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Thread: flickering screen

  1. #1
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    Default flickering screen

    what causes the screen to flicker when i scroll? This is on a laptop? It worked fine on Leap.
    Thanks,
    Ron

  2. #2
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    Default Re: flickering screen

    Quote Originally Posted by danorske View Post
    what causes the screen to flicker when i scroll? This is on a laptop? It worked fine on Leap.
    Thanks,
    Ron
    Which DE are you using? A likely graphics issue, so a good idea to publish your graphics card details to start with

    Code:
    /usr/sbin/hwinfo --gfxcard
    or
    Code:
    lspci -nnk |grep '\[03' -A
    Maybe your configured boot options too
    Code:
    cat /proc/cmdline

  3. #3
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    Default Re: flickering screen

    Quote Originally Posted by deano_ferrari View Post
    Which DE are you using? A likely graphics issue, so a good idea to publish your graphics card details to start with

    Code:
    /usr/sbin/hwinfo --gfxcard
    Model: "ATI RS780M [Mobility Radeon HD 3200]"

    or
    Code:
    lspci -nnk |grep '\[03' -A
    this code didn't work

    Maybe your configured boot options too
    Code:
    cat /proc/cmdline
    BOOT_IMAGE=/boot/vmlinuz-4.9.0-2-default root=UUID=5764feb8-1dfa-410e-8602-50b896e98db4 resume=/dev/sda5 splash=silent quiet showopts

  4. #4
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    Default Re: flickering screen

    [QUOTE/usr/sbin/hwinfo --gfxcard[/QUOTE]


    danorske@linux-0sme:~> /usr/sbin/hwinfo --gfxcard
    16: PCI 105.0: 0300 VGA compatible controller (VGA)
    [Created at pci.378]
    Unique ID: ul7N.fqdkMh7f9M7
    Parent ID: vSkL.QA_hbVWU301
    SysFS ID: /devices/pci0000:00/0000:00:01.0/0000:01:05.0
    SysFS BusID: 0000:01:05.0
    Hardware Class: graphics card
    Model: "ATI RS780M [Mobility Radeon HD 3200]"
    Vendor: pci 0x1002 "ATI Technologies Inc"
    Device: pci 0x9612 "RS780M [Mobility Radeon HD 3200]"
    SubVendor: pci 0x103c "Hewlett-Packard Company"
    SubDevice: pci 0x30fc
    Driver: "radeon"
    Driver Modules: "drm"
    Memory Range: 0xc0000000-0xcfffffff (ro,non-prefetchable)
    I/O Ports: 0x7000-0x70ff (rw)
    Memory Range: 0xd2400000-0xd240ffff (rw,non-prefetchable)
    Memory Range: 0xd2300000-0xd23fffff (rw,non-prefetchable)
    Memory Range: 0x000c0000-0x000dffff (rw,non-prefetchable,disabled)
    IRQ: 18 (472902 events)
    I/O Port: 0x00 (rw)
    Module Alias: "pci:v00001002d00009612sv0000103Csd000030FCbc03sc00i00"
    Driver Info #0:
    Driver Status: radeon is active
    Driver Activation Cmd: "modprobe radeon"
    Config Status: cfg=new, avail=yes, need=no, active=unknown
    Attached to: #26 (PCI bridge)

    Primary display adapter: #16
    danorske@linux-0sme:~>

  5. #5
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    Default Re: flickering screen

    Please enclose posted output within CODE tags. Refer to the '#' button in the editor, or manually add them if using NNTP.

  6. #6
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    Default Re: flickering screen

    Which desktop environment? (Gnome, KDE Plasma 5, ....)

  7. #7
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    Default Re: flickering screen

    While waiting for further advice from others, I've read a suggestion to use ' Option "TearFree" "on"' mentioned in the following pages
    https://wiki.archlinux.org/index.php/ATI
    https://cubethethird.wordpress.com/2...gpu-on-ubuntu/

    Create a custom config file /etc/X11/xorg.conf.d/20-radeon.conf and enter the following
    Code:
    Section "Device"
        Identifier "Radeon"
        Driver "radeon"
        Option "TearFree" "on"
    EndSection
    Restart the X-server when done, and observe the desktop behaviour again.

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