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I'm not sure if it is a driver or a firmware issue, but something is not good. I noticed there was some changes in this driver to add support for some cheaps touchpads by adding quirks, but not mine.
This touchpad has fingerprint, but I,m quite sure that is not the problem because the fingerprint device is listed as usb device (us 001 Device 006: ID 27c6:5740) and the touchpad is in the pci/acpi/i2c bus:
As you've found already the device is not properly handled by the kernel, and the best way forward may be to bring it to the attention of a kernel developer raise by way of a kernel bug report. Sometimes, lack of vendor support can make this job difficult, so feel free to encourage Linux support from the vendor as well. BTW, the lspci and lsusb output is usually irrelevant for these inbuilt input devices as most are connected via I2c buses to an input device controller (i8042 device or similar).
Distribution: Debian testing/sid; OpenSuSE; Fedora; Mint
Posts: 5,524
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Cheap Chinese computing devices have frequent driver issues, because they use inexpensive components that lack driver support from the manufacturer. So, the computer manufacturers write their own drivers. These drivers are almost always poorly written, and only tested with the exact os and version shipped with the device. Some Android phones and tablets from Chinese manufacturers are not upgradeable.
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