Jump to content

Latitude e7470: Big Sur issues, motherboard beeps, graphic glitches


robrub95

Recommended Posts

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

  • Administrators

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

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

  • Moderators

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

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

 

 

 

 

 

Schermata 2021-12-10 alle 14.36.18.png

https://opencore.slowgeek.com/?file=laptopskylake0668hR8HP&rs=laptopskylake066

 

Here's my sanity check

Link to comment
Share on other sites

×
×
  • Create New...