HL-R36H-V21 Rumble motor always on solutions: Does the dtb file fix have any issues?
Just installed a rumble motor into my V21 r36h and had the rumble motor always on problem. After doing some research, there were two main fixes for the problem - replacing the rk3326-r35s-linux DTB with a modified one OR modifying the hardware to account for the changes with the v21 revision. My main question is: are there any known problems with the dtb file fixes that would warrant the use of a hardware related fix instead?
I tried a couple of the dtb fixes - with the seemingly widely accepted one (for r36s, at least) here by u/djparent not working for the r36h - I used the dtb file hosted here, mentioned by u/Wivi2013 in the comments of this post. Although I haven't tested in-game, this fix works flawlessly after a short vibration during bootup and during testing in the controller tester (L3+R3).
For the hardware fixes, there is a couple, they seem rather difficult and require some electronics knowledge and soldering skills. There is one by u/wandyt in the comments of this post, but more importantly there is a Youtube Video and webpage detailing multiple hardware fixes for both the r36s and r36h, however, criticising the .dtb file fixes as they (supposedly) reduce the output of the voltage regulator from 3.3 to 1.8 volts. They noted that this affects the delivery of power to the wifi chip, however in my short experience the wifi chip I just installed is working fine. They didn't check any other issues regarding power delivery, however raised three concerns, the main one being undervolting the RK3326 or the RK817-1 power delivery chip and subsequently causing damage over the long term. These concerns, however, have no real substance to them, and I was wondering if anyone in the community has had serious issues (performance losses, device damage, etc.) with the dtb fixes.
Any input would be greatly appreciated, much love to the amazing community we have here :)
Edit: Note: I have tested some performance with the new and old dtb, using FPS in Ratchet and Clank: Size Matters for PSP and Crash Bandicoot for PSX (on fast forward), resulting in no noticable difference. This, says to me, that the power to the RK3326 with the new dtb must be unaffected as the chip (with my humble electronics knowledge, take this with a grain of salt) would have to reduce clock speeds to account for the undervoltage, hence reducing perfomance.