neitys
Posts: 3
Joined: Fri Sep 18, 2015 9:44 am

New Display - Cursor Jumps and Clicks all over the place

Fri Sep 18, 2015 9:51 am

Hi,

I've done several installs, tried several powering methods, and everything is great, except once I get into the GUI, the touch screen just goes bananas and clicks and jumps all over the place and I either have to cntrl-alt-f2 out or wrestle it to reboot. Anybody else have this issue? Anyone have any idea why?

scotty101
Posts: 2987
Joined: Fri Jun 08, 2012 6:03 pm

Re: New Display - Cursor Jumps and Clicks all over the place

Fri Sep 18, 2015 12:36 pm

Have you done a rpi-update?

It may be related to the issue that was reported a few days ago.
Electronic and Computer Engineer
Pi Interests: Home Automation, IOT, Python and Tkinter

neitys
Posts: 3
Joined: Fri Sep 18, 2015 9:44 am

Re: New Display - Cursor Jumps and Clicks all over the place

Fri Sep 18, 2015 1:40 pm

I did, but it was doing it already. Also I ran that test thing where you select an input device and this is before I go into X, and it's picking up everything and anything and nothing at all as input. If I put my hand near it goes crazy, if I walk away it's OK for a sec, then how's bouts of crazy every 5 seconds or so.

gsh
Raspberry Pi Engineer & Forum Moderator
Raspberry Pi Engineer & Forum Moderator
Posts: 1284
Joined: Sat Sep 10, 2011 11:43 am

Re: New Display - Cursor Jumps and Clicks all over the place

Fri Sep 18, 2015 1:48 pm

I'd suggest checking the connections to the touchscreen and display conversion board, it does sound like you've got noise from a ground loop or floating ground being pulled into the touchscreen circuit.

I assume you don't have any other hardware wired up? Also try changing the power supply wiring

Gordon
--
Gordon Hollingworth PhD
Raspberry Pi - Director of Software Engineering

neitys
Posts: 3
Joined: Fri Sep 18, 2015 9:44 am

Re: New Display - Cursor Jumps and Clicks all over the place

Fri Sep 18, 2015 2:05 pm

I absolutely would agree with you about the ground loop, I know what kind of black magic evil they can create in power distribution systems first hand, but I don't see it.

Power supply options I've tried:
GPIO w/ power to Pie
GPIO w/ power to Display
GPIO w/ power to Display, using dual (2 male to 1 female) y-USB cord from 4.4A adapter
Power to display, then power out to display
Two cords from dual output 4.4A adapter
Totally independent power supplies (2.4A blackberry charger deals)

Have reformatted, redownloaded, and rechecked SHA1 5 times for Raspbian


Also, went into raspi-ft4560-overlay.dtb (or whatever the file is), used DTC to convert it to DTS,
got output looking normal except that firmware = <0xDEADBEEF> ????? That seemed odd.


Tried having screen attached, fresh install, sudo apt-get update upgrade

Tried having screen not attached, fresh install sudo apt-get update upgrade then attach screen.


The pi board, display, and adapter are all connected with metal standoffs together, also tried letting pi "float"

Also, re-seated all connectors at least 3 times. Reseated DSI connector at least half a dozen times.


....Display looks great though!

gsh
Raspberry Pi Engineer & Forum Moderator
Raspberry Pi Engineer & Forum Moderator
Posts: 1284
Joined: Sat Sep 10, 2011 11:43 am

Re: New Display - Cursor Jumps and Clicks all over the place

Fri Sep 18, 2015 2:09 pm

If it is any connection problem it'll be the touch screen connector (the small 6 pin one).

If that doesn't fix it, then I think it's got to be a test escape so send it back to where-ever you bought it

Gordon
--
Gordon Hollingworth PhD
Raspberry Pi - Director of Software Engineering

RobotChicken
Posts: 2
Joined: Mon Dec 28, 2015 10:10 pm

Re: New Display - Cursor Jumps and Clicks all over the place

Mon Dec 28, 2015 10:16 pm

Experiencing the same issue. Once I provided enough power to run the display and the pi it started acting funny.

