Max 3 v2.3 Neo Reader App: broken palm rejection and stray lines / disappearing ink
After the most recent firmware update, the Max 3 has completely broken palm rejection and broken writing on e-books.
Resting the palm on the screen while writing on a PDF causes the device to recognise a "pinching" action and to randomly zoom the screen in and out. The palm also sometimes highlights words and causes the dictionary definition to come up. Even worse, the zoom function becomes laggy and sometimes stays zooming in and out for 30 seconds after I have lifted my palm off the screen.
It is clear from these problems that palm rejection is very broken in this firmware version and it makes writing on e-books almost unusable.
The second problem is that when writing on an e-book, if a finger or small section of palm moves back and forth from the right edge of the screen (assuming you a right-handed) it causes the ink to create stray lines or the ink to disappear. This completely frustrates the writing process and makes writing on e-books almost unusable.
The two problems combined create a very buggy experience when writing on e-books.
This problem occurs with a full-size e-book or split screen e-book and note. It sometimes also occurs in the note writing app.
These issues are occurring on firmware build number: 2020-04-09_18-53_2_3_7c5d74f.
I have investigated further and it discovered the issue is only in the Neo Reader android app. This is definitely not a hardware issue.
I've reviewed the application logs when I reproduce the error and it seems Neo Reader has fault palm rejection as it detects electromagnetic touch input while the user is writing with the pen (hence palm is not rejected when pen is in use).
This causes the app to try and track the user's palm or edge of finger while the user is writing. When the palm is near the edge of the screen it causes a hit detection that fails which I believe results in an unexpected condition where the ink first disappears, the error of hit detection is handled and then the ink is drawn (or sometimes not drawn) but glitched by creating extra lines that were not drawn by the stylus.
You can see this occurring in the log below. Note the first error occurring in the neopdf app where "No selection -1, -1" appears. This error occurs when the edge of palm or edge of finger moves from edge of screen to off screen. Then notice how there are two events with waveform_mode = 255. I believe this is the electromagnetic touch waveform mode. Electromagnetic touch should not be registered while the user is writing, if palm rejection is working!
Finally, an attempt is made to render the ink that the user has drawn with the stylus but the result is glitched which creates one or more straight lines not drawn by the user (see waveform_mode = 2 near end of log).
This all seems to indicate that there are some severe bugs in the neopdf app causing these problems.
Please investigate these quickly as it is making the device unusable.
6-23 22:54:41.333 570 1892 E SurfaceFlinger: HandlePenTrigger, sid: -1 value is: 0 pid 0
06-23 22:54:42.511 570 570 I SurfaceFlinger: Post, sid: -1 current 0 value is: 1 pid 1976
06-23 22:54:42.512 570 2098 E SurfaceFlinger: Pen state change to value: 3 pid: 1976
06-23 22:54:42.512 570 2098 I SurfaceFlinger: Post, sid: -1 current 1 value is: 1 pid 1976
06-23 22:54:42.512 570 2098 E SurfaceFlinger: State changed!
06-23 22:54:42.515 1976 1976 I B : APN = __ ---> 5
06-23 22:54:42.520 1976 7290 E libneopdf: 2020-06-23 22:54:42.519 ERROR [7290] [Java_com_onyx_android_sdk_neopdf_NeoPdfNative_nativeHitTest@1046] No selection -1, -1
06-23 22:54:42.549 1976 7290 I B : RR LUD ---> 18
06-23 22:54:42.570 1976 7290 I B : RP D C P ---> 18
06-23 22:54:42.594 1976 7290 I B : RNP R N ---> 23
06-23 22:54:42.599 1976 7290 I B : RR: ---> 72
06-23 22:54:42.603 546 825 I SDM : update_to_display[0/1] -- marker[2946] waveform_mode = 255, update_mode = 0, Rect[0 0 2149 1650], flags = 0
06-23 22:54:42.736 1976 1976 I MVTH : L R : [R(0, 6 - 1650, 2142)]
06-23 22:54:42.736 1976 1976 I MVTH : E R : [R(1623, 447 - 1650, 527)]
06-23 22:54:42.740 570 2098 I SurfaceFlinger: Set limit region: (0 6) - (1650 2142)
06-23 22:54:42.743 570 2098 I SurfaceFlinger: Set exclude region: (1623 447) - (1650 527)
06-23 22:54:42.745 570 2098 E SurfaceFlinger: Pen state change to value: 2 pid: 1976
06-23 22:54:42.745 570 2098 E SurfaceFlinger: State changed!
