[Avita NS14A2] Screen doesn't display on warm boot and turning on after Suspend (i915 0000:00:02.0: [drm] *ERROR* failed to enable link training)

[Bipul Harsh]

I have Avita NS14A2 laptop where i dual boot windows 10 and Ubuntu 20.04. In past few days might be after installing updates I am facing issue where my screen dont display at all when i first boot it and after multiple force shut down and then boot in it work, even on doing Suspend and then opening it, screen didnt not display for about 5-6 minutes, and then shows login screen.

On checking logs software i got these line on those time stamp when display doesnt shows

this is the line:

(Hardware) i915 0000:00:02.0: [drm] *ERROR* failed to enable link training

this line continues for about 30-40 times on average during time when screen doesnt display anything on turing on. So I think there is some issue with it.

As I primarily use Ubuntu 20.04 so didnt check it with windows 10

but on doing cold boot it didnt even shows the boot menu where i can choose between Ubuntu 20.04 and Windows 10.

But once screen starts displaying i dont see that error in logs software anymore and screen doesnt freezes or hangs. It only happen when i either open after suspend or do cold boot.

Please consider this issue on urgent basis, as it takes a lot of time and efforts to make screen display something. :(

And please let me know whether I should do fresh installation of ubuntu 20.04 again.

Sorry for any grammatical mistakes. :)

Thank you,
Bipul Harsh
<email address hidden>

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: xorg 1:7.7+19ubuntu14
ProcVersionSignature: Ubuntu 5.8.0-50.56~20.04.1-generic 5.8.18
Uname: Linux 5.8.0-50-generic x86_64
ApportVersion: 2.20.11-0ubuntu27.16
Architecture: amd64
BootLog: Error: [Errno 13] Permission denied: '/var/log/boot.log'
CasperMD5CheckResult: skip
CompositorRunning: None
CurrentDesktop: ubuntu:GNOME
Date: Fri Apr 23 20:36:38 2021
DistUpgraded: Fresh install
DistroCodename: focal
DistroVariant: ubuntu
ExtraDebuggingInterest: Yes
GraphicsCard:
 Intel Corporation UHD Graphics 620 [8086:5917] (rev 07) (prog-if 00 [VGA controller])
   Subsystem: Intel Corporation UHD Graphics 620 [8086:5917]
InstallationDate: Installed on 2020-11-22 (151 days ago)
InstallationMedia: Ubuntu 20.04.1 LTS "Focal Fossa" - Release amd64 (20200731)
MachineType: AVITA NS14A2
ProcEnviron:
 LANGUAGE=en_IN:en
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_IN
 SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.8.0-50-generic root=UUID=011d61ba-ef72-40ed-9957-25830622d9c7 ro quiet splash vt.handoff=7
SourcePackage: xorg
Symptom: display
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 04/19/2019
dmi.bios.release: 0.22
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: BSR5IPHK-14UF80-AVI-V22
dmi.board.asset.tag: Default string
dmi.board.name: 6614UFWC80
dmi.board.vendor: AVITA
dmi.board.version: Default string
dmi.chassis.asset.tag: Default string
dmi.chassis.type: 10
dmi.chassis.vendor: AVITA
dmi.chassis.version: Default string
dmi.ec.firmware.release: 0.22
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrBSR5IPHK-14UF80-AVI-V22:bd04/19/2019:br0.22:efr0.22:svnAVITA:pnNS14A2:pvrDefaultstring:rvnAVITA:rn6614UFWC80:rvrDefaultstring:cvnAVITA:ct10:cvrDefaultstring:
dmi.product.family: CN6614
dmi.product.name: NS14A2
dmi.product.sku: CN6614F56U1IN-MB
dmi.product.version: Default string
dmi.sys.vendor: AVITA
version.compiz: compiz N/A
version.libdrm2: libdrm2 2.4.102-1ubuntu1~20.04.1
version.libgl1-mesa-dri: libgl1-mesa-dri 20.2.6-0ubuntu0.20.04.1
version.libgl1-mesa-glx: libgl1-mesa-glx 20.2.6-0ubuntu0.20.04.1
version.xserver-xorg-core: xserver-xorg-core 2:1.20.9-2ubuntu1.2~20.04.2
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:19.1.0-1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917+git20200226-1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.16-1

[Bipul Harsh (bhworld)]

One more thing if the logs containing any sensitive information please do let me know so i can remove those file.

Thank You

[Bipul Harsh (bhworld)]

I also change the display scale to 125% in display section in ubuntu setting

[Ubuntu Kernel Bot (ubuntu-kernel-bot)]

This change was made by a bot.