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by FTrevorGowen
Mon Mar 23, 2020 12:30 pm
Forum: Troubleshooting
Topic: Pi4 won't keep screen resolution.
Replies: 19
Views: 662

Re: Pi4 won't keep screen resolution.

Having looked up what a Prolite E4355 display is it appears to use a DVI input rather than HDMI. So, if that's the case what are you using to convert micro-HDMI to DVI? Eg. a single cable or cable(s) + adapter(s). Others have reported strange issues with some adapter combinations.
Trev.
by FTrevorGowen
Mon Mar 23, 2020 11:29 am
Forum: Troubleshooting
Topic: Pi4 won't keep screen resolution.
Replies: 19
Views: 662

Re: Pi4 won't keep screen resolution.

It's a Prolite E4355. It says [E] Failed to initialize VCHI (ret=-1) In response to all those commands. That's after changing resolution, "Before" will have to wait until next time I log in, but I don't think it will be different... I did try changing config.txt to try to force the screen size, but...
by FTrevorGowen
Mon Mar 23, 2020 11:08 am
Forum: Troubleshooting
Topic: Pi4 won't keep screen resolution.
Replies: 19
Views: 662

Re: Pi4 won't keep screen resolution.

I can set the screen resolution quite happily to 1280 x 1064 using the Screen configuration tool, but it always goes back to 1024 x 768 when I restart X-windows. Why is it doing it and how do I get it to keep the chosen settings? What sort/make/model of display are you using? Is it being "detected"...
by FTrevorGowen
Sun Mar 22, 2020 4:29 pm
Forum: Troubleshooting
Topic: Pi 4 boot fails at rainbow screen
Replies: 4
Views: 226

Re: Pi 4 boot fails at rainbow screen

Hi, Given the lack of response, I'm assuming there is no known process to fix this. I reformatted the SD-Card and started again. Back up an running, but of course substantial wasted time. I imaged the SD this time after initial configuration. If it happens again, I'll have to conclude a defective S...
by FTrevorGowen
Fri Mar 20, 2020 10:57 am
Forum: Raspberry Pi OS
Topic: Raspbian download file size incorrect
Replies: 4
Views: 416

Re: Raspbian download file size incorrect

Hi, Actually I'm Looking For An Answer Too. I Had No Problems With Other Downloads But With This One Raspbian Buster with desktop ##################### Yesterday & Today I Downloaded (Three Times) Raspbian Buster with desktop and recommended software Which Supposed To Be 2530 MB And Check Sum Indic...
by FTrevorGowen
Thu Mar 19, 2020 10:35 pm
Forum: Troubleshooting
Topic: Pi4- USB NTFS HDD mounting for idiots
Replies: 18
Views: 1462

Re: Pi4- USB NTFS HDD mounting for idiots

LTolledo wrote: ↑
Thu Mar 19, 2020 10:30 pm
 I'd like to test this myself.... is this on a recently updated/upgraded Raspbian buster on RPi4B?
I'm not sure if you're referring to my post(s) or the O.P's - in my case, yes (see other thread linked to earlier for "uname" info.)
Trev.
by FTrevorGowen
Thu Mar 19, 2020 10:19 pm
Forum: Troubleshooting
Topic: Pi4- USB NTFS HDD mounting for idiots
Replies: 18
Views: 1462

Re: Pi4- USB NTFS HDD mounting for idiots

sorry FTrevorGowen, it was a typo above. I'm logged in as 'pi', not 'Pi'. Your link was interesting. I tried using the filemanager directly AND the desktop shortcut, and still am only able to access the drive as Read Only. FWIW, I've just plugged in an ntfs formatted Seagate** 1TB expansion drive a...
by FTrevorGowen
Thu Mar 19, 2020 9:53 pm
Forum: Troubleshooting
Topic: Swapping SD Card from one Pi4 to another
Replies: 6
Views: 420

Re: Swapping SD Card from one Pi4 to another

Swapping microSD card (with raspbian buster, initial full setup done on RPi4B-4G) between RPis is how I test newly arrived RPis. always boots normally as expected, never had any problems even with RPi4, RPiZ, etc. I've done that too or cloned a card with the SD Card Copier and used the clone (and s...
by FTrevorGowen
Thu Mar 19, 2020 9:42 pm
Forum: Troubleshooting
Topic: Pi4- USB NTFS HDD mounting for idiots
Replies: 18
Views: 1462

