joe36547 Posted February 24, 2020 Share Posted February 24, 2020 Hi All Today I try install Catalina to my laptop(Latitude 7400). According to dennisc's successful Latitude 7400 EFI and Bronxteck fix 8265u stuck ApplePS2Mouse. But I found new problem. When going to apple install GUI. Backlight is low and hard to see any option. Is any way to fix this error? Thank you. Link to comment Share on other sites More sharing options...
Moderators Jake Lo Posted February 24, 2020 Moderators Share Posted February 24, 2020 Try Fn + B or Fn + F12 Link to comment Share on other sites More sharing options...
joe36547 Posted February 25, 2020 Author Share Posted February 25, 2020 Fn+B or Fn+F12 not work. But I find simple to fix. Close laptop (not shutdown) and reopen up , screen backlight is work. Finally I install OS X to SSD. But reboot again and stuck there "**In Memory Panic Stackshot Succeeded** Byte Traced 17296** Attempting system restart..." loop again and again. I try find some solution, but no idea to fix.Is my setting wrong? Please help me. Attach file is this time use EFI. Thanks you. EFI.zip Link to comment Share on other sites More sharing options...
joe36547 Posted February 27, 2020 Author Share Posted February 27, 2020 Update I remove DSDT.aml finally boot in Catalina. And copy kext to L/E result as blew: [Work] CPU:15-8265U whiskylake Identified (GPU HD620 work) Camera Keyboard (All function can work) Sound (need copy kext to L/E can work?) Battery [Not Work] DW1820 (not DW1820A) is simple. I will replace with DW1820A. Trackpad (can move and gestures but can't click ) My question how to fix trackpad can't click and button work? VoodooI2C not support? Link to comment Share on other sites More sharing options...
Moderators Jake Lo Posted February 27, 2020 Moderators Share Posted February 27, 2020 known issue as Latitude 7490 from Hervé's guide Link to comment Share on other sites More sharing options...
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