Enabling GL driver makes all sorts of problems on a Pi 3!

Raspberry Pi 3B running freshly flashed Buster SD card. Graphics: Pi => hdmi-to-VGA => monitor. Pi and monitor are on same power strip. Both ... RaspberryPiStackExchangeisaquestionandanswersiteforusersanddevelopersofhardwareandsoftwareforRaspberryPi.Itonlytakesaminutetosignup. Signuptojointhiscommunity Anybodycanaskaquestion Anybodycananswer Thebestanswersarevotedupandrisetothetop Home Public Questions Tags Users Companies Unanswered Teams StackOverflowforTeams –Startcollaboratingandsharingorganizationalknowledge. CreateafreeTeam WhyTeams? Teams CreatefreeTeam Teams Q&Aforwork Connectandshareknowledgewithinasinglelocationthatisstructuredandeasytosearch. Learnmore EnablingGLdrivermakesallsortsofproblemsonaPi3! AskQuestion Asked 2years,8monthsago Modified 2years,7monthsago Viewed 6ktimes 4 Situation: RaspberryPi3BrunningfreshlyflashedBusterSDcard. Graphics:Pi=>hdmi-to-VGA=>monitor. Piandmonitorareonsamepowerstrip.Bothturnofftogetheroncepihasshutdown. Updated,upgradedandautoremoved.Nodpkgerrors. OpenGLwithfakeKMShasbeenenabledviaraspi-config. Rebooted. Problemsresult: mousepointerjumpingaroundwhenswitchingstates. MoreRAMused.(250MBinsteadof130MB.) Entirescreenfreezesatrandomtimes,evenwhenthereisplentyfreeRAMandcpuusageislow. Strangeartifactsappearsuchasthisone: Sometimesitincorrectlyguessesthescreenresolutiononboot(800x600insteadof1280x1024) Noticetheblackspaceontheleft,andcutoffontheright. Strangely,arebootdoesn'tfixit!Ihavetoshutdownandturnoffthepowerstripforthescreenresolutiontobecorrectnexttime. IattributealloftheaboveproblemstoopenGLbeingon,becausewhenitisoff,noneoftheseproblemshaveeveroccurred. Hasanyoneexperiencedanyoftheseproblemsbefore? Ifso,didyoufindanysolutionsbesidesturningopenGLoff? Ifnot,anyideaswhyIamtheonlyone? pi-3displayraspi-config Share Improvethisquestion Follow editedSep24,2019at1:27 Botspot askedSep2,2019at22:35 BotspotBotspot 1,57433silverbadges2525bronzebadges 14 Theincreasedmemoryfootprintisexpectedandthat'soneofthereasonstheydon'tsupportGLonaPiZero,buttheotherstuffweprobablyneedtotroubleshoot.Whenyougetthesquishedtextrequiringahardpowercycletofix,isglxinfostillreportingBroadcomV3DorbychanceareyouinthatGPUbadstatewhereitcanonlydosoftpipe?Also,whatdesktopmanageristhiswiththeWindowsiconinthebottomleftandall? – jdonald Sep11,2019at2:18 glxinfo:commandnotfoundIamusingRaspbian'sdefaultdesktopmanager,windowmanager,andeverythingelse,butusedlxappearancetochangethelookandfeel. – Botspot Sep11,2019at12:05 Hadtoinstallmesa-utilstorunglxinfo.Outputishere. – Botspot Sep11,2019at12:32 FirefoxSenddownloadisstuckhere:github.com/mozilla/send/issues/1397Canyouuseanalternativepastebin? – jdonald Sep11,2019at22:58 1 IfIhadtobetI'dsaypartoftheequationisthehdmi-to-VGAconnector,ie.,pluggedintoanactualHDMIdisplayyouwon'thavetheproblem. – goldilocks ♦ Sep12,2019at17:46  |  Show9morecomments 2Answers 2 Sortedby: Resettodefault Highestscore(default) Datemodified(newestfirst) Datecreated(oldestfirst) 2 Ihavereachedapartialsolutionforeachofmyoriginalpoints. Mousepointerjittering/bouncing/jumping/flickering:Noknown solution,butsome/boot/config.txtflagsmakeitmorenoticeable. MoreRAMused:Welltoobad,turnonswapifnecessary. Entirescreenfreezing:turnsoutitwasrelatedtolowvoltage,butonly occurredwhenGLwasturnedon. Strangeartifacts:Noideawhythishappens,itevenoccurredtwiceformeonunmodifiedBuster!Couldberelatedtolowvoltage,ormyinstallation. Incorrectscreenresolution:TurnsoutitwastheVGAadapter.NeverhappenedonceonmyHDMImonitor. Share Improvethisanswer Follow answeredSep15,2019at20:25 BotspotBotspot 1,57433silverbadges2525bronzebadges 1 AlsofoundoutthatthescreenandPibeingonthesamepowerstripcontributedtoincorrectscreenresolution.IfIpluginthescreen,thenpluginthePi5secondslater,itwouldauto-detecttheresolutioncorrectlyeverytime.AlsoexplainswhyslowerSDcardsneverhadthisproblem:thePitooklongertoboot,sothescreenhadtimetoinitialize. – Botspot Sep20,2019at12:12 Addacomment  |  1 +100 Pi=>hdmi-to-VGA=>monitor Keepinmindthatthisconversion: Mayinvolvealossofmeta-information/controlthatisotherwisepresentwithHDMI. Degradesthesignalintermsofstrength;withearliermodelPis,thathadasubparstrengthHDMIsignaltostartwith,somepeoplefoundsomeconvertersunusablebecauseofthis. Ifyoucombinethosetwofactors,itmightexplainwhyOGLcausesaproblem,especiallyifthecorrespondingGPUactivityaffectsthesignalstrengthand/orcharacteristics. Regardlessoftheexplanation,youcanrulethisinoroutbytryingdirectlywithanHDMImonitor. Share Improvethisanswer Follow answeredSep17,2019at23:08 goldilocks♦goldilocks 55.6k1616goldbadges105105silverbadges215215bronzebadges 1 Yes,(seemyanswer)usingahdmiscreengotridoftheincorrectresolution.Well,yougetthebounty! – Botspot Sep18,2019at3:11 Addacomment  |  YourAnswer ThanksforcontributingananswertoRaspberryPiStackExchange!Pleasebesuretoanswerthequestion.Providedetailsandshareyourresearch!Butavoid…Askingforhelp,clarification,orrespondingtootheranswers.Makingstatementsbasedonopinion;backthemupwithreferencesorpersonalexperience.Tolearnmore,seeourtipsonwritinggreatanswers. Draftsaved Draftdiscarded Signuporlogin SignupusingGoogle SignupusingFacebook SignupusingEmailandPassword Submit Postasaguest Name Email Required,butnevershown PostYourAnswer Discard Byclicking“PostYourAnswer”,youagreetoourtermsofservice,privacypolicyandcookiepolicy Nottheansweryou'relookingfor?Browseotherquestionstaggedpi-3displayraspi-configoraskyourownquestion. 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