MobileRead Forums - View Single Post - PW4 Touchscreen software driver/hardware Issue with PW4

CaesarW · 12-30-2018, 01:27 AM

Hey everyone!

Recently I purchased a Kindle PW4 from a local shop and was really joyful to see the new kindle right out of the box. As a routine after my jailbreak, I tested typing from the kterm keyboard, and soon discovered the key 'P' and '[' were quite often mistyped. For example, when typing 'unzip abc.zip', if you don't pay special attention to your typing, it's very likely to be 'unzi[ abc.zi['.

I dived further into the issue and launched xtestlab126 in my terminal, and I discovered that on the right side of the screen, when I draw a line down the screen, the track on the screen would be a bit righter compared to my finger's physical track.The issue occurs especially near the place where the key 'P ; . [ ↑ ↓ ←' are located, the track drifted about 2mm.

So that explained why the keys listed are so easily mistyped. Meaning that if you touch on the righter part of the key 'P' on the keyboard, the drift will bring you to '[' on the keyboard. I've contacted Amazon to have my Kindle replaced and they accepted. After getting another *new* Kindle, I jailbroke it, and did the same test. The issue remains.

Now I'm posting this on the forum to ask if you guys who had a PW4 have the same issue? Or anyone help to test out if your PW4 has the same issue?Just can't be sure if this is a display manufacturing issue (hardware) or a touchscreen driver issue (software).

My hardware & software info:
Device: Kindle Paperwhite 4 with serial starting with G000.
Firmware: 5.10.1.2 jailbroken

I'll post the video reproduction of the issue later on the forum.

Thanks everyone for help!

12-30-2018, 01:27 AM	#1
CaesarW Linux enthusiast Posts: 26 Karma: 20 Join Date: Aug 2017 Location: Somewhere in the universe Device: PW3 PW4 (all jb)	Touchscreen software driver/hardware Issue with PW4 Hey everyone! Recently I purchased a Kindle PW4 from a local shop and was really joyful to see the new kindle right out of the box. As a routine after my jailbreak, I tested typing from the kterm keyboard, and soon discovered the key 'P' and '[' were quite often mistyped. For example, when typing *'unzip abc.zip', if you don't pay special attention to your typing, it's very likely to be 'unzi[ abc.zi['. I dived further into the issue and launched xtestlab126* in my terminal, and I discovered that on the right side of the screen, when I draw a line down the screen, the track on the screen would be a bit righter compared to my finger's physical track.The issue occurs especially near the place where the key 'P ; . [ ↑ ↓ ←' are located, the track drifted about 2mm. So that explained why the keys listed are so easily mistyped. Meaning that if you touch on the righter part of the key 'P' on the keyboard, the drift will bring you to '[' on the keyboard. I've contacted Amazon to have my Kindle replaced and they accepted. After getting another new Kindle, I jailbroke it, and did the same test. The issue remains. Now I'm posting this on the forum to ask if you guys who had a PW4 have the same issue? Or anyone help to test out if your PW4 has the same issue?Just can't be sure if this is a display manufacturing issue (hardware) or a touchscreen driver issue (software). My hardware & software info: Device: Kindle Paperwhite 4 with serial starting with G000. Firmware: 5.10.1.2 jailbroken I'll post the video reproduction of the issue later on the forum. Thanks everyone for help!