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by jpezz
Fri Jul 30, 2021 5:22 pm
Forum: Troubleshooting
Topic: ligtdm onboard keyboard initially shows as black screen
Replies: 9
Views: 356

Re: ligtdm onboard keyboard initially shows as black screen

I don't login as root. I just su to it so as not to have to put sudo on every command when I am working on system files. Been doing that since I first started using Unix back in 1983.
by jpezz
Fri Jul 30, 2021 12:50 pm
Forum: Troubleshooting
Topic: ligtdm onboard keyboard initially shows as black screen
Replies: 9
Views: 356

Re: ligtdm onboard keyboard initially shows as black screen

I'll try the "1"setting. I think that onboard is not starting on top so it is in actuality under the background color. Turning it off then on via the Accessibility feature appears to put it on top so it is visible. Remember, this is prior to any login so there is no user (other than root)....
by jpezz
Fri Jul 30, 2021 1:37 am
Forum: Troubleshooting
Topic: ligtdm onboard keyboard initially shows as black screen
Replies: 9
Views: 356

Re: ligtdm onboard keyboard initially shows as black screen

My greeter settings in the GUI look exactly like yours. My results are not. It looks like onboard is not putting itself on the top of the background until I force it to be by turning it off then turning it on. Tomorrow I'll take the changes out of the greeter file and use the GUI to put them back in...
by jpezz
Thu Jul 29, 2021 10:13 pm
Forum: Troubleshooting
Topic: ligtdm onboard keyboard initially shows as black screen
Replies: 9
Views: 356

Re: ligtdm onboard keyboard initially shows as black screen

Thanks but I don't understand what you're suggesting. Is it supposed to be 1? Right now, the line has it set to 0 but it is commented out.

As to the greeter-settings program, I don't see what it gains me. It shows the onboard keyboard set up.



Thanks.
by jpezz
Thu Jul 29, 2021 5:54 pm
Forum: Troubleshooting
Topic: ligtdm onboard keyboard initially shows as black screen
Replies: 9
Views: 356

ligtdm onboard keyboard initially shows as black screen

I removed the pi-greeter with apt-get remove pi-greeter and I'm using the default lightdm-gtk-greeter.conf file. I edited that file to add the following lines: indicator=~a11y a11y-states=+keyboard keyboard=onboard Where the keyboard comes up, it shows just black. If the then go to the Accessibility...
by jpezz
Mon Feb 08, 2021 2:55 pm
Forum: Advanced users
Topic: Play fixed frequency sound in python 3
Replies: 3
Views: 650

Re: Play fixed frequency sound in python 3

Thanks. I got pysine loaded on my test system and it works great - does exactly what I want. pysine.sine(frequency=Tone_Frequency, duration=Timer[Timer_Pos]) However, the presence of the import pysine without the pysine .sine, generates a bunch of errors (sent to stderr) which I ignore because it wo...
by jpezz
Sun Feb 07, 2021 4:39 pm
Forum: Advanced users
Topic: Play fixed frequency sound in python 3
Replies: 3
Views: 650

Play fixed frequency sound in python 3

I would just like to play a fixed frequency for a fixed period of time to the default speakers (HDMI or other) on a RP3 running wheezy with eventual porting to RPI 4 on Buster. This is from within a python 3 program. I am not playing anything from a file - just outputting a tone to the speaker. Beca...
by jpezz
Fri Jan 29, 2021 11:21 pm
Forum: Advanced users
Topic: Anyone successfully install firefox-esr 52.X on RPI 4
Replies: 5
Views: 536

Re: Anyone successfully install firefox-esr 52.X on RPI 4

I need a 52.X release of Fireefox-ESR. Likely all will work for my application as it will not connect to the internet. I need to use a legacy add-on that this version has the support for. Has anyone got it downloaded and running on a RPI 4? You will have to build the package from Source Code, but y...
by jpezz
Fri Jan 29, 2021 1:21 pm
Forum: Advanced users
Topic: Anyone successfully install firefox-esr 52.X on RPI 4
Replies: 5
Views: 536