Re: Pi4- USB NTFS HDD mounting for idiots

I think we are getting to the crux of the issue- I am logged in as "Pi", and whenever I plug in this USB HDD, it mounts as read only. The HDD in question is a 2TB mechanical HDD. Earlier today I tried mounting a 500 GB Solid State drive (via a 3.5" Drive enclosure to USB adapter), and it mounted co...
by FTrevorGowen
Thu Mar 19, 2020 8:27 pm
Forum: Troubleshooting
Topic: Rpi4 Can't connect to 5Ghz, can to 2.4Ghz
Replies: 8
Views: 340

Re: Rpi4 Can't connect to 5Ghz, can to 2.4Ghz

... May also depend on the country code which you did set didn't you? Historically I've always tried to setup any WiFi router to avoid neighbour's channels rather than, if ISP provided, the default "out of the box". Something like the mobile/tablet WiFi Analyzer app. is very useful for that: https:...
by FTrevorGowen
Thu Mar 19, 2020 7:28 pm
Forum: Troubleshooting
Topic: Rpi4 Can't connect to 5Ghz, can to 2.4Ghz
Replies: 8
Views: 340

Re: Rpi4 Can't connect to 5Ghz, can to 2.4Ghz

Might have figured it out. My 5GHz SSID was in the high range. Channels 149-161 When I dropped it down to the low range (channels 36-48), it now see's it in the scan. Went into Raspi-Config and it connects now. I guess the Rpi4 is much more limited in 5G than I thought. May also depend on the count...
by FTrevorGowen
Thu Mar 19, 2020 6:45 pm
Forum: Beginners
Topic: Boot from microsd on laptop
Replies: 7
Views: 317

Re: Boot from microsd on laptop

Im trying to boot the raspbian OS from the microsd card (inserted to my laptop). My raspberry overclocked, and i need some files for my current web development project. I've tried the Oracle VirtualBox software in as a virtual enviorment and failed. Please help me fix this problem, for it will save...
by FTrevorGowen
Thu Mar 19, 2020 2:27 pm
Forum: Troubleshooting
Topic: Auto-mounted USB drive permissions "confusion"?
Replies: 0
Views: 111

Auto-mounted USB drive permissions "confusion"?

Background: I use two USB3 DataTraveler USB sticks with one of my P4B's one of which is always plugged in, the other only when I'm backing up, usually via Unison. Today my backup failed because the backup drive which had been plugged in after boot appeared to be "read only" for the pi user, subseque...
by FTrevorGowen
Wed Mar 18, 2020 11:04 pm
Forum: Beginners
Topic: Raspberry Pi 4 doesn't boot when TV is off
Replies: 2
Views: 143

Re: Raspberry Pi 4 doesn't boot when TV is off

Hi everybody, I was using a Pi 3, and now I moved to a Pi 4. I discovered a new feature in the Pi 4 that didn’t exist in the Pi 3. The Pi 4 doesn’t boot when a plugged TV is off. This is annoying for me since I want the Pi 4 to boot and to turn on the TV via CEC-Client. Is there any way to change t...
by FTrevorGowen
Wed Mar 18, 2020 10:30 pm
Forum: General discussion
Topic: Raspberry pi/Max7219 3.3 volt level to 5 volt problem
Replies: 2
Views: 147

Re: Raspberry pi/Max7219 3.3 volt level to 5 volt problem

FWIW, I've used a selection of pre-built "Level Shifter Modules" most of which are, AFAICT, based upon a similar approach to your circuit: https://www.cpmspectrepi.uk/raspberry_pi/MoinMoinExport/GpioLevelShifterModules.html At least one the links in the above page points to a test board that has sub...
by FTrevorGowen
Wed Mar 18, 2020 6:17 pm
Forum: Troubleshooting
Topic: Setting up a Raspberry Pi 3B
Replies: 2
Views: 133

Re: Setting up a Raspberry Pi 3B

1) What happens if you move the SD card that is working (setup) from the P4B to the P3B? 2) Are you using the same type of display for both Pi's? (ie. both are true monitors or T.V.'s not "one of each" - monitors normally use DMT HDMI modes, T.V.'s CEA modes and some T.V.'s have "peculiar" edid data...
by FTrevorGowen
Wed Mar 18, 2020 5:52 pm
Forum: Beginners
Topic: Will the Pi4 power adapter work on the Pi3?
Replies: 4
Views: 271

Re: Will the Pi4 power adapter work on the Pi3?

