troorl Posted October 12, 2017 Share Posted October 12, 2017 I've been trying High Sierra on my laptop with the same bootpack as I use for Sierra. Everything seems to work except for the touchpad. But there is a very strange problem. Upon booting the system turns brightness to zero. The only way to see anything is to press Fn+F3 and then Fn+Up. I don't know why, but that's how it works. And after that it switches to zero by itself every 20 seconds. I've already seen the same issue on Sierra few times, but I fixed it with reboot. This time reboot doesn't help. I tried my backup Sierra to make sure it's not a hardware problem. I also checked the power saving setting. Have you guys encountered something like that? How do I even diagnose it? Link to comment Share on other sites More sharing options...
Moderators Jake Lo Posted October 12, 2017 Moderators Share Posted October 12, 2017 Open config file with Clover Configurator, under System Parameter, put 0 in Backlight Level If still not working, try 0x0306 Also make sure to run permission fix and rebuild cache Link to comment Share on other sites More sharing options...
troorl Posted October 12, 2017 Author Share Posted October 12, 2017 Wow, it really helped! Thank you! Also thank you for the tip about FixHeaders_20000000 from some other thread. Link to comment Share on other sites More sharing options...
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