prynhart Posted November 21, 2020 Share Posted November 21, 2020 (edited) Hello, I'm wanting to post on the thread referenced inline below, but I don't have enough rights to do so. Maybe someone so post a cross reference/link for me, otherwise I guess I could try tagging @Donw35 directly: Firstly, the work of @Donw35 just looks awesome. I am able to get full compatibility between Catalina and my HP 800 G1 SFF if I use a single display (via the top onboard DisplayPort connector). As soon as I add a second monitor (again just using the onboard iGPU, i.e. the Intel HD 4600 but via the 2nd, lower Display port connector), I am getting a reproducible kernel panic every boot, just at the point where macOS normally tries/switches from the text mode boot to the Apple logo. (I'm in verbose mode - so this is quite far through the boot sequence, nearly to the point where the logon/window manager usually appears.) I'm getting this behaviour both with HP_800_G1_OC063.zip and earlier EFI build HP_800_G1_OC_58.zip. I'm also on the latest BIOS for the board, which is v02.78 I would quite like my dual monitor setup - so for the time being I have gone back to High Sierra. (I know that my hardware is fine because I've been on 10.13 on the HP 800 G1 for some time and have had no issues on the dual monitor setup.) Is there someone who can please help with this issue - would quite like to move to a newer version of macOS, but I guess there's no huge rush. Thanks in Advance, Patrick Edited November 21, 2020 by prynhart Add thread I'm referencing Quote Link to comment https://www.insanelymac.com/forum/topic/345828-problem-with-dual-monitors-and-catalina-on-hp-800-g1-sff/ Share on other sites More sharing options...
prynhart Posted November 21, 2020 Author Share Posted November 21, 2020 Thanks @Hervé - if I were to upload a ZIP of my current (working) EFI for High Sierra do you think you might be able to have a look at it ? I actually just used this prebuilt Clover environment with very minor tweaks via Clover Configurator (just to set the processor type to Haswell and the Graphics to HD4600): https://hackintosher.com/guides/high-sierra-install-full-guide/. Cheers Patrick Quote Link to comment https://www.insanelymac.com/forum/topic/345828-problem-with-dual-monitors-and-catalina-on-hp-800-g1-sff/#findComment-2745015 Share on other sites More sharing options...
prynhart Posted November 21, 2020 Author Share Posted November 21, 2020 Thanks so much! Working on it! Really appreciate the help. BTW: Have been on a 2012 MacMini for years prior to this, but the performance that you get on this HP 800 G1 is significantly better (and so much cheaper!) Cheers Patrick Quote Link to comment https://www.insanelymac.com/forum/topic/345828-problem-with-dual-monitors-and-catalina-on-hp-800-g1-sff/#findComment-2745017 Share on other sites More sharing options...
prynhart Posted November 21, 2020 Author Share Posted November 21, 2020 @Hervé: For the file (tar with gzip) EFI_Folder_macOS13_WorksBeautifullyWithEitherASingleOrDualMonitorConf_NoKernelPanics: https://drive.google.com/uc?export=download&id=1nfGBhjDTD2d-S-KWqSkb3zIMIcyUHEcZ For the file (tar with gzip) EFI_Folder_macOS15__WorksBeautifullyWithASingleMonitor_CrashesEverySingleTimeInADualMonitorConf: https://drive.google.com/uc?export=download&id=1vuWkHos-56e1rwdMLrEpq11dcdlIGT-g Quote Link to comment https://www.insanelymac.com/forum/topic/345828-problem-with-dual-monitors-and-catalina-on-hp-800-g1-sff/#findComment-2745019 Share on other sites More sharing options...
prynhart Posted November 21, 2020 Author Share Posted November 21, 2020 Yeah - 10MB limit though, and 17MB for the Clover based (10.13) Folder though. Quote Link to comment https://www.insanelymac.com/forum/topic/345828-problem-with-dual-monitors-and-catalina-on-hp-800-g1-sff/#findComment-2745021 Share on other sites More sharing options...
prynhart Posted November 21, 2020 Author Share Posted November 21, 2020 Ah right - sorry @Hervé. The new guy gets it wrong. Anyway - so we've got no real reason why there should be a spontaneous reboot in the case of the macOS 15 setup ? If so - I might need the help of @Donw35. It's reproducible every time - unplugging the second display and everything is perfect under Catalina. Plug it back in and game over. Ah @Hervé - Looks like you edited your post after I replied. There wasn't this sentence when I replied: "Add the ACPI patches of your High Sierra config to your OpenCore config, especially the renaming from GFX0 to IGPU." Now there is. Okay - something for me to follow up on. Cheers Patrick Quote Link to comment https://www.insanelymac.com/forum/topic/345828-problem-with-dual-monitors-and-catalina-on-hp-800-g1-sff/#findComment-2745024 Share on other sites More sharing options...
prynhart Posted November 21, 2020 Author Share Posted November 21, 2020 (edited) The software used for this forum is a bit ..... unusual. If I "Submit a Reply" to my own post, it seems to duplicate the entire previous post that I made. Weird - I guess maybe I'm supposed to Edit the last existing post (rather than Reply to my own post ?) Edit: Except that time! Must be client side I guess, but I'm just using Safari (as shipped with macOS 10.13) Edited November 21, 2020 by prynhart Quote Link to comment https://www.insanelymac.com/forum/topic/345828-problem-with-dual-monitors-and-catalina-on-hp-800-g1-sff/#findComment-2745025 Share on other sites More sharing options...
prynhart Posted November 21, 2020 Author Share Posted November 21, 2020 Thanks again @Hervé! Quote Link to comment https://www.insanelymac.com/forum/topic/345828-problem-with-dual-monitors-and-catalina-on-hp-800-g1-sff/#findComment-2745027 Share on other sites More sharing options...
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