At first when connected I had a crappy enercell usb cord that didn't allow enough power for both display and pi, so it displayed a low voltage symbol and the touch didn't work. Once I gave it enough power, the low voltage symbol went away, but the cursor started acting crazy.

When you disconnect the touch chip/ribbon the cursor acts normally (but touch doesn't work of course).

I'm not sure if this is a power issue, or what. The cursor both jumps around and 'clicks' on stuff, seemingly opening random stuff at the top of that window. Its possessed!

RobotChicken
Posts: 2
Joined: Mon Dec 28, 2015 10:10 pm

Re: New Display - Cursor Jumps and Clicks all over the place

Mon Dec 28, 2015 10:35 pm

I figured it out. It was a power issue.

I was using an ANKER 40W 5 port 8A USB charger at first, which has some sort of tech inside that is supposed to detect the power requirements and supply as needed. Theoretically it could supply 2.4+ amps per port (I even had one port powering the RPi and one pwering the display at one point), but the cursor jumped around clickin on stuff.

As soon as I hooked the jumpers back up and powered the whole rig from a 5.1V 2.1amp iPad wall wart the screen started acting normally.

Weird.

gtoal
Posts: 94
Joined: Sun Nov 18, 2012 12:02 am

Re: New Display - Cursor Jumps and Clicks all over the place

Mon Dec 28, 2015 11:56 pm

Interesting. I had the same issue yesterday and I use the same PSU. And today, two of the five ports on the PSU are dead.

Until I read your postings, my theory had been that it was a wireless interference issue with the iHome wireless keyboard & mouse - seemed worse whenever the mouse was close to the display.

(I'm forced to use a hardware keyboard because of the pcmanfm 100% CPU issue from using matchbox-keyboard)

G

JimmyN
Posts: 1109
Joined: Wed Mar 18, 2015 7:05 pm
Location: Virginia, USA

Re: New Display - Cursor Jumps and Clicks all over the place

Tue Dec 29, 2015 12:56 pm

I saw the same behavior when I hooked the display interface to my bench lab supply, so I could see how sensitive it was to low voltage. Dropping a tenth of a volt at a time the screen itself worked fine down to 3.3V (I didn't go any lower), but when going below 3.6V the touch became erratic and the cursor started jumping all over the screen.

If the cursor landed on an icon it would highlight it, then the next jump would sometimes move the icon to a new location, and it was starting applications on it's own. Increase the voltage to more than 3.6V and everything returned to normal.

lilgman
Posts: 8
Joined: Wed Nov 04, 2015 2:26 pm
Location: Lesotho, Africa

Re: New Display - Cursor Jumps and Clicks all over the place

Tue Dec 29, 2015 7:56 pm

I have this same problem when I plug my pi's power supply into a cheap inverter. It does seem that a "dirty" power supply can cause this.

RexRoper
Posts: 64
Joined: Wed Oct 31, 2012 4:45 pm
Location: South Florida
Contact: Website

Re: New Display - Cursor Jumps and Clicks all over the place

Fri Jan 01, 2016 3:14 pm

There is no need to call an Exorcist! :)
I was experiencing this same problem when powering my unit from my PC USB Port... not good. The demons and evil spirits would bounce the cursor all around, opening apps and closing the ones I had open!

I moved my power cable to a powered USB Hub that is rated 5VDC 2.5A which is also running my RPi NAS setup for storing videos from my RPi Cameras. I am using my 7" display unit to log into my RPi Cameras using Empathy Browser and it R-O-C-K-S!!...now that the demons are gone. All I need now is my PiJuice thingy and my 7" display unit will be a full blown mobile tablet.

Bouncing cursor on the 7" Display?? check your power, then check your power, if that does not work then check your power.

