[drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe B FIFO underrun

[drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe B FIFO underrun


Hello there! I have upgraded to Kubuntu 20.04 from 19.10. Session went ok but after rebooting i noticed that my screen (external monitor connected via display port to my laptop) went on and off for 1-2 seconds. After the recent update to Kernel 5.4.0-40 these on and off instances are more frequent. System and sound etc works (doesn’t hang) , only the screen goes black and shows again, which is very annoying. This does not happen with HDMI cable connected, but instead there are some minor screen glitches, not very often though. I did not have any of those with 19.10…my system is details is shown below: Code: Operating System: Kubuntu 20.04 KDE Plasma Version: 5.18.5 KDE Frameworks Version: 5.68.0 Qt Version: 5.12.8 Kernel Version: 5.4.0-40-generic OS Type: 64-bit Processors: 8 × Intel® Core™ i5-10210U CPU @ 1.60GHz Memory: 15,5 GiB of RAM lspci Code: 00:00.0 Host bridge: Intel Corporation Device 9b61 (rev 0c) 00:02.0 VGA compatible controller: Intel Corporation UHD Graphics (rev 02) 00:12.0 Signal processing controller: Intel Corporation Comet Lake Thermal Subsytem 00:14.0 USB controller: Intel Corporation Device 02ed 00:14.2 RAM memory: Intel Corporation Device 02ef 00:15.0 Serial bus controller [0c80]: Intel Corporation Serial IO I2C Host Controller 00:16.0 Communication controller: Intel Corporation Comet Lake Management Engine Interface 00:17.0 SATA controller: Intel Corporation Comet Lake SATA AHCI Controller 00:1c.0 PCI bridge: Intel Corporation Device 02bc (rev f0) 00:1d.0 PCI bridge: Intel Corporation Device 02b0 (rev f0) 00:1d.1 PCI bridge: Intel Corporation Device 02b1 (rev f0) 00:1d.4 PCI bridge: Intel Corporation Device 02b4 (rev f0) 00:1f.0 ISA bridge: Intel Corporation Device 0284 00:1f.3 Audio device: Intel Corporation Device 02c8 00:1f.4 SMBus: Intel Corporation Device 02a3 00:1f.5 Serial bus controller [0c80]: Intel Corporation Comet Lake SPI (flash) Controller 01:00.0 PCI bridge: Intel Corporation JHL7540 Thunderbolt 3 Bridge [Titan Ridge 2C…

READ MORE: https://ubuntuforums.org/showthread.php?t=2446706&goto=newpost

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