Re: Anyone successfully install firefox-esr 52.X on RPI 4

I am thinking your only hope is a virtual machine, a quick search shows it built for jessie, I doubt that OS will run natively on a Pi 4. https://packages.debian.org/jessie/armhf/firefox-esr-dev/download Unfortunately, that's only a small piece of the firefox-esr and is source. To get the rest, you...
by jpezz
Fri Jan 29, 2021 1:51 am
Forum: Advanced users
Topic: Anyone successfully install firefox-esr 52.X on RPI 4
Replies: 5
Views: 536

Anyone successfully install firefox-esr 52.X on RPI 4

I need a 52.X release of Fireefox-ESR. Likely all will work for my application as it will not connect to the internet. I need to use a legacy add-on that this version has the support for. Has anyone got it downloaded and running on a RPI 4?
by jpezz
Wed Jan 13, 2021 10:05 pm
Forum: General discussion
Topic: Loading parts of the system into memory disks
Replies: 1
Views: 171

Loading parts of the system into memory disks

For a project with a 3B, I wrote a number of python and shell scripts but the performance of all those slowed town my time-sensitive application so I set it up that when the user logs on to autorun the application, the first thing that happens is that a number of small memory partitions get created ...
by jpezz
Thu Feb 13, 2020 2:28 pm
Forum: Troubleshooting
Topic: Battery question
Replies: 3
Views: 327

Re: Battery question

I've seen this when using battery packs on all sorts of devices (without a Pi involved). it appears that many power devices sense that the current is so low, it is below their threshold and turn off. I can only recommend one simple solution that worked for me. Power the Pi from a small battery pack ...
by jpezz
Sat Jun 01, 2019 8:41 pm
Forum: Raspberry Pi OS
Topic: Kweb Suite (Minimal Kiosk Browser, omxplayerGUI)
Replies: 1599
Views: 858797

Re: Kweb Suite (Minimal Kiosk Browser, omxplayerGUI)

Commands are always run in a terminal by default. If a ".desktop" file is found in/usr/share/application for the command (exact match), no terminal is used (by default, but this can be disabled). To run background scripts without a terminal, they have to be entered in the "direct com...
by jpezz
Thu May 30, 2019 7:34 pm
Forum: Raspberry Pi OS
Topic: Kweb Suite (Minimal Kiosk Browser, omxplayerGUI)
Replies: 1599
Views: 858797

Re: Kweb Suite (Minimal Kiosk Browser, omxplayerGUI)

It seems like my iframe shell scripts all start by running a visible lxterminal that quickly disappears. But it can cause confusion to the kiosk users because they flash on the screen. They both have entries in the "direct command execution" section. The information there is confusing as w...
by jpezz
Fri Apr 19, 2019 10:15 pm
Forum: Beginners
Topic: [Boot Time] Wifi needed - Static IP vs. DHCP
Replies: 1
Views: 245

Re: [Boot Time] Wifi needed - Static IP vs. DHCP

How quickly do you need the wi-fi? In a stand-alone setup I don't want wi-fi but I do need it to get the time from NIST, so I added a "nohup" backgrounded script in my rc.local file that turns on wi-fi, updates the clock from NIST then turns it off. Because it is backgrounded, it doesn't d...
by jpezz
Fri Apr 19, 2019 10:05 pm
Forum: Beginners
Topic: Can't get list command to work on my Hard Drive "Seagate Bac"
Replies: 5
Views: 518

Re: Can't get list command to work on my Hard Drive "Seagate Bac"

FYI: Unix never did like spaces in names nor many "special" characters. You can "escape" them by preceding them with a backslash or, better yet, learn to keep away from the OS-specific best-not-to-use (which Windows cmd also has). Both accept the underscore which not only allows ...
by jpezz
Fri Apr 19, 2019 9:58 pm
Forum: Beginners
Topic: Error when running tkinter in a script as a process
Replies: 3
Views: 1248