9aed
Posts: 17
Joined: Wed Sep 24, 2014 11:49 pm

Re: New Display - Cursor Jumps and Clicks all over the place

Sun Mar 13, 2016 10:27 pm

This behaviour still seems to haunt the display. The device that arrived here exhibits quite similar state of non-functionality. Things tried so far: different Raspberry Pi models: B+, B2, B3 and for the last tests (below) A+, different power supply configurations and power supplies. All tests were executed with recent software (Feb 2016 releases of Raspbian, clean installs + current updates before tests, default environment). And yes, the narrow touch display cable and other cables were re-seated and verified to be properly positioned.

Some comment writers tend to regard this as a power source problem. In some cases it could be, but there might be reasons to search other root causes. After fighting to get the device to work with otherwise quite good USB regulators (2.1A Goobay), 2 different USB power supplies connected individually to RPi and display (with or without ground connection), USB3 hub and even a cheap Chinese-sourced KSZ-3R33S -based PSU (3A, according to some data, not verified, though), a Kenwood PAE 32-3W laboratory power bench supply was tried, capable of delivering clean 4A current. No indication of bad power supply was seen. In fact, measuring with bench supply indicated currents peaking just under 1A and usually remaining even below 460 mA for the whole combination.

Fault exhibits itself at time intervals of variable length, during which the touch display generates all kinds of activity, mainly on left side of the screen and during which time it is unresponsive to any click, tab or drag. Sometimes the unresponsiveness continues after this self-activation ends.

A program was used to count mouse events during these fault periods. Results are attached below. Each 3-number set contains 1) time in seconds marking the start of fault condition, measured from start of program, 2) length of mouse event generating period and 3) number of events generated during the period. 2 runs were made, each recording for 3 hours. During this time nothing touched the display and program was running remotely. Only connected peripheral was a wlan stick, but the results were quite similar, when an external keyboard and mouse were connected either directly (B series devices) or through a USB hub (A+). On-screen virtual keyboard was unusable, since it kept defocusing and shifting itself. A launcher icon on display could not be used, since the device tended to grab it immediately after boot and kept either holding or hiding it.

1st test, laboratory bench supply, with sense lines wired directly to +5/GND connector pins of the display and short lines used to deliver the same voltage to A+ GPIO header pins 4 and 6. Correct 5V supply verified with (admittedly a cheap Peaktech 1070) multimeter. Result:

