Ubuntu

A strip of my touch screen on my Meizu MX4 is not responding

Asked by Paul Weaver

I suspect this is a hardware issue, but I'd be interested in how to diagnose.

I've got a new Meizu MX4 with the latest stock Ubuntu installed and up-to-date. It was working flawlessly for about a week, but now some touch events are not working. Most notably, scrolling something like a web page there is a pause as my finger traverses across a ~1cm high horizontal strip of the screen (i.e. that strip doesn't seem to respond to my finger at all during the scroll).

I can't touch the password box on the terminal to enter a password very reliably, and neither can I touch the "delete" option on images, for example.

Opening up "cut the rope", which gives some nice visual touch feedback, I can see the same thing - there's a strip across the middle of the screen that doesn't seem to register touch events.

So, how do I diagnose what's up?

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actionparsnip (andrew-woodhead666) said : 		#1

Is it possible to boot an older kernel on the phone? If so try that but it does sound like a hardware issue

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Paul Weaver (x-paul-c) said : 		#2

I would be up for trying that - can you provide a set of steps for doing that? I've got a Linux Mint laptop available if I need a host to upload the replacement kernel from.

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Paul Weaver (x-paul-c) said : 		#3

Some more information: I just updated to 15.04 r4, and it appeared after restart to have solved the issue! I ended up hard power cycling the phone for an unrelated reason and now its back. Is there a way to downgrade back to r3, and do the upgrade again to see if this resolves the issue, or if it's just a very strange coincidence?

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actionparsnip (andrew-woodhead666) said : 		#4

I'd test it for a while. It may just be "one of those things".

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