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by FTrevorGowen
Thu Dec 12, 2019 9:26 am
Forum: Troubleshooting
Topic: pi 4 32GB sd card doesn't work.
Replies: 64
Views: 8070

Re: pi 4 32GB sd card doesn't work.

Trev, I think you are missing our point. It is possible that we have a bad SD card or reader. But I don't think so because mine work just fine in my Raspberry Pi 3. The same card, reader, and image don't work fine in my Raspberry Pi 4. And a 16GB SD card works fine in my RPi 4. I conclude that the ...
by FTrevorGowen
Wed Dec 11, 2019 11:13 pm
Forum: Troubleshooting
Topic: pi 4 32GB sd card doesn't work.
Replies: 64
Views: 8070

Re: pi 4 32GB sd card doesn't work.

2. your card reader is not fully compatible with the SD card, when writing the image to the SD card in the first place I used the SD/uSD card adapter provided by SAMSUNG, then, the SD adapter was inserted in my laptop's slot. Same was done with the Sandisk uSD card witch was much faster for reading...
by FTrevorGowen
Wed Dec 11, 2019 11:00 pm
Forum: Beginners
Topic: Assistance with Resolutions on VNC
Replies: 3
Views: 95

Re: Assistance with Resolutions on VNC

I installed X11VNC. VNC currently works, but the display is all over the place. I plan on keeping the screen attached to the GPIO ports for local access, But i wanted to use VNC to connect to the pi from another PC to do the bulk of the work. From what i have read so far, people keep saying to remo...
by FTrevorGowen
Wed Dec 11, 2019 6:03 pm
Forum: Beginners
Topic: Assistance with Resolutions on VNC
Replies: 3
Views: 95

Re: Assistance with Resolutions on VNC

I am having an issue, Maybe due to being wet behind the ears with linux and not know everything it can do. Here is my setup: Raspberry PI 4, the 4gb model. I have a screen that i bought, works just fine (https://www.amazon.com/Raspberry-Touchscreen-320x480-Monitor-Display/dp/B07WQW6H9S) Kali Linux ...
by FTrevorGowen
Tue Dec 10, 2019 11:33 pm
Forum: Troubleshooting
Topic: I2C Help
Replies: 3
Views: 94

Re: I2C Help

I2C help: Hello, I have done all of the correct installations and have enabled the I2C on the pi. When I run an i2cdetect -y 1, I get this message: i2cdetect -y -r 1 0 1 2 3 4 5 6 7 8 9 a b c d e f 00: -- -- -- -- -- -- -- -- -- -- -- -- -- 10: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 20: --...
by FTrevorGowen
Mon Dec 09, 2019 12:21 am
Forum: Troubleshooting
Topic: Wifi will not connect to a network unless a keyboard and mouse is to the pi
Replies: 2
Views: 86

Re: Wifi will not connect to a network unless a keyboard and mouse is to the pi

I have an old Raspberry Pi model B that I bought in 2013 but I’ve only started using it. I have a wireless USB adapter which does connect to wifi on startup automatically but only when a keyboard and mouse is also connected to the pi. They all connect through an amazon basics usb hub. I would like ...
by FTrevorGowen
Sat Dec 07, 2019 9:26 pm
Forum: General discussion
Topic: Device not detected using i2c-detect y 1
Replies: 10
Views: 248

Re: Device not detected using i2c-detect y 1

From your photo's you appear to also have a connection to the CS pin on the BME280 (Red wire ). If I'm interpreting Adafruit's BME280 Pinouts ( https://learn.adafruit.com/adafruit-bme280-humidity-barometric-pressure-temperature-sensor-breakout/pinouts ) data correctly for I2C use that pin should not...
by FTrevorGowen
Sat Dec 07, 2019 5:45 pm
Forum: Troubleshooting
Topic: Query regarding Raspbian installation on Pie 4 Model B
Replies: 2
Views: 83

Re: Query regarding Raspbian installation on Pie 4 Model B

abdul.hannan wrote:
Sat Dec 07, 2019 10:24 am
...
Yellow light on the pie board is blinking even than no display on VGA.
...
Hmm. Does your reference to "VGA" above mean you're trying to use a HDMI-to-VGA adapter and a display with a VGA (not HDMI) input?
Trev.
by FTrevorGowen
Fri Dec 06, 2019 3:35 pm
Forum: Beginners
Topic: Desktop Kit SD Card
Replies: 1
Views: 73