Code: Select all

    0  26   986		 7788	1     7		 9582	0     5
  222	1     8		 7795	1     2		 9588	9   228
  247	4   123		 7799	2    37		 9599	3    50
  321	2    40		 7803  36  1054		 9604	6   161
  327	2    56		 7841	4    83		 9612	4    19
  359	0    51		 7847	2    41		 9621	1    12
  864	1    15		 7852	9   173		 9625	2    17
  895	3    37		 7864	0    11		 9629	1    13
  900	9   179		 7867	0     4		 9644	4    41
  911	2    28		 7869  12   214		 9650	0    22
  915  43  1320		 7883  13   245		 9652	7    63
  962	1    48		 7898  24   495		 9661	0     2
  969  26   597		 7924	3    61		 9663	2    70
  997	6    67		 7965	1    70		 9679	0     4
 1005  35  1075		 8068	0    29		 9681	0     3
 1513	4   160		 8631  18   700		 9683	5    47
 1621	0     6		 8731  10   343		 9691	3    76
 1673	1    14		 8757  12   371		 9696	0     3
 1930	0     8		 8773	1    23		 9699	0     7
 2045	8   287		 8881	0     2		 9701	3    45
 2105	1    10		 8884	0     7		 9734	2    28
 2155	1    39		 8886	0     9		 9739	1     9
 2186	5    95		 8888	7   129		 9742	3    50
 2577	8   260		 8901	0    11		 9749	6   110
 2589	0     4		 8904  17   508		 9769	0    10
 2731	2    89		 8924	0    21		 9778	1    14
 2943	6   178		 8926  27   656		 9786	1    37
 2956	6   168		 8955	1     6		 9789	0     5
 2975	4   150		 8958	0     7		 9791	0     7
 2989	6   263		 8960	6    92		 9793	0    18
 3700	0     2		 8968  14   494		 9799	0     5
 3740	2    53		 8984  17   526		 9801	0     2
 3755	2    70		 9005	3    64		 9804	0    19
 3822	3   143		 9010	3    87		 9806	2    41
 3920  12   522		 9015	6   238		 9810  14   178
 4088	1    10		 9023	0     4		 9827	0     5
 4185	1    47		 9026	0    13		 9832  21   534
 4189	2    60		 9028	7    95		 9855	1    21
 4433	1    39		 9052  12   275		 9858	1    30
 4440	2    27		 9066	2    37		 9865	5    62
 4621	1    15		 9072	0    13		 9872	1     6
 4815	1     3		 9074  50  1465		 9875	0     5
 4889	2    54		 9126  23   708		 9877  10   245
 5495	1    42		 9151	7    94		 9889	4    42
 5569	8   281		 9160	3    72		 9901	0    29
 6023	0     8		 9165  15   220		 9906	3    23
 6047	1    67		 9183  41  1254		 9911  38  1183
 6248	0     6		 9226	8   138		 9951	0    23
 6254	5   209		 9237	5    76		 9953  12   319
 6261	0    13		 9245  19   472		 9967	1    40
 6490	5   213		 9268	3    43		 9970	0     4
 6539	4   159		 9299	0     7		 9976  40  1265
 6551	5   160		 9313	0     3		10018	1    20
 6858	5   188		 9337	0     3		10021	3    70
 7019	5   192		 9375	1     4		10027	5   188
 7167	0     6		 9387	0     2		10035 266  8745
 7173	0     8		 9402	0     4		10303	0     2
 7175	4   129		 9428	0     6		10306  31   754
 7243	0     5		 9436	1     9		10339  31   652
 7429	1    39		 9439	0    19		10372  86  2949
 7436	3    54		 9447	1    33		10460	0     2
 7441	5    62		 9455	3    52		10462  10   201
 7448	0     2		 9466	0    13		10474 103  3328
 7453	7    23		 9468	5    75		10579  18   467
 7462	4    36		 9498	0    21		10599	2    23
 7665	0     9		 9519	0    19		10603	5    68
 7668	0     2		 9531	2    18		10610	3    77
 7672	7   160		 9542	1    10		10615	8   186
 7681	4    97		 9546	0     8		10625  14   350
 7702	1    15		 9549	0     5		10642  27   717
 7724	0     7		 9553	0     5		10671	6   124
 7752	0     2		 9563	5    31		10679  14   411
 7776	1    20		 9575	1     8		10696 470 13113
 7785	1    42		 9580	0     5		11171	4   152
After this test a cold boot was executed, which was convenient, since the device had at some point selected the shutdown option from main menu. It had not itself yet clicked it, though.

2nd test, a Goobay USB PSU powering the display directly and providing the A+ through official jumper wires connecting the display to GPIO pins 4 and 6. Result:

