Hello, I tried installing Windows Server 2019 and 2022 on my laptop but both have the same problem, the touchpad is not working. After a lot of different things tried, I am almost sure the problem is the lack of a correct hidi2c.sys driver, as in normal Windows I have a driver called "I2C HID Device", which uses the hidi2c.sys and mshidkmdf.sys. On a normal Windows installation, Windows automatically installs this hidi2c.sys and then 3 other devices show up. "Microsoft Input Configuration Device", "ELAN HID Class Filter Device" and "ELAN PrecisionTouchpad Filter Driver". If I uninstall the hidi2c.sys on normal Windows, then the other 3 devices are gone, just like on Windows Server, until I reinstall it. Windows Server has the mshidkmdf.sys, but not the hidi2c.sys. I have another laptop which uses an ELAN Touchpad, but it's not connected via AMD I2C, so I am guessing that's why it works. I only found a thread which documents this problem a bit, on eevblog (www dot eevblog dot com/forum/general-computing/windows-server-default-driver-broken/). All other devices work fine, like GPU and Wi-Fi. The OS is installed as secondary OS on my laptop, so I can try suggestions. Thanks.
Zitat von ExtremeGrief im Beitrag #1Hello, I tried installing Windows Server 2019 and 2022 on my laptop but both have the same problem, the touchpad is not working.
Hi, I had the same problem as you with the Windows Server 2019 regarding the I2C touchpad. YOU DO NOT NEED TO DISABLE SIGNING! This is for Synaptic device!
It seems that Windows "forgot" to install hidi2c.sys service. You will have to do this manually:
Find hidi2c.sys on the Win2019 installation media in boot.wim (should be in windows\system32\drivers, use 7zip to open wim). Copy that file to c:\windows\system32\drivers. The inf file is already present at c:\windows\inf (Windows server 2019 does not allow INF installation for this I2C device)
Then you need to manually install the driver in Registry.
Download PSEXEC, extract it to System32. Open a CMD as administrator and type: psexec -s -i cmd.exe You are NOW NT Authority, you can modify sensitive areas in Registry. Backup the registry if you want.
Save the following 4 registy configs as files.
Import the following 4 reg files into the registry with command: reg import file.reg (as NT Authority)
For me the touchpad still not working in Advanced mode in Windows Server 2022 even with this fix, but in Basic mode it works fine with and without this fix
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Mon Oct 25, 2021 11:24 pm
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