Re: Desktop Kit SD Card

Locking, effectively, but not quite, a duplicate of:
https://www.raspberrypi.org/forums/view ... 1&t=258585
Please reply in that thread,
Trev.
by FTrevorGowen
Fri Dec 06, 2019 3:24 pm
Forum: Troubleshooting
Topic: How to set desktop resolution with FKMS enabled
Replies: 7
Views: 152

Re: How to set desktop resolution with FKMS enabled

For the desktop use the Screen Configuration tool under Preferences. X ignores all settings that you pass to the kernel, so they only end up affecting the console. As I don't usually "fiddle with that" am I correct in assuming that, by default (ie. like the console) the maximum resolution is used o...
by FTrevorGowen
Fri Dec 06, 2019 1:14 pm
Forum: Troubleshooting
Topic: How to set desktop resolution with FKMS enabled
Replies: 7
Views: 152

Re: How to set desktop resolution with FKMS enabled

For the desktop use the Screen Configuration tool under Preferences. X ignores all settings that you pass to the kernel, so they only end up affecting the console. As I don't usually "fiddle with that" am I correct in assuming that, by default (ie. like the console) the maximum resolution is used o...
by FTrevorGowen
Thu Dec 05, 2019 10:47 pm
Forum: Troubleshooting
Topic: How to set desktop resolution with FKMS enabled
Replies: 7
Views: 152

Re: How to set desktop resolution with FKMS enabled

Hi, I'm trying to set a deliberately low resolution for my desktop, and I need fkms (or at least, I must have GPU enabled for kivy, I think that's the same thing?) I know the monitor/desktop does support 840x480, because it can do it when fkms isn't enabled. With my settings, the text boot console ...
by FTrevorGowen
Thu Dec 05, 2019 2:51 pm
Forum: Troubleshooting
Topic: No X11 (black screen) when using LCD display.
Replies: 15
Views: 325

Re: No X display (black screen) after boot.

Sorry, I'd forgot you were using an LCD display (not using HDMI). In that situation the tvservice command is not that helpful as can be seen even when used with the official display**: I don't understand… I am using the official display (or at least a very similar model looking exactly the same as ...
by FTrevorGowen
Thu Dec 05, 2019 12:41 pm
Forum: Troubleshooting
Topic: No signal on HDMI port to Monitor
Replies: 7
Views: 174

Re: No signal on HDMI port to Monitor

Thanks Trev for the response. I reset the config.txt to the default as suggested. Modified the P4 section as suggested. No luck, still no signal. I can SSH as well as start and access the vncserver on Pi. It is only that I need the display to work so that I can do away with all other computers in m...
by FTrevorGowen
Wed Dec 04, 2019 11:07 pm
Forum: Troubleshooting
Topic: No X11 (black screen) when using LCD display.
Replies: 15
Views: 325

Re: No X display (black screen) after boot.

O.K. In your O.P. you did mention you can connect via SSH etc. Can you post the output of these tvservice commands please? Here there are: $ tvservice -n device_name=Ras-LCD Panel $ tvservice -m DMT Group DMT has 0 modes: $ tvservice -m CEA Group CEA has 0 modes: $ tvservice -s state 0x400000 [LCD]...
by FTrevorGowen
Wed Dec 04, 2019 10:30 pm
Forum: Troubleshooting
Topic: Headless Pi not booting into correct screen resolution.
Replies: 5
Views: 133

Re: Headless Pi not booting into correct screen resolution.

Okay, thank you for the help I managed to get it to boot into the resolution in which I desired, however how do I open this over the cloud. For example, right now I can enter 10.0.0.145:1 in vncviewer but what would I do if I wasn't connected to the same internet? Sorry, don't use "the cloud" so ca...
by FTrevorGowen
Wed Dec 04, 2019 9:53 pm
Forum: Troubleshooting
Topic: Headless Pi not booting into correct screen resolution.
Replies: 5
Views: 133

Re: Headless Pi not booting into correct screen resolution.

