[LG V20 Questions & Answers] Tần Quảng:
I am using LG V20 F800K, Android 8.

Recently, I decided to uninstall system apps with pm uninstall to make my phone work better. However, after uninstalling I don't know what wrong apps I uninstalled, my second screen didn't show anything (black screen), I went to settings -> Show display -> Second screen settings. The setting is still normal, I tried disabling all the option in the second monitor settings then re-enabling it but the second screen still showed nothing (including the signature).

My second monitor wasn't broken, it still displayed normally before I uninstalled system apps.

Here is a list of application packages I removed:

pm uninstall --user 0 com.lge.vrplayer
pm uninstall --user 0 com.android.egg
pm uninstall --user 0 com.google.android.ext.services
pm uninstall --user 0 com.google.android.ext.shared
pm uninstall --user 0 com.google.android.apps.photos
pm uninstall --user 0 com.google.android.apps.maps
pm uninstall --user 0 com.lge.theme.blackgold
pm uninstall --user 0 com.android.bluetoothmidiservice
pm uninstall --user 0 com.android.bookmarkprovider
pm uninstall --user 0 com.android.stk
pm disable-user --user 0 com.lge.task
pm uninstall --user 0 com.lge.touchcontrol
pm uninstall --user 0 com.lge.quicktools
pm uninstall --user 0 com.android.managedprovisioning
pm uninstall --user 0 com.android.calllogbackup
pm uninstall --user 0 com.lge.lgdmsclient
pm uninstall --user 0 com.lge.appbox.client
pm uninstall --user 0 com.lge.musicshare
pm uninstall --user 0 com.lge.smartsharepush
pm uninstall --user 0 com.android.chrome
pm uninstall --user 0 com.lge.nextcapture
pm uninstall --user 0 com.google.android.tts
pm uninstall --user 0 com.lge.roamingsettings
pm uninstall --user 0 com.lge.signaturewallpaper
pm uninstall --user 0 com.lge.ime.solution.handwriting
pm uninstall --user 0 com.kt.android.showtouch
pm uninstall --user 0 com.google.android.apps.cloudprint
pm uninstall --user 0 com.android.backupconfirm
pm uninstall --user 0 com.android.cts.ctsshim
pm uninstall --user 0 com.android.cts.priv.ctsshim
pm uninstall --user 0 com.android.providers.partnerbookmarks
pm uninstall --user 0 com.android.sharedstoragebackup
pm uninstall --user 0 com.android.wallpaperbackup
pm uninstall --user 0 com.lge.entitlementcheckservice
pm uninstall --user 0 com.lge.icecontacts
pm uninstall --user 0 com.lge.lgdrm.permission
pm uninstall --user 0 com.lge.musiccontroller
pm uninstall --user 0 com.lge.provider.yellowpage
pm uninstall --user 0 com.lge.smartshare.provider
pm uninstall --user 0 com.lge.sui.widget
pm uninstall --user 0 com.lge.upsell
pm uninstall --user 0 com.qualcomm.atfwd
pm uninstall --user 0 com.qualcomm.qcrilmsgtunnel
pm uninstall --user 0 com.qualcomm.qti.radioconfiginterface
pm uninstall --user 0 com.android.companiondevicemanager
pm uninstall --user 0 com.google.android.configupdater
pm uninstall --user 0 com.android.wallpaper.livepicker
pm uninstall --user 0 com.lge.myplace.engine
pm uninstall --user 0 com.crucialsoft.fido.client
pm uninstall --user 0 com.android.vending
pm uninstall --user 0 com.google.android.gms
pm uninstall --user 0 com.lge.drmservice
pm uninstall --user 0 com.android.bips
pm uninstall --user 0 com.android.nfc
pm disable-user --user 0 com.lge.sizechangable.weather.platform
pm uninstall --user 0 com.google.android.syncadapters.contacts
pm uninstall --user 0 com.lge.easyhome
pm uninstall --user 0 com.lge.eltest
pm uninstall --user 0 com.lge.email
pm uninstall --user 0 com.lge.exchange
pm uninstall --user 0 com.facebook.system
pm uninstall --user 0 com.facebook.appmanager
pm uninstall --user 0 com.crucialsoft.asm
pm uninstall --user 0 com.crucialtec.uaf
pm uninstall --user 0 com.lge.formmanager
pm uninstall --user 0 com.lge.lgfota.permission
pm uninstall --user 0 com.lge.gcuv
pm uninstall --user 0 com.google.android.gm
pm uninstall --user 0 com.lge.gnss.airtest
pm uninstall --user 0 com.lge.gnsstest
pm uninstall --user 0 com.google.android.googlequicksearchbox
pm uninstall --user 0 com.google.android.backuptransport
pm uninstall --user 0 com.google.android.apps.docs
pm uninstall --user 0 com.google.android.onetimeinitializer
pm uninstall --user 0 com.google.android.music
pm uninstall --user 0 com.google.android.videos
pm uninstall --user 0 com.google.android.talk
pm uninstall --user 0 com.lge.ime.solution.tshanja
pm uninstall --user 0 com.lge.theme.highcontrast
pm uninstall --user 0 com.lge.gallery.vr.wallpaper
pm uninstall --user 0 com.lge.video.vr.wallpaper
pm uninstall --user 0 com.android.LGSetupWizard
