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symcbean
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Registered: ‎12-29-2016
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Yoga 510 - great with Linux apart from touchscreen

I've recently bought a 510-14AST and configured it dual boot with Fedora (25) Linux. So its running a recent kernel.

 

Everything works (sound, video - both with Xorg and wayland, network) apart from

  • the touchscreen
  • screen rotation
  • firewire

I can live without the screen rotation and firewire, but I would really like to get the touchscreen working.

 

But I am unable to divine anything about the touchscreen which might lead me to some sort of resolution. There is a mystery USB device (amd 0438:7900) which might relate to the touchscreen - but I'm unable to find any further details on this.

 

Under MSWindows, wacompen.sys appears in the drivers, but in Linux, the wacom and wacom_w8001 modules (v2.00) don't detect anything.

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Re: Yoga 510 - great with Linux apart from touchscreen

symcbean
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Location: GB
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Re: Yoga 510 - great with Linux apart from touchscreen

Some progress with this; under MSWindows it uses the bundled Microsoft touchscreen driver - so its not particularly esoteric hardware. Booting up in MSWindows and checking the Driver Manager also revealed that the device was connected to the i2c bus (as I suspected).

 

Under Fedora 25, dmesg shows a timeout error while scanning the i2c bus (and no touchscreen).

 

There have been a lot of changes to the i2c code in the last 3 years or so - so I tried some older versions of Linux. Ubuntu 15.10 (4.2 kernel) emitted a different set of errors about i2c, still no touchscreen. But with Ubuntu 14.04.5, the touchscreen works! Yay!!! But the wifi doesn't Smiley Sad(

 

The wifi is recognised as a ath10k_pci device in later Linuxen - this is available as backported source code, but I haven't had time yet to try and get this up and running with Ubuntu 14.04. Even though 14.04 is a LTS release, I would rather get everything working on a newer Linux so will try some other distros first.

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