06-23 22:54:42.749 1976 1976 I B : SRDEI = T ---> 14
06-23 22:54:43.976 570 2098 E SurfaceFlinger: Pen state change to value: 3 pid: 1976
06-23 22:54:43.976 570 2098 I SurfaceFlinger: Post, sid: -1 current 1 value is: 1 pid 1976
06-23 22:54:43.977 570 2098 E SurfaceFlinger: State changed!
06-23 22:54:43.979 1976 1976 I B : APN = __ ---> 5
06-23 22:54:43.986 1976 7290 E libneopdf: 2020-06-23 22:54:43.986 ERROR [7290] [Java_com_onyx_android_sdk_neopdf_NeoPdfNative_nativeHitTest@1046] No selection -1, -1
06-23 22:54:44.034 1976 7290 I B : RR LUD ---> 34
06-23 22:54:44.060 1976 7290 I B : RP D C P ---> 22
06-23 22:54:44.086 1976 7290 I B : RNP R N ---> 25
06-23 22:54:44.092 1976 7290 I B : RR: ---> 99
06-23 22:54:44.103 546 825 I SDM : update_to_display[0/1] -- marker[2947] waveform_mode = 255, update_mode = 0, Rect[0 0 2149 1650], flags = 0
06-23 22:54:44.205 1976 1976 I MVTH : L R : [R(0, 6 - 1650, 2142)]
06-23 22:54:44.206 1976 1976 I MVTH : E R : [R(1623, 447 - 1650, 527)]
06-23 22:54:44.209 570 2098 I SurfaceFlinger: Set limit region: (0 6) - (1650 2142)
06-23 22:54:44.212 570 2098 I SurfaceFlinger: Set exclude region: (1623 447) - (1650 527)
06-23 22:54:44.214 570 2098 E SurfaceFlinger: Pen state change to value: 2 pid: 1976
06-23 22:54:44.214 570 2098 E SurfaceFlinger: State changed!
06-23 22:54:44.218 1976 1976 I B : SRDEI = T ---> 13
06-23 22:54:44.224 655 762 E storaged: getDiskStats failed with result NOT_SUPPORTED and size 0
06-23 22:54:45.115 1976 7290 I B : ASBR: ---> 20
06-23 22:54:45.648 1976 7290 I B : RNP R N ---> 25
06-23 22:54:45.651 1976 7290 I B : NDRR: ---> 55
06-23 22:54:45.658 546 825 I SDM : update_to_display[0/1] -- marker[2948] waveform_mode = 2, update_mode = 0, Rect[1350 195 504 279], flags = 80000
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I have the same issue on a Note 2 both with NeoReader and the builtin KNotes application where while the stylus is hovering less than 1mm above the screen while resting my hand on it at the same time, the pinch-to-zoom is going crazy forcing me to have to completely turn off touch using the toolbar - which heavily slows down my workflow.
There is something very very wrong with the palm rejection on these devices at the moment. You should not need to enable/disable touch ever - it should just work as it does in other stylus equipped devices.
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RWX, try writing on an ebook in the NeoReader application somewhere near the right of the screen (assuming you are left handed) and moving your pinky finger (5th finger) on and off the right edge of the screen. Let me know if this causes either ink you've written to disappear (permanently or temporarily) or stray lines to be drawn on the page.
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With both pinch-to-zoom and pan enabled, I don't get the stray lines or disappearing ink in neoreader doing as you suggest, but do get the crazy touch behaviour. Either I'm not doing it in the same way, or the Note 2 doesn't have that particular issue.
It could be a hardware difference, as when I had both the Max 3 and Note 2 side by side and was testing both at the same time - I noticed that the Wacom hardware on the Max 3 was showing a lot of jitter (can easily see by zooming up) where the Note 2 had almost no jitter when testing with different Wacom branded pens. The Max 3 made my handwriting look a lot worse than it did so I kept the Note 2 and returned the Max 3.
For the pan and zoom issue while writing - PLEASE ONYX disable touch when the stylus is near the screen like all other devices I have ever used! It's such a simple thing to fix!
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I can report that the stray lines issue when the finger is on the side of the screen was fixed in v2.3.1 but there are still other situations that cause stray lines to appear and the ink to disappear. The palm rejection is also not fixed and as buggy as ever.
Please fix the stray lines, ink problems and palm rejection!
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