhaps an incorrectly installed or configured display driver. But, I would check your monitor settings for a start. Ensure it is at spec. I found mine to be in a mode that is "sorta supported" (75hz horizontal refresh rate) and it too was tearing and choppy.

    Unfortunately, I cannot give you specifics about your rig as the only thing we have in common is the SSD (I use AMD CPU/Nvidia GPUs), but the Radeon driver settings page may give you information about your horizontal and vertical refresh rates, dpi, and other physical settings for the display. You will want to see what GPU driver you are using and what support exists for OGL/OCL/Vulkan and so on. That being said, where are you seeing the tearing? Scrolling webpages in a browser, or in videos for example? The KDE desktop is hardware accelerated, as are Firefox and videos (probably via Mesa with a Radeon). If something is not right, it may be falling back to software mode.

    More detailed info about your rig can be found in System Settings, at the bottom it says "About" and clicking that will give you basic info, and below that will be a button for more information. Click it. Then go to Detailed Information/Graphics.

    You can also install HardInfo (it will be called "System Profiler and Benchmark" in the Kmenu)

    Code:
    sudo apt install hardinfo
    Last edited by ShadYoung; Nov 05, 2022, 06:35 PM.
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      #3

      ​inxi is also another great system resource tool It's CLI but gives a wealth of information
      Code:
      sudo apt install inxi
      once install issue this command
      Code:
      inxi -Fxxzr
      and post the output here.

      You can see more info on inxi here. https://www.tecmint.com/inxi-command...m-information/

      This page may also be of help. Scroll down to the section on amd gpu. https://www.makeuseof.com/fix-screen-tearing-on-linux/
      Last edited by kc1di; Nov 06, 2022, 04:51 AM.
      Dave Kubuntu 20.04 Registered Linux User #462608

      Wireless Script: http://ubuntuforums.org/showthread.p...5#post12350385
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        #4
        sorry for the double post but it doesnt allow me to edit the text

