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Need a nonexistant driver for my fingerprint reader on a lenovo laptop running ubuntu 20.04

Go to solution Solved by Nayr438,

You could take a look at these

https://gitlab.freedesktop.org/libfprint/libfprint/-/issues/173

https://gitlab.collabora.com/ao2/goodix_fp_dump

 

If the device is read as a usb device by lsusb, you can use wireshark to dump the data in Windows (simplest method), otherwise you can capture data with Wireshark on the host by monitoring the VM.

 

Creating device drivers or sending raw data in general to a device tends to result in dead hardware, its not advisable to develop drivers for a device you are currently using and depend on but to rather purchase a cheap low grade device that you don't mind dying during testing and development.

So I made my Lenovo flex 14 API dual boot with a instance of ubuntu 20.04, and the win10 it came with. Now I'm trying to get the fingerprint reader to work, but after some research I realised that a driver for this fingerprint reader 

 

https://linux-hardware.org/index.php?id=usb:27c6-55b4

 

Does not have a driver. So I am stuck with either waiting for someone else to make one, or do it myself. But I've never made a driver. So Can someone give me a starting ground for it. 

 

Also, I'm not sure whether this should go here or in programming, but every time I've had a moderator move a thread, it instantly died, sooo.

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There would have to be a lot of reverse engineering work to build you own driver, of both the fingerprint reader and Ubuntu. I have memories of hearing a few months back that Lenovo was working with Canonical to build in fingerprint support but I could be crazy and it could be for a different device. I think you best bet is to cross you fingers and wait.

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Well, I'm supposed to be a comp science major, so even if i fail at this, I'd figured that it'll be a good learning experience. And I doubt it, Lenovo still ships their computers with locked bios, so you have to buy their hardware to upgrade your computer. Doesn't sound like a company that likes linux's open nature

 

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Just now, linuxfur said:

 

What did you expect? No OEM is going to cater towards Linux until it's used more widely in desktop environments.

Did I say I expected something different? Why do you think I want to develop a driver for it instead of waiting

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2 minutes ago, Benji said:

Well, de facto Ubuntu has built-in fingerprint support already, but there just aren't any drivers. Lenovo wants to "commit to releasing Linux drivers for ThinkPad devices" IIRC, but haven't they been saying that for a long time already? Not to mention that this specific fingerprint scanner only seems to be used in this specific Lenovo Flex 14API, IdeaPad S540/740, IdeaPad C340/640/740 and apparently also in ThinkPad L13, E490 and E590. Since it is in lower-end ThinkPads there might be a small chance that we'll get to see drivers, but I wouldn't really count on it.

again, this is why I want to build the driver myself, can someone just point me to sources on how to revers engineer the device/os, I know this'll be a long and hard project. But I want to try

 

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-> Moved to Linux, macOS and Everything Not-Windows

^^^^ That's my post ^^^^
<-- This is me --- That's your scrollbar -->
vvvv Who's there? vvvv

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You could take a look at these

https://gitlab.freedesktop.org/libfprint/libfprint/-/issues/173

https://gitlab.collabora.com/ao2/goodix_fp_dump

 

If the device is read as a usb device by lsusb, you can use wireshark to dump the data in Windows (simplest method), otherwise you can capture data with Wireshark on the host by monitoring the VM.

 

Creating device drivers or sending raw data in general to a device tends to result in dead hardware, its not advisable to develop drivers for a device you are currently using and depend on but to rather purchase a cheap low grade device that you don't mind dying during testing and development.

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