[LG V20 ROMs, Kernels, Recoveries, & Other Developm] lybxlpsv:
Also here's a long running issue since LineageOS 15.1 which I hope to get fixed.

AudioTrack errors out. Effects are intermittent. Games that uses AudioTrack will lag due to errors.

This still happens even if you disable audiofx.

Logcat

11-01 20:12:12.301 8521 8521 V MediaRouter: Selecting route: RouteInfo{ name=Headphones, description=null, status=null, category=RouteCategory{ name=System types=ROUTE_TYPE_LIVE_AUDIO ROUTE_TYPE_LIVE_VIDEO groupable=false }, supportedTypes=ROUTE_TYPE_LIVE_AUDIO ROUTE_TYPE_LIVE_VIDEO , presentationDisplay=null }
11-01 20:12:12.301 538 659 I EffectsFactory: EffectCreate() create_effect
11-01 20:12:12.305 1146 3120 I system_server: oneway function results will be dropped but finished with status OK and parcel size 4
11-01 20:12:12.311 688 1010 W AudioFlinger: checkEffectCompatibility_l(): non HW effect Equalizer on playback thread in fast mode
11-01 20:12:12.312 2954 4868 E AudioEffect: set(): AudioFlinger could not create effect 0bed4300-ddd6-11db-8f34-0002a5d5c51b / ec7178ec-e5e1-4432-a3f4-4657e6795210, status: -22
11-01 20:12:12.312 2954 4868 E AudioEffects-JNI: AudioEffect initCheck failed -3
11-01 20:12:12.312 2954 4868 E AudioEffect-JAVA: Error code -3 when initializing AudioEffect.
11-01 20:12:12.312 2954 4868 E AudioFx-EffectSet: error creatingEffectSet (AndroidEffects) [ mSessionId: 201 mDeviceInfo: android.media.AudioDeviceInfo@3e mGlobalEnabled: false ], releasing and throwing!
11-01 20:12:12.312 2954 4868 E AudioFxService: couldn't create effects for session id: 201
11-01 20:12:12.312 2954 4868 E AudioFxService: java.lang.RuntimeException: Cannot initialize effect engine for type: 0bed4300-ddd6-11db-8f34-0002a5d5c51b Error: -3
11-01 20:12:12.312 2954 4868 E AudioFxService: at android.media.audiofx.AudioEffect.<init>(AudioEffect.java:521)
11-01 20:12:12.312 2954 4868 E AudioFxService: at android.media.audiofx.AudioEffect.<init>(AudioEffect.java:488)
11-01 20:12:12.312 2954 4868 E AudioFxService: at android.media.audiofx.AudioEffect.<init>(AudioEffect.java:462)
11-01 20:12:12.312 2954 4868 E AudioFxService: at android.media.audiofx.Equalizer.<init>(Equalizer.java:139)
11-01 20:12:12.312 2954 4868 E AudioFxService: at org.lineageos.audiofx.backends.EffectSetWithAndroidEq.onCreate(EffectSetWithAndroidEq.java:39)
11-01 20:12:12.312 2954 4868 E AudioFxService: at org.lineageos.audiofx.backends.AndroidEffects.onCreate(AndroidEffects.java:53)
11-01 20:12:12.312 2954 4868 E AudioFxService: at org.lineageos.audiofx.backends.EffectSet.<init>(EffectSet.java:41)
11-01 20:12:12.312 2954 4868 E AudioFxService: at org.lineageos.audiofx.backends.EffectSetWithAndroidEq.<init>(EffectSetWithAndroidEq.java:34)
11-01 20:12:12.312 2954 4868 E AudioFxService: at org.lineageos.audiofx.backends.AndroidEffects.<init>(AndroidEffects.java:48)
11-01 20:12:12.312 2954 4868 E AudioFxService: at org.lineageos.audiofx.backends.EffectsFactory.createEffectSet(EffectsFactory.java:22)
11-01 20:12:12.312 2954 4868 E AudioFxService: at org.lineageos.audiofx.service.SessionManager$AudioServiceHandler.handleMessage(SessionManager.java:321)
11-01 20:12:12.312 2954 4868 E AudioFxService: at android.os.Handler.dispatchMessage(Handler.java:102)
11-01 20:12:12.312 2954 4868 E AudioFxService: at android.os.Looper.loop(Looper.java:223)
11-01 20:12:12.312 2954 4868 E AudioFxService: at android.os.HandlerThread.run(HandlerThread.java:67)

Screen Tearing issue on Dolphin-Emu and Citra-Emu. this does not happen on stock rom.

only happens when you tap the screen.

my suspicion is due to this thing.

https://github.com/LineageOS/android_device_lge_msm8996-common/blob/lineage-17.1/BoardConfigCommon.mk#L142

This has been removed on g6's WIP build branch so fingers crossed.

https://github.com/LG-G6-DEV/android_device_lge_msm8996-common/commit/39287018201bb6b2b66834148461cd72d8887221#diff-581794583e89a660d8f68651b78d17f9

I've put a detailed steps to reproduce here.

https://gitlab.com/LineageOS/issues/android/-/issues/2286