Big Sur on ASUS VivoBook X512! Sleep, webcam, keyboard backlight, and brightness key issues.

Big Sur on ASUS VivoBook X512! Sleep, webcam, keyboard backlight, and brightness key issues.

Upgraded RAM from base soldered 4GB SODIMM DDR4 to 8GB

Camera is detected as a USB video device, but doesn't output

Surprisingly vibrant matte screen, bearable deck-flex, good size trackpad and keyboard, all sub-$500!

INFO:
CPU: Ice Lake 1005G1

GPU: UHD G1 integrated graphics 1536MB DVMT

FB: 01005C8A (0x8A5C0001) (Same as OC guide for Ice Lake, except added bit for driving an external display)

Boot args: -igfxcdc -igfxdvmt keepsyms=1 debug=0x100 alcid=21

Updated to Big Sur from Catalina, as my Wi-Fi card isn't natively supported and I couldn't find a full-install Big Sur image. The most challenging parts of this build (so far) were determining the correct alcid value for my Realtek codec and finding a proper framebuffer patch.

As mentioned in the title, my webcam is registering as a video device but doesn't actually output anything. I fiddled with the preset settings in OBS, to no avail. My keyboard backlight doesn't work, and neither do my display brightness keys (but brightness can be changed via control center). I get a sleep/wake panic when closing and reopening the lid, when the machine enters sleep, and sometimes when the screensaver is activated. I haven't gone through and patched my DSDT yet but any advice on the above issues would be greatly appreciated, as I've never done something like that before.

I initially posted for help with 3D acceleration but Reddit anti-spam flagged my post multiple times. Thanks to the mods here for their help with that, and to anybody willing to help!

submitted by /u/ARadioActivePigeon
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