Claude fixed my computer (disabled problematic dimming issue)
一位技术娴熟的用户长期被英特尔显卡驱动中的DPST（显示电源节能技术）自动调光问题困扰。该功能在屏幕背景亮时使其更亮，暗时更暗，用户尝试了多种方法，包括检查Windows设置、安装英特尔显卡软件、禁用传感器服务以及修改注册表中的`FeatureTestControl`值，但均未成功。最终，用户向AI助手Claude求助，并授权其自行解决问题。…
I'm pretty tech savvy, but this DPST auto-dimming and auto-brightening was driving me crazy. Claude actually gave itself admin control and edited my registry directly itself after I told it to do whatever it took to fix it.
The annoying "feature" built into intel drivers for some odd reason does the opposite of what is expected: when the screen background is bright, it makes it even brighter, blinding you, and then when the screen background is dark, it makes it even dimmer so you can't see anything. Whoever programmed this "feature" is an idiot.
Anyway, I tried all the usual hacks, after confirming the issue was caused by Intel DPST (Display Power Saving Technology), not by Lenovo Vantage or software.
- I added two versions of Intel Graphics software: "Intel Graphics Command Center (Beta)" and "Intel Graphics Software", and tried disabling anything related. Didn't work.
- I tried checking Device Manager to see if there was anything there I could disable. There wasn't.
- Then I looked for FeatureTestControl in the Registry at `Computer\HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control\Class\{4d36e968-e325-11ce-bfc1-08002be10318}\0000` and tried changing via the forum hacks: go to 0000 and set `FeatureTestControl` to `9250`. Didn't work.
- Another forum said go to 0001 and do it. But 0001 was mostly blank and didn't have it. I tried adding the DWORD manually, but that didn't work either.
Finally after another couple days of major annoying and frequent blinding whites, I went to Claude Cowork and told it "I don't care what you have to do, just fix my computer and disable this DPST, I hate it!"
Claude (Opus) got to work. It started checking the registry, searching the internet, and then opened a shell to give itself admin permissions so it could change the registry. It found the source within a few minutes.
I had recently switched my m.2 drive from my previous laptop to this one, which is the same laptop model but with double the ram and double the cpu (double TDP). When I had swapped it in, Windows ran a driver update which reinstalled the graphics driver. After this, that old DPST issue was back, although I had previously solved it on my previous laptop.
What happened that is unusual is because 0000 and 0001 were taken from the other hardware, Windows reinstalled the graphics driver in the next available slot, 0002.
I was on the right track but without more sleuthing I would not have known that in my case I needed to set `FeatureTestControl` to `1210` for my particular device. Opus confirmed that `1200` was ON while `1210` was OFF for the DPST, and that the current setting had been `1200`, causing the issue.
Opus was able to solve this and directly modify my computer including granting itself admin permissions with a momentary powershell window which opened for a split second.
After a reboot, DPST hell is over. I tested with an all white image and all black image, and there is no more dimming when going back and forth. Problem solved!
p.s. before letting Claude go free I backed up the registry. I understood the risks and it paid off this time.