latitude 3340 black screen at boot

[Benidiktus]

Hi,

 

i use dell latitude 3340 with el capitan 10.11.5 for a couple month. almost work stable even with parallel desktop windows 10. But sometimes i get stuck black screen after bar loading start. I cant do anything except to hold the power off. Power up again and everything normal again. I ofter get the black screen expecially when the fist boot.

 

there is no apple logo at boot screen, it just bar loading with a glitch image but after loading bar complete login screen was perfect.

 

i used clover 3340 as recommend in this thread. is there any solution to fix this bug?

[Hervé]

Try and repair kexts permissions then rebuild your cache.

[Benidiktus]

could you suggest the best way how to repair permission and rebuild cache?

i know about run repair permission but i dont know about rebuild cache

[Jake Lo]

     sudo chmod -Rf 755 /L*/E*

      sudo chown -Rf 0:0 /L*/E*

      sudo touch -f /L*/E*

      sudo chmod -Rf 755 /S*/L*/E*

      sudo chown -Rf 0:0 /S*/L*/E*

      sudo touch -f /S*/L*/E*

      sudo kextcache -Boot -U /

 

You should go ahead and update to the latest Clover