Code: Select all

    0 216  6401		 1407	6   220		 6467	4   207
  223	0     7		 1836	1    44		 6654	0     3
  259	4   156		 1985	0    19		 7478	7   252
  274	5   198		 2343	2    78		 7488	0    21
  326	2    76		 2769	2    49		 7517	5   182
  336  70  2437		 2903	1    68		 7526	7   279
  408  67  2207		 3011	0    19		 7610	1    60
  477	0    16		 3257	0    12		 7613	1    20
  481	2    22		 3424	0    16		 7706	2   120
  485	8    99		 3622	1    47		 7763	0     3
  496	0     8		 3632	3   154		 7919	2   121
  498	0     2		 3716	2    67		 8133	3   129
  504	1    17		 4039	0     2		 8455	0    17
  507	0    19		 4200	3   119		 8575	0     2
  509	0     6		 4338	3    97		 8632	2    99
  512  12   300		 4870	1    25		 8806	1    26
  526	4    57		 5096	1    35		 9130	0     7
  532	7   128		 5161	0    21		 9403	0     2
  541	6   100		 5260	9   384		10064  19   768
  549	2    10		 5489	2   118		10107	7   273
  557	0    10		 5864	0     7		10123	0    11
  561	0     6		 5950	3   135		10308	1    18
  591	1    13		 6236	1    20		10388	0     5
  615	0     6		 6316	0    39		10520	5   213
 1257	4   122		 6329	0    17		11013	1    58
 1295	2    74
During this thest the device opened the main menu various times, but did not select anything to run and finally managed to close the menu.

As can be seen, there is some kind of weak correlation on the amount of faulty behaviour, but it actually speaks against using a stable and measured PSU.

Are these the same symptoms other comment writers have seen? This seems to be quite widely reported problem, so if it were quality trouble, it might already be sorted out (but we do not know enough about this). Are there any other ideas to try?

alimac
Posts: 3
Joined: Thu Mar 17, 2016 3:24 am

Re: New Display - Cursor Jumps and Clicks all over the place

Thu Mar 17, 2016 3:32 am

I'm having the same difficulty with phantom clicks/ghost touches. They seem to come at random, mostly on the left side of the screen. I have 2 7" Pi touch displays and they both have done it. It's threatening to destroy usability of the C++/Qt application we've spent 6 months developing. Would love to find the cause and remedy as we don't want to have to switch hardware.

texy
Forum Moderator
Forum Moderator
Posts: 5131
Joined: Sat Mar 03, 2012 10:59 am
Location: Berkshire, England

Re: New Display - Cursor Jumps and Clicks all over the place

Thu Mar 17, 2016 3:25 pm

I wonder if it is related to the pygame issue with Jessie?
Maybe try this, to downgrade SDL :
viewtopic.php?f=32&t=131889&p=925861

Texy
Various male/female 40- and 26-way GPIO header for sale here ( IDEAL FOR YOUR PiZero ):
https://www.raspberrypi.org/forums/viewtopic.php?f=93&t=147682#p971555

9aed
Posts: 17
Joined: Wed Sep 24, 2014 11:49 pm

Re: New Display - Cursor Jumps and Clicks all over the place

Fri Mar 18, 2016 7:05 pm

texy wrote:I wonder if it is related to the pygame issue with Jessie?
Maybe try this, to downgrade SDL :
viewtopic.php?f=32&t=131889&p=925861

Texy
Tried. No noticeable effect and a new record:

