Screen flicker (black screen) randomly.

[Ivan Diaz (PalBatey)]

Hi all, I have a vanilla install of LL 4.0 updated and upgraded and everything is working fine except for my screen that flickers randomly. I've had it flicker when adjusting the volume, entering Netflix or Youtube, etc. It seemed to be related to the video card, so I went ahead and downloaded and installed the latest AMD drivers for it. I also installed all of the codecs but it still flickering.
Any ideas?

Below is my hardware configuration:

System:    Host: BMW-LINUX Kernel: 4.15.0-22-generic x86_64
          bits: 64 gcc: 7.3.0
          Desktop: Xfce 4.12.3 (Gtk 2.24.31) Distro: Ubuntu 18.04.1 LTS
Machine:  Device: desktop Mobo: ASUSTeK model: P6T v: Rev 1.xx serial: N/A
          BIOS: American Megatrends v: 1408 date: 09/21/2010
CPU:      Quad core Intel Core i7 920 (-MT-MCP-)
          arch: Nehalem rev.5 cache: 8192 KB
          flags: (lm nx sse sse2 sse3 sse4_1 sse4_2 ssse3 vmx) bmips: 21382
          clock speeds: max: 2668 MHz 1: 1673 MHz 2: 1667 MHz 3: 2019 MHz
          4: 1807 MHz 5: 2023 MHz 6: 2040 MHz 7: 1796 MHz 8: 1730 MHz
Graphics:  Card: Advanced Micro Devices [AMD/ATI] Pitcairn XT [Radeon HD 7870 GHz Edition]
          bus-ID: 03:00.0
          Display Server: x11 (X.Org 1.19.6 )
          drivers: ati,amdgpu (unloaded: modesetting,fbdev,vesa,radeon)
          Resolution: [email protected]
          OpenGL: renderer: AMD Radeon HD 7800 Series
          version: 4.6.13540 18.40.2.15 Direct Render: Yes
Audio:    Card-1 Advanced Micro Devices [AMD/ATI] Cape Verde/Pitcairn HDMI Audio [Radeon HD 7700/7800 Series]
          driver: snd_hda_intel bus-ID: 03:00.1
          Card-2 Intel 82801JI (ICH10 Family) HD Audio Controller
          driver: snd_hda_intel bus-ID: 00:1b.0
          Sound: Advanced Linux Sound Architecture v: k4.15.0-22-generic
Network:  Card-1: Realtek RTL8111/8168/8411 PCIE Gigabit Ethernet Controller
          driver: r8169 v: 2.3LK-NAPI port: e800 bus-ID: 05:00.0
          IF: enp5s0 state: up speed: 100 Mbps duplex: full
          mac: e0:cb:4e:26:cd:4f
          Card-2: Ralink MT7601U Wireless Adapter
          driver: mt7601u usb-ID: 001-003
          IF: wlx24050f159417 state: N/A mac: N/A
Drives:    HDD Total Size: 4258.6GB (0.3% used)
          ID-1: /dev/sda model: ST32000542AS size: 2000.4GB
          ID-2: /dev/sdb model: WDC_WD2500JD size: 250.0GB
          ID-3: /dev/sdc model: WDC_WD20EADS size: 2000.4GB
          ID-4: USB /dev/sdd model: DataTraveler_2.0 size: 7.8GB
Partition: ID-1: / size: 96G used: 11G (12%) fs: ext4 dev: /dev/sdb5
RAID:      No RAID devices: /proc/mdstat, md_mod kernel module present
Sensors:  System Temperatures: cpu: 49.0C mobo: 47.0C gpu: 51.0
          Fan Speeds (in rpm): cpu: 2766 psu: 1591 sys-1: 0 sys-2: 927
Info:      Processes: 229 Uptime: 24 min Memory: 1622.4/11997.4MB
          Init: systemd runlevel: 5 Gcc sys: 7.3.0
          Client: Shell (bash 4.4.191) inxi: 2.3.56

[TheDead]

Hi,

I know its a crazy question but could it be the monitor or cable? :-S

Cheers!

[Ivan Diaz (PalBatey)]

No, cable is working fine. I also thought of that while troubleshooting.