Re: Error when running tkinter in a script as a process

You probably need a few things prior to running the python program 1) You need to excute $xhost + which allows other users to output to your display. This must be done BEFORE the (even root-owned) GUI runs once you are logged in. Note, the xhost command doesn't have to allow everyone anything but do...
by jpezz
Fri Apr 19, 2019 9:40 pm
Forum: Beginners
Topic: pi boot and run impress and then a slideshow
Replies: 10
Views: 1131

Re: pi boot and run impress and then a slideshow

Instead of trying to to the whole thing at reboot, try it first from the command line $ prompt. Does it work? Does it find the slideshow file? Now try running it from another directory (keep the slideshow where it is but do a "cd Download" or other directory. Does it still find the file an...
by jpezz
Fri Apr 19, 2019 9:21 pm
Forum: Beginners
Topic: TouchScreen with Raspberry
Replies: 1
Views: 325

Re: TouchScreen with Raspberry

I have done 3 touchscreen systems: 1) A museum question/answer system that used shell scripts and built-in programs such as gxmessage and feh for displaying and getting back information based on user selections. It is not Pi specific so it was easy to explain what you want for an output and what you...
by jpezz
Wed Apr 17, 2019 8:30 pm
Forum: Troubleshooting
Topic: plexar 2430mw touchscreen gets error mesage and won't align.
Replies: 0
Views: 230

plexar 2430mw touchscreen gets error mesage and won't align.

First, let me say I've never had any trouble in the past with HP or Acer touchscreens. They were simply plug-and-go. $uname -a Linux raspberrypi 4.14.98-v7+ #1200 SMP Tue Feb 12 20:27:48 GMT 2019 armv7l GNU/Linux dmesg shows usbhid 1-1.3:1.1: couldn't find an input interrupt endpoint The touchscreen...
by jpezz
Fri Apr 05, 2019 2:44 pm
Forum: Troubleshooting
Topic: Can I get back the flashing green light?
Replies: 8
Views: 917

Re: Can I get back the flashing green light?

HawaiianPi wrote:
Fri Apr 05, 2019 2:15 am
jpezz wrote:
Fri Apr 05, 2019 1:33 am
Green light, wherefore art thou?
Dead, most likely. :cry:

The question is, what killed it? :?
Oh well! Better the light than the Pi. Thanks.
by jpezz
Fri Apr 05, 2019 2:42 pm
Forum: Troubleshooting
Topic: Can I get back the flashing green light?
Replies: 8
Views: 917

Re: Can I get back the flashing green light?

All that did was stop the poweroff from completing. Thanks anyway. What makes you think it didn't complete? (ETA: You did disable your script when you tried the other method, didn't you?) The Pi doesn't power off as such - it just halts*. Either method produces exactly the same result as far as I c...
by jpezz
Fri Apr 05, 2019 1:33 am
Forum: Troubleshooting
Topic: Can I get back the flashing green light?
Replies: 8
Views: 917

Re: Can I get back the flashing green light?

I have a Pi 3B+ and used the shutdown switch program described here: https://www.instructables.com/id/Simple-Raspberry-Pi-Shutdown-Button/ . It works great. However, the first time I used it, it flashed the green light as it said but then on, there is no green light EVER i.e. on bootup, disk access...
by jpezz
Fri Apr 05, 2019 1:26 am
Forum: Troubleshooting
Topic: Can I get back the flashing green light?
Replies: 8
Views: 917

Re: Can I get back the flashing green light?

Can't help with the light, but you don't need a script for that on the 3B+. Just add the following line to /boot/config.txt dtoverlay=gpio-shutdown,gpio_pin=3 You can change the GPIO pin, but leaving it at 3 means the same button will start the Pi up again too. Of course, if you use I2C which uses ...
by jpezz
Thu Apr 04, 2019 1:41 pm
Forum: Troubleshooting
Topic: Can I get back the flashing green light?
Replies: 8
Views: 917

Can I get back the flashing green light?

I have a Pi 3B+ and used the shutdown switch program described here: https://www.instructables.com/id/Simple-Raspberry-Pi-Shutdown-Button/ . It works great. However, the first time I used it, it flashed the green light as it said but then on, there is no green light EVER i.e. on bootup, disk access,...

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