Code: Select all

   47	0     6		 1962	1    48		 2229	0     3
  263	1    37		 1969	0     4		 2231	2    22
  360  56  1840		 1971	0     3		 2236	0     7
  804	1    29		 1973	4    19		 2238	7    82
  812	2    77		 1982	0     5		 2247	3    38
 1260	2    83		 1985	1     5		 2252	0     6
 1273	9   329		 1988	1    11		 2254	1     5
 1533	1     3		 1991	0    13		 2257	1    20
 1600	0     5		 1994	1    12		 2260	0    12
 1604	0     6		 1999	2    23		 2263	1    31
 1608	0     6		 2004	0     2		 2269	0    17
 1621	0     2		 2031	0     3		 2272	4    26
 1630	1     9		 2034	7    50		 2279	0     3
 1634	0     9		 2043	4    53		 2282	7    49
 1641	1     7		 2050	1    24		 2298	0     2
 1645	6    53		 2058	0    12		 2306	2    30
 1655	4    46		 2060	0    11		 2311	0     2
 1663	0    13		 2065	0     9		 2313	8   119
 1668	0     2		 2067	2    35		 2323  18   357
 1678	0     4		 2074	2     5		 2344	7   119
 1682	5    50		 2078	6   127		 2353	0    11
 1689	2    25		 2086	3    82		 2356	1    14
 1695	2    47		 2092	5    46		 2359	0     2
 1701	5    42		 2101	0     4		 2362	2    53
 1711	2    86		 2109	3    49		 2367  29   885
 1717	1     9		 2114	0     2		 2402	0     6
 1722	1     9		 2116  10   122		 2452	0     8
 1731	0     3		 2128	2    97		 2461	0     2
 1735	3    30		 2137	0     5		 2463  20   587
 1744  28   481		 2142	7    50		 2485	0    15
 1774	4    91		 2151	2    22		 2488	2    18
 1781	0     3		 2156	3    32		 2500	1     6
 1783	0     2		 2163	0     2		 2504	0     8
 1809	2    25		 2167	0     6		 2506	1    45
 1815	0     3		 2171	0     7		 2510	1     9
 1817	1    10		 2174	3    16		 2514	0     2
 1821	0     2		 2179	0     2		 2516	4    28
 1823  10   180		 2184	1     5		 2526	0     2
 1836	0     8		 2196	0     7		 2532	0     6
 1838	0     6		 2198	0     8		 2536	0     6
 1914	3    21		 2203	0     4		 3483	1    55
 1924	0     2		 2211	2    82		 3493	1    29
 1926	0     2		 2215	1     7		 3499	5   217
 1934	1    25		 2222	0     3		 3560  10   388
 1949	1    32		 2225	0     2		 3634 2171 74250
 1960	0     5		 2227	0     2
Note, at the last datapoint, just after an hour of logging, the display managed to generate 74250 events over 2171 seconds, without pausing for a second. That means continuously messing around the desktop for over 30 minutes.

As I understand it, this is as it should now look like:

Code: Select all

[email protected]:~ $ dpkg -l | grep libsdl
ii  libsdl-image1.2:armhf                 1.2.12-5+b1                               armhf        Image loading library for Simple DirectMedia Layer 1.2, libraries
ii  libsdl-mixer1.2:armhf                 1.2.12-11+b1                              armhf        Mixer library for Simple DirectMedia Layer 1.2, libraries
ii  libsdl-ttf2.0-0:armhf                 2.0.11-3                                  armhf        TrueType Font library for Simple DirectMedia Layer 1.2, libraries
ii  libsdl1.2debian:armhf                 1.2.15-10+rpi1                            armhf        Simple DirectMedia Layer
[email protected]:~ $ 
As expected, detaching the narrow touch detector cable is an effective countermeasure, but then all that is left is just the display. Not completely useless, but not exactly as intended either.

At one point it appeared that burdening the CPU constantly would stabilize things, but then testing by running

Code: Select all

yes | tail
did not help. The CPU temperature was around 42 degrees (A+ device).

alimac
Posts: 3
Joined: Thu Mar 17, 2016 3:24 am

Re: New Display - Cursor Jumps and Clicks all over the place

Sat Mar 19, 2016 2:01 pm

What's interesting in our project is we were mostly (95%) free of phantom clicks until we put the Pi/audiocard/screen into a 3D printed plastic case. Inside the plastic case we are noticing phantom clicks several times a minute. My uneducated guess is maybe there is an accumulation of heat static or something else inside the case that is causing the issue. We're going to try some shielding with aluminum foil and see if that improves things.

9aed
Posts: 17
Joined: Wed Sep 24, 2014 11:49 pm

Re: New Display - Cursor Jumps and Clicks all over the place

Mon Mar 21, 2016 1:45 pm

alimac wrote:We're going to try some shielding with aluminum foil and see if that improves things.
Inspired by that, the local display has been overly wrapped in nice foil packaging. I have even tried to run the device under cover. Result: Capacitive sensors have a hard time sensing anything properly through earthed, conductive metal sheet. Problems persist - without or within cover.

