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Latitude 3400: USB and Trackpad problems in Big Sur


tanya

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Hi,

 

22 hours ago, Jake Lo said:

Question: Did you select 'Reset NVRam' each time you made the changes

Sorry:  I didn't   

 

Now I copied  3400_12C_5  Reset nvram and reboot     but still no trackpad :-(

Should I retry your other options as well?  ( I'll do it anyway.... )

 

My  Dell 3400 has one other problem:   after a reboot or cold start the HDMI-port only works after taking it out and back into the Laptop,  and the HDMI-port doesn't survive a sleep-session. 

 

 

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updated to OC 0.64  and tried a  cheapo  USB3 to HDMI ( fresco logic, ali-exprss)   beside the buildin HDMI and USB-c to HDMI

Works!! 

I can drive 4 screens now with the Latitude 3400 ( 3 external & buildin)

 

:-)

 

dell_4screen.thumb.jpg.080d0a58cd19efd527aa7906ecf42d0d.jpg

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@Jorge1964, I have upgraded to OpenCore 0.64 but still no Trackpad. :-( I shall take a look at the EFI from davidfrei7as, hope that will solve it.... If I get it to work, I 'll post a EFI here. 

 

Edit:

@Jorge1964, Thanks for pointing my to davidfrei7as: his EFI is pure gold.

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