pm uninstall --user 0 com.lge.googleinapps
pm uninstall --user 0 com.android.statementservice
pm uninstall --user 0 com.android.settingsaccessibility
pm uninstall --user 0 com.lge.privacylock
pm uninstall --user 0 com.android.facelock
pm uninstall --user 0 com.lge.drive.activator
pm uninstall --user 0 com.ktpns.pa
pm uninstall --user 0 com.lge.hiddenmenuko
pm uninstall --user 0 com.lge.twophone
pm uninstall --user 0 com.kt.wificm
pm uninstall --user 0 com.lge.cic.eden.service
pm uninstall --user 0 com.lge.mlt
pm uninstall --user 0 com.lge.remote.lgairdrive
pm uninstall --user 0 com.lge.remote.setting
pm uninstall --user 0 com.lge.sync
pm uninstall --user 0 com.lge.leccp
pm uninstall --user 0 com.lge.gnsspostest
pm uninstall --user 0 com.lge.ims
pm uninstall --user 0 com.lge.bnr
pm uninstall --user 0 com.lge.bnr.launcher
pm uninstall --user 0 com.lge.wifi.p2p
pm uninstall --user 0 com.lge.wfds.service.v3
pm uninstall --user 0 com.lge.lgdmprovisioningclient
pm uninstall --user 0 com.lge.maagent
pm uninstall --user 0 com.lge.lgmapui
pm uninstall --user 0 com.lge.vragent
pm uninstall --user 0 com.lge.wernicke
pm uninstall --user 0 com.lge.ia.task.informant
pm uninstall --user 0 com.qualcomm.location
pm uninstall --user 0 com.lge.krlogservice
pm uninstall --user 0 com.android.providers.blockednumber
pm uninstall --user 0 com.android.mtp
pm uninstall --user 0 com.lge.smartshare
pm uninstall --user 0 com.lge.cloudhub
pm uninstall --user 0 com.wsandroid.suite.lge
pm uninstall --user 0 com.lge.mirrorlink
pm uninstall --user 0 com.lge.app.floating.res
pm uninstall --user 0 com.lge.NfcSettings
pm uninstall --user 0 com.android.htmlviewer
pm uninstall --user 0 com.lge.music
pm uninstall --user 0 com.android.hotwordenrollment.okgoogle
pm uninstall --user 0 com.lge.onehandcontroller
pm uninstall --user 0 org.codeaurora.btmultisim
pm uninstall --user 0 com.lge.ota
pm uninstall --user 0 com.lge.coneshortcut
pm uninstall --user 0 com.google.android.printservice.recommendation
pm uninstall --user 0 com.android.printspooler
pm uninstall --user 0 com.evernote.promohelper
pm uninstall --user 0 com.qualcomm.qti.qmmi
pm uninstall --user 0 com.qualcomm.location.XT
pm uninstall --user 0 com.lge.qhelp
pm uninstall --user 0 com.uei.lg.quicksetsdk.irblaster
pm uninstall --user 0 com.lge.wernicke.nlp
pm uninstall --user 0 com.lge.mtalk.sf
pm uninstall --user 0 com.gd.mobicore.pa
pm uninstall --user 0 com.qapp.secprotect
pm uninstall --user 0 com.lge.servicemenu
pm uninstall --user 0 com.lge.iftttmanager
pm uninstall --user 0 com.lge.smartdoctor.webview
pm uninstall --user 0 com.lge.intelligent
pm uninstall --user 0 com.lge.ia.task.smartsetting
pm uninstall --user 0 com.lge.snappage
pm uninstall --user 0 com.lge.android.atservice
pm uninstall --user 0 com.lge.srtc
pm uninstall --user 0 com.lge.theme.superbatterysaving
pm uninstall --user 0 com.lge.hotspotprovision
pm uninstall --user 0 com.qualcomm.svi
pm uninstall --user 0 com.android.hotwordenrollment.tgoogle
pm uninstall --user 0 com.google.android.feedback
pm uninstall --user 0 com.lge.lgaccount
pm uninstall --user 0 com.google.android.apps.docs.editors.docs
pm uninstall --user 0 com.google.android.marvin.talkback
pm uninstall --user 0 com.android.apps.tag
pm uninstall --user 0 com.android.inputdevices
pm uninstall --user 0 com.lge.inputdevices
pm uninstall --user 0 com.google.android.apps.work.oobconfig
pm uninstall --user 0 com.android.emergency
pm uninstall --user 0 com.lge.sizechangable.musicwidget.widget
pm uninstall --user 0 com.google.android.apps.docs.editors.sheets
pm uninstall --user 0 com.google.android.apps.docs.editors.slides
pm uninstall --user 0 com.lge.videostudio
pm uninstall --user 0 com.google.android.setupwizard
pm uninstall --user 0 com.lge.updatecenter
pm uninstall --user 0 com.android.providers.userdictionary
pm uninstall --user 0 com.lge.tdmb
pm uninstall --user 0 com.lge.conerecent
pm uninstall --user 0 com.lge.myplace
pm uninstall --user 0 com.android.location.fused
pm uninstall --user 0 com.lge.videoplayer
pm uninstall --user 0 com.lge.voicecare
pm uninstall --user 0 com.qualcomm.wfd.service
pm uninstall --user 0 com.android.hotwordenrollment.xgoogle
pm uninstall --user 0 com.google.android.youtube
pm uninstall --user 0 com.ktshow.cs
pm uninstall --user 0 com.kt.ktmenu
pm uninstall --user 0 com.kt.serviceagent
pm uninstall --user 0 com.kt.olleh.storefront
pm uninstall --user 0 com.skt.skaf.OA00018282

Please show me the package I have removed which affects the second screen.

Thanks.