whatnameisit Posted November 17, 2019 Share Posted November 17, 2019 (edited) I have a Toshiba laptop with NVidia 315M which in Windows has 512 Mb of memory and allows backlight configuration. In HS, the memory size is down to 256 Mb and the backlight does not change. I had followed the guide below and got the slider enabled (but as the slider did not work I changed a couple of things.) Also the display icon on the menu bar is shown as external display and so it stays there unless I remove it. Any thoughts please? Send me Toshibaui-MacBook-Pro.zip Edited June 16, 2020 by whatnameisit Link to comment https://www.insanelymac.com/forum/topic/341223-solved-315m-memory-size-and-backlight/ Share on other sites More sharing options...
whatnameisit Posted November 23, 2019 Author Share Posted November 23, 2019 VRAM size override by _DSM or Devices/Properties or AddProperties VRAM,totalsize 512 in data format. Link to comment https://www.insanelymac.com/forum/topic/341223-solved-315m-memory-size-and-backlight/#findComment-2698361 Share on other sites More sharing options...
whatnameisit Posted June 16, 2020 Author Share Posted June 16, 2020 Use AppleBacklightFixup.kext to fix brightness control. Set IOProbeScore as explained in https://github.com/acidanthera/WhateverGreen/blob/master/Manual/FAQ.OldPlugins.en.md In SSDT-PNLF provided in WhateverGreen, change the ACPI path of the iGPU device accordingly Link to comment https://www.insanelymac.com/forum/topic/341223-solved-315m-memory-size-and-backlight/#findComment-2725820 Share on other sites More sharing options...
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