I have the official power adapter for the Raspberry 4. Can I safely use it on a Raspberry 3? Should be O.K. But you will need a (good) adapter like 'AG' here: https://www.cpmspectrepi.uk/raspberry_pi/MoinMoinExport/ExtendedTestKit.html#USBAdapterCables FWIW, see my "current loading" curves for some...
by FTrevorGowen
Wed Mar 18, 2020 5:30 pm
Forum: General discussion
Topic: USB PROBLEM: USB POWER SUPPLY
Replies: 36
Views: 1851

Re: USB PROBLEM: USB POWER SUPPLY

This is the resulf of dmesg | grep usb pi@raspberrypi:~ $ dmesg | grep usb [ 0.106848] usbcore: registered new interface driver usbfs [ 0.106900] usbcore: registered new interface driver hub [ 0.106968] usbcore: registered new device driver usb [ 0.599702] usbcore: registered new interface driver r...
by FTrevorGowen
Wed Mar 18, 2020 4:55 pm
Forum: General discussion
Topic: USB PROBLEM: USB POWER SUPPLY
Replies: 36
Views: 1851

Re: USB PROBLEM: USB POWER SUPPLY

This is the resulf of dmesg | grep usb pi@raspberrypi:~ $ dmesg | grep usb [ 0.106848] usbcore: registered new interface driver usbfs [ 0.106900] usbcore: registered new interface driver hub [ 0.106968] usbcore: registered new device driver usb [ 0.599702] usbcore: registered new interface driver r...
by FTrevorGowen
Wed Mar 18, 2020 3:39 pm
Forum: General discussion
Topic: USB PROBLEM: USB POWER SUPPLY
Replies: 36
Views: 1851

Re: USB PROBLEM: USB POWER SUPPLY

Yes, it still boot and i can access to it with SSH, but no other devices works O.K. but why have you not run those lsusb etc. commands and posted any output you get? (From the apparent symptoms USB is broken but we need more info. to attempt to determine "where" and, maybe, some indication of wheth...
by FTrevorGowen
Wed Mar 18, 2020 12:58 pm
Forum: General discussion
Topic: USB PROBLEM: USB POWER SUPPLY
Replies: 36
Views: 1851

Re: USB PROBLEM: USB POWER SUPPLY

Mouse: Trust GXT 105 Keyboard: Trust GXT 830-RW PI didn't work with them plugged into USB3 or USB2 O.K. Let's take a step or two back ... 1) Does your Pi still boot and, even if you can't use the above devices, does any other keyboard or mouse work? 2) Assuming it does boot did you/can you enable S...
by FTrevorGowen
Wed Mar 18, 2020 12:41 pm
Forum: Troubleshooting
Topic: Pink/purple screen after power on with Raspberry Pi 4 B 4GB
Replies: 5
Views: 673

Re: Pink/purple screen after power on with Raspberry Pi 4 B 4GB

Hello, Thank you for your reply. I tried those commands and here are the results: pi@raspberrypi:~ $ tvservice -n device_name=VIZ-E320i-A0 pi@raspberrypi:~ $ tvservice -m DMT Group DMT has 9 modes: (prefer) mode 4: 640x480 @ 60Hz 4:3, clock:25MHz progressive mode 6: 640x480 @ 75Hz 4:3, clock:31MHz ...
by FTrevorGowen
Tue Mar 17, 2020 9:28 pm
Forum: General discussion
Topic: USB PROBLEM: USB POWER SUPPLY
Replies: 36
Views: 1851

Re: USB PROBLEM: USB POWER SUPPLY

Mouse: Trust GXT 105 Keyboard: Trust GXT 830-RW PI didn't work with them plugged into USB3 or USB2 O.K. Let's take a step or two back ... 1) Does your Pi still boot and, even if you can't use the above devices, does any other keyboard or mouse work? 2) Assuming it does boot did you/can you enable S...
by FTrevorGowen
Tue Mar 17, 2020 6:31 pm
Forum: General discussion
Topic: USB PROBLEM: USB POWER SUPPLY
Replies: 36
Views: 1851

Re: USB PROBLEM: USB POWER SUPPLY

... The hub is a Trust 14591. It can not be externally powered. ... Is it this one: https://www.trust.com/en/product/14591-vecco-4-port-usb-2-0-mini-hub-black ? If so it's only suitable for use with low power devices eg. keyboards, mice, smaller (<32Gb**) usb-sticks etc. Generally HDD's will need t...
by FTrevorGowen
Tue Mar 17, 2020 5:23 pm
Forum: General discussion
Topic: USB PROBLEM: USB POWER SUPPLY
Replies: 36
Views: 1851

Re: USB PROBLEM: USB POWER SUPPLY

... The hub is a Trust 14591. It can not be externally powered. ... Is it this one: https://www.trust.com/en/product/14591-vecco-4-port-usb-2-0-mini-hub-black ? If so it's only suitable for use with low power devices eg. keyboards, mice, smaller (<32Gb**) usb-sticks etc. Generally HDD's will need t...

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