        the inxi outputL

        System:
        Kernel: 5.19.0-23-generic arch: x86_64 bits: 64 compiler: N/A
        Desktop: KDE Plasma v: 5.25.5 tk: Qt v: 5.15.6 wm: kwin_x11 dm: SDDM
        Distro: Ubuntu 22.10 (Kinetic Kudu)
        Machine:
        Type: Desktop System: Gigabyte product: B85M-D2V v: N/A
        serial: <superuser required> Chassis:type: 3 serial: <superuser required>
        Mobo: Gigabyte model: B85M-D2V serial: <superuser required>
        UEFI: American Megatrends v: F7 date: 08/12/2015
        Battery:
        Device-1: hidpp_battery_0 model: Logitech Wireless Touch Keyboard K400 Plus
        serial: <filter> charge: 100% (should be ignored) status: discharging
        CPU:
        Info: quad core model: Intel Core i5-4570 bits: 64 type: MCP arch: Haswell
        level: v3 rev: 3 cache:L1: 256 KiB L2: 1024 KiB L3: 6 MiB
        Speed (MHz):avg: 836 high: 888 min/max: 800/3600 cores:1: 857 2: 800
        3: 800 4: 888 bogomips: 25539
        Flags: avx avx2 ht lm nx pae sse sse2 sse3 sse4_1 sse4_2 ssse3 vmx
        Graphics:
        Device-1: Intel Xeon E3-1200 v3/4th Gen Core Processor Integrated Graphics
        vendor: Gigabyte driver: i915 v: kernel arch: Gen-5.75 ports:active: none
        empty: HDMI-A-1,VGA-1 bus-ID: 00:02.0 chip-ID: 8086:0412
        Device-2: AMD Tahiti XT [Radeon HD 7970/8970 OEM / R9 280X]
        vendor: Gigabyte driver: radeon v: kernel arch: GCN-1 pcie:speed: 8 GT/s
        lanes: 16 ports:active: HDMI-A-2 empty: DP-1,DP-2,DVI-I-1
        bus-ID: 01:00.0 chip-ID: 1002:6798
        Display: x11 server: X.Org v: 1.21.1.4 with: Xwayland v: 22.1.3
        compositor: kwin_x11 driver:X:loaded: modesetting,radeon
        unloaded: fbdev,vesa gpu: radeon display-ID: :0 screens: 1
        Screen-1: 0 s-res: 1920x1080 s-dpi: 96
        Monitor-1: HDMI-A-2 mapped: HDMI-1 model: LG (GoldStar) TV res: 1920x1080
        dpi: 30 diag: 1836mm (72.3")
        OpenGL:renderer: TAHITI ( LLVM 15.0.2 DRM 2.50 5.19.0-23-generic) v: 4.5
        Mesa 22.2.1 direct render: Yes
        Audio:
        Device-1: Intel 8 Series/C220 Series High Definition Audio
        vendor: Gigabyte 8 driver: snd_hda_intel v: kernel bus-ID: 00:1b.0
        chip-ID: 8086:8c20
        Device-2: AMD Tahiti HDMI Audio [Radeon HD 7870 XT / 7950/7970]
        vendor: Gigabyte driver: snd_hda_intel v: kernel pcie:speed: 8 GT/s
        lanes: 16 bus-ID: 01:00.1 chip-ID: 1002:aaa0
        Sound Server-1: ALSA v: k5.19.0-23-generic running: yes
        Sound Server-2: PulseAudio v: 16.1 running: no
        Sound Server-3: PipeWire v: 0.3.58 running: yes
        Network:
        Device-1: Realtek RTL8111/8168/8411 PCI Express Gigabit Ethernet
        vendor: Gigabyte driver: r8169 v: kernel pcie:speed: 2.5 GT/s lanes: 1
        port: d000 bus-ID: 03:00.0 chip-ID: 10ec:8168
        IF: enp3s0 state: up speed: 1000 Mbps duplex: full mac: <filter>
        Drives:
        Local Storage:total: 111.79 GiB used: 18.84 GiB (16.9%)
        ID-1: /dev/sda vendor: Samsung model: SSD 840 EVO 120GB size: 111.79 GiB
        speed: 6.0 Gb/s serial: <filter>
        Partition:
        ID-1: / size: 108.98 GiB used: 18.84 GiB (17.3%) fs: ext4 dev: /dev/sda2
        ID-2: /boot/efi size: 511 MiB used: 5.2 MiB (1.0%) fs: vfat
        dev: /dev/sda1
        Swap:
        ID-1: swap-1 type: file size: 2 GiB used: 0 KiB (0.0%) priority: -2
        file: /swapfile
        Sensors:
        System Temperatures:cpu: 46.0 C mobo: N/A gpu: radeon temp: 46.0 C
        Fan Speeds (RPM): N/A
        Repos:
        Packages: 2075 pm: dpkg pkgs: 2067 pm: snap pkgs: 8
        Active apt repos in: /etc/apt/sources.list
        1: deb http://il.archive.ubuntu.com/ubuntu/ kinetic main restricted
        2: deb http://il.archive.ubuntu.com/ubuntu/ kinetic-updates main restricted
        3: deb http://il.archive.ubuntu.com/ubuntu/ kinetic universe
        4: deb http://il.archive.ubuntu.com/ubuntu/ kinetic-updates universe
        5: deb http://il.archive.ubuntu.com/ubuntu/ kinetic multiverse
        6: deb http://il.archive.ubuntu.com/ubuntu/ kinetic-updates multiverse
        7: deb http://il.archive.ubuntu.com/ubuntu/ kinetic-backports main restricted universe mul
        tiverse
        8: deb http://security.ubuntu.com/ubuntu kinetic-security main restricted
        9: deb http://security.ubuntu.com/ubuntu kinetic-security universe
        10: deb http://security.ubuntu.com/ubuntu kinetic-security multiverse
        Active apt repos in: /etc/apt/sources.list.d/google-chrome.list
        1: deb [arch=amd64] https://dl.google.com/linux/chrome/deb/ stable main
        No active apt repos in: /etc/apt/sources.list.d/kubuntu-ppa-ubuntu-backports-jammy.list
        No active apt repos in: /etc/apt/sources.list.d/papirus-ubuntu-papirus-jammy.list
        Info:
        Processes: 197 Uptime: 7m Memory: 15.52 GiB used: 1.96 GiB (12.6%)
        Init: systemd v: 251 target: graphical (5) default: graphical Compilers:
        gcc: N/A Shell: Bash v: 5.2.2 running-in: konsole inxi: 3.3.21

        ​
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          #5
          which Graphics card are you using? The output says you have two. Does the same thing happen on both cards?

          Dave Kubuntu 20.04 Registered Linux User #462608

          Wireless Script: http://ubuntuforums.org/showthread.p...5#post12350385
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