Only connections have been the µUSB power connector (floating charger supply), WLAN adapter, ground (on some tests) and oscilloscope probe (on some tests as well), measuring ripple and spikes well under 100 mV, as measured from the free GPIO 5V/GND pins. Everything in working order there, no rainbow pop-ups, red LED constantly on.

I went through posts concerning similar experiences (a bit absent-mindedly, these numbers are not conclusive) and counted at least 10 users having a similar problem. As forum posts are always just the tip of the problem, we can suppose there are a tad bit more cases. Taking into account that the display is already 6 months old, this might point to quality control. On the other hand, RPF seems to take matters of quality quite seriously, and this would have been dealt with by testing already.

We do not know the numbers, so we cannot make any educated guesses. The fault may develop after these devices leave factory and be completely invisible in testing. There may be lots of reasons to cause this failure mode (but that would strongly point to sloppy design). Or, these might be selling like hot cakes and it would be a miracle that so few problems are seen at all.

Of these reported 10 cases, replacement was suggested for half of them, one replacement was reported (as successful) and comments end for the moment with the rest of the cases.

The following does, however, make me wonder:
alimac wrote:I have 2 7" Pi touch displays and they both have done it.
With any reliable product, the chances for having 2 (of 2 - both!) faulty units should be appreciably low. Were these from the same lot? If so, there is a quality control problem. If not, there are a lot of faults around. Or some detail in environment causes discomfort for the detector. Which detail? We need more data.

Taking all this into consideration, the next step appears to be that the RMA procedure will start, since power supply seems not to be the issue here, all cables have been properly seated, software is up to date and it has even not been full moon yet. Anything else would be even heavier speculation. I will report on results!

flintiii
Posts: 2
Joined: Wed May 18, 2016 12:17 pm

Re: New Display - Cursor Jumps and Clicks all over the place

Wed Aug 03, 2016 4:53 pm

Greetings 9aed,

You posted some results about the eratic mouse in March. You mention this is from a program you have.

Can you please post the code, or the location of the code, as It would appear to be a great troubleshooting tool.

Thanks in advance and...

Kindest Regards,

Flint

that sweet pi
Posts: 16
Joined: Thu Aug 31, 2017 9:50 am
Contact: Skype

Re: New Display - Cursor Jumps and Clicks all over the place

Sat Jan 06, 2018 5:46 pm

hey, i have my raspberry pi hooked up to a 5inc touchscreen and whenever i put the provided pen on the screen the mouse is shaking, its the same when i use my finger, im using the official power supply for the pi and its hooked into the power from the wall. but i cant seem to fix the problem, does anyone has a solution for this?

texy
Forum Moderator
Forum Moderator
Posts: 5131
Joined: Sat Mar 03, 2012 10:59 am
Location: Berkshire, England

Re: New Display - Cursor Jumps and Clicks all over the place

Sat Jan 06, 2018 5:55 pm

This thread and subforum only concern the official display.
I suggest you start a new thread on troubleshooting and give more detail then you have so far - make and actual display type, which os you are using, etc
Texy
Various male/female 40- and 26-way GPIO header for sale here ( IDEAL FOR YOUR PiZero ):
https://www.raspberrypi.org/forums/viewtopic.php?f=93&t=147682#p971555

WildBerry
Posts: 1
Joined: Thu Mar 15, 2018 9:18 pm

Re: New Display - Cursor Jumps and Clicks all over the place

Wed Apr 04, 2018 4:36 pm

I have been experiencing similar behavior with a Pi3B using an external monitor. Moving the Pi to a new location solved the issue. As an addition, a new Win10 laptop was put in the same place as the Pi and that exhibited identical behavior (Random program launches, multi tab opening on browsers etc). Turning off electricity (to the entire home) and supplying power via battery on both units had no effect on the experience, so the current theory is some random RF.

Return to “Official Foundation Display”

Who is online

Users browsing this forum: No registered users and 2 guests