robrub95 Posted December 6, 2021 Share Posted December 6, 2021 Hello everyone. I recently managed to install big sur on dell e7470 using the efi folder on this forum. When I connect it to an hdmi monitor the motherboard starts to emit long beeps intermittently and after some time of use with the monitor attached, everything starts to glitch; the computer graphics go to hell even though the rest continues to work and I have to reboot. Has anyone encountered the same problem? Link to comment Share on other sites More sharing options...
Administrators Hervé Posted December 6, 2021 Administrators Share Posted December 6, 2021 Sounds more like a hardware-related issue than anything else. Did you verify behaviour in, say, Windows? Link to comment Share on other sites More sharing options...
robrub95 Posted December 7, 2021 Author Share Posted December 7, 2021 No, i didn't, but dell diagnostic doesn't report any issue Link to comment Share on other sites More sharing options...
acquarius.13 Posted December 7, 2021 Share Posted December 7, 2021 I suppose it is something related to the igpu. If I understood correctly, I always have those kind of beeps in all of the 3 hacks that I have. For the record, the desktop one is the machine that particularly suffer of this issue. Link to comment Share on other sites More sharing options...
Administrators Hervé Posted December 7, 2021 Administrators Share Posted December 7, 2021 No such thing on my E7270 which is the E7470's little brother. Can you check your DVMT settings (through Grub shell as detailed here by Jake Lo) and post a zipped copy of your bootloader's EFI folder? Of course, detailing your system's specs in signature would be great too so that we know what hardware you have... Link to comment Share on other sites More sharing options...
robrub95 Posted December 8, 2021 Author Share Posted December 8, 2021 Good evening, I give you one more update. When the computer is not connected to the external monitor, it does not emit any sound, but yesterday, all of a sudden, the graphic glitch reappeared!. The problem is repeated systematically after a few hours of use: the mouse begins to slow down, the windows remain frozen and only by restarting the computer, everything returns as before and no problems. This is the efi i used I only removed the -v from the bootargs and update open core to 0.7.6 with the OCAT Link to comment Share on other sites More sharing options...
Moderators Jake Lo Posted December 8, 2021 Moderators Share Posted December 8, 2021 I don't have that issue on my E7470 using that same bootpack. My system stays on 24/7 unless it goes to sleep. You might want to try upgrading to latest BIOS. Check on your RAM and or hard disk. I'm using a broadcom wifi so if you're using an Intel wifi/BT, I don't know if that could be the cause as well. The kexts included for Intel are the latest version. Link to comment Share on other sites More sharing options...
robrub95 Posted December 9, 2021 Author Share Posted December 9, 2021 Bios already updated. Yes i'm using the intel wifi bluetooth but they work. This seems like a gpu crash. Is possible to put some kext that avoid this issue? Link to comment Share on other sites More sharing options...
Administrators Hervé Posted December 9, 2021 Administrators Share Posted December 9, 2021 If you use an Intel wireless card, why do you inject properties for Broadcom DW1820A in your OC config? You should remove that. Link to comment Share on other sites More sharing options...
robrub95 Posted December 10, 2021 Author Share Posted December 10, 2021 Sorry, i'm using the stock wifi card , i didm't change it. Is intel or Broadcom? From OCAT i've this error but is regarding audio: Original path: PciRoot(0)/Pci(0x1F,3) Path after internal conversion: PciRoot(0x0)/Pci(0x1F,0x3) DeviceProperties->Add[0]->DevicePath is borked! Please check the information above! CheckDeviceProperties returns 1 error! Completed validating /Volumes/EFI/EFI/OC/Config.plist in 3 ms. Found 1 issue requiring attention. I attach my config https://opencore.slowgeek.com/?file=laptopskylake0668hR8HP&rs=laptopskylake066 Here's my sanity check Link to comment Share on other sites More sharing options...
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