So would I want to disable the vnc server from automatically starting on boot? And then ssh into my machine and then do vncserver --geometery 1920x1080? Or what would I do, I'm having a hard time following all of those pictures. The virtual mode runs independently of any "automatic on boot" service...
by FTrevorGowen
Wed Dec 04, 2019 9:09 pm
Forum: Troubleshooting
Topic: Headless Pi not booting into correct screen resolution.
Replies: 5
Views: 133

Re: Headless Pi not booting into correct screen resolution.

I am currently running a headless pi 4b and I am using mosh and VNC viewer to control it. I have specified in my config.txt file to boot into 1080p @60Hz however this only works if I have my 1080p monitor plugged in. Before if I would start the Pi without a monitor plugged in I couldn't use VNC vie...
by FTrevorGowen
Wed Dec 04, 2019 9:02 pm
Forum: Troubleshooting
Topic: Raspberry 4 not recognizing USB-Hub behind USB-switch
Replies: 4
Views: 142

Re: Raspberry 4 not recognizing USB-Hub behind USB-switch

What model of USB switch? Can you post the output of: lsusb lsusb -t with & w/o the switch on the P3B+ (that shorter form of the command makes it easier to find info. buried in the "noise" of your "full dump") How (mechanically) do you switch between Pi's? I have a similar issue in that this device:...
by FTrevorGowen
Wed Dec 04, 2019 8:49 pm
Forum: Troubleshooting
Topic: No signal on HDMI port to Monitor
Replies: 7
Views: 174

Re: No signal on HDMI port to Monitor

Hi, I have 19M38HB LG Monitor and Raspberry Pi 4 Model B running Linux 4.19.75-v7l+ #1270 SMP, Raspbian. I keep getting no signal when connected to the monitor. Tried with various Config.txt setting.. hdmi_force_hotplug=1, hdmi_group=2 , hdmi_mode=81/4 hdmi_safe=1 also didn't help ... [pi4] # Enabl...
by FTrevorGowen
Wed Dec 04, 2019 8:23 pm
Forum: Troubleshooting
Topic: Pi 4, Display - No Input, hdmi_safe=1, irregular green blinks
Replies: 4
Views: 140

Re: Pi 4, Display - No Input, hdmi_safe=1, irregular green blinks

... There is another interesting feature of Raspberries of the fourth version: first you need to turn on the monitor, and then turn on the Raspberries. ... That's always been the preferred approach for all Pi's connected to a display (ie. not P4 specific but, since edid handling etc. has changed wi...
by FTrevorGowen
Wed Dec 04, 2019 7:58 pm
Forum: Raspbian
Topic: Problems maintaining VNC connection - Cannot Currently show the desktop
Replies: 6
Views: 188

Re: Problems maintaining VNC connection - Cannot Currently show the desktop

Thanks for the response. I checked my notes and I did sudo apt-get update sudo apt-get install realvnc-vnc-server realvnc-vnc-viewer So it is realVNC that is installed. O.K. just so we have a better idea of your setup can you post the output of these commands: uname -a cat /etc/os-release Trev.
by FTrevorGowen
Wed Dec 04, 2019 12:55 am
Forum: Troubleshooting
Topic: Pi4: Screen settings are not saved
Replies: 8
Views: 179

Re: Pi4: Screen settings are not saved

I may not be a Pi 'expert', but as a retired computer tech, this bit looks like it might be forcing 1024 x 768 # uncomment to force a specific HDMI mode (this will force VGA) hdmi_group=2 hdmi_mode=82 I've cross-checked that here: https://www.raspberrypi.org/documentation/configuration/config-txt/v...
by FTrevorGowen
Wed Dec 04, 2019 12:39 am
Forum: Troubleshooting
Topic: Pi4: Screen settings are not saved
Replies: 8
Views: 179

Re: Pi4: Screen settings are not saved

Before editing /boot/config.txt (which is trickier with NOOBS since there may be more than one version, depending on how many O.S.'s the NOOBS installer has installed) it's best to check what HDMI settings are available and are "preferred" or "native". (For most displays a "preferred" mode is automa...
by FTrevorGowen
Wed Dec 04, 2019 12:09 am
Forum: General discussion
Topic: External USB with Pi 4 Issues
Replies: 4
Views: 198

Re: External USB with Pi 4 Issues

I am running Pi headless but have VNC configured and SSH. When I connect an external USB to the device, I always get Not authorized to perform operation. The drive is visible in the navigation tree but I am unable to access it. What am I missing? If you're running headless w/o desktop then, for Ras...

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