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by thagrol
Sun Jul 21, 2019 7:47 pm
Forum: General discussion
Topic: How does raspbian buster check for date and time without NTP
Replies: 2
Views: 221

Re: How does raspbian buster check for date and time without NTP

Try searching the raspbian docs/github for "fake-hwclock".
by thagrol
Sun Jul 21, 2019 6:35 pm
Forum: General discussion
Topic: Would USB-C type monitor work with Raspberry Pi 3?
Replies: 7
Views: 2369

Re: Would USB-C type monitor work with Raspberry Pi 3?

From reading other threads on here, don't expect video output over USB C to work. Well not unless the USB C connected device appears as a displaylink video adpator (or similar). It seems that the 4B's USB C port has just power, USB 2 and otg connections. Video cannot be routed from the GPU to the US...
by thagrol
Sun Jul 21, 2019 6:28 pm
Forum: General discussion
Topic: Raspberry Pi 4 usb boot?
Replies: 111
Views: 11792

Re: Raspberry Pi 4 usb boot?

If you don't mind using the SD card for an initial boot loader, you can run the OS off a USB drive. Just edit the cmdline.txt in /boot, and add "init=/sbin/usbroot.sh", rsync the OS from the SD card to the usb drive, then create a script "/sbin/usbroot.sh" that mounts the usb, runs pivot_root, and ...
by thagrol
Wed Jul 17, 2019 6:39 pm
Forum: Networking and servers
Topic: Pi NAS – 3 USB 3.0 HDDs and Raspberry Pi 4b 4GB RAM, Powered USB Hub Suggestion?
Replies: 4
Views: 332

Re: Pi NAS – 3 USB 3.0 HDDs and Raspberry Pi 4b 4GB RAM, Powered USB Hub Suggestion?

pi-anazazi wrote:
Wed Jul 17, 2019 11:04 am
Get an old (midi) tower computer case with power supply and build you NAS inside, running fine here for years and safes you a lot of pain.
Second that. Though in my case it's an old mini-ITX case...
by thagrol
Wed Jul 17, 2019 12:32 pm
Forum: Graphics, sound and multimedia
Topic: Pi for Downloaded Netflix Movies in Minivan!?
Replies: 1
Views: 118

Re: Pi for Downloaded Netflix Movies in Minivan!?

Have a look at libreelec: https://libreelec.tv/

It's a ready built media player OS for Pi. It uses kodi as the fornt end.

HDMI output would be easiest as VGA requires additional hardware.
by thagrol
Wed Jul 17, 2019 12:27 pm
Forum: General discussion
Topic: Raspberry Pi Zero W Power Abbilities
Replies: 5
Views: 225

Re: Raspberry Pi Zero W Power Abbilities

The zero and zeroW(H) don't have any onboard protection or limitation on the 5v lines.

The 5v pins on both micro USB sockets and the GPIO header are tied directly together.

I'd expect availble power for the LEDs to be whatever you PSU provides less that used by the Pi.
by thagrol
Tue Jul 16, 2019 6:26 pm
Forum: Networking and servers
Topic: Raspberry Pi 4 nas in PC Case
Replies: 6
Views: 311

Re: Raspberry Pi 4 nas in PC Case

I have a 500w EVGA? Power supply. That's the total power available over all rails on the PSU. Unfortunately it's not that simple. Those 500W are not split evenly across all voltages/rails. There should be a label on the PSU that breaks down how many amps are availble on which voltages. The pi alrea...
by thagrol
Tue Jul 16, 2019 5:54 pm
Forum: Networking and servers
Topic: Raspberry Pi 4 nas in PC Case
Replies: 6
Views: 311

Re: Raspberry Pi 4 nas in PC Case

Concidentally I've just repurposed an old Morex Venus 669 case into a Pi based NAS. No PC components in there though and a few tweaks are still needed. Some of this should be helpful to you. Check the output ratings on your PSU. If the case has an external laptop type power brick the available curre...
by thagrol
Tue Jul 16, 2019 11:49 am
Forum: Networking and servers
Topic: Howto: ethernet gadget on Pi4B USB C
Replies: 4
Views: 237

Re: Howto: ethernet gadget on Pi4B USB C

Notupus wrote:
Tue Jul 16, 2019 7:26 am
Can I do other USB gadgets such as a hid keyboard or a flash drive?
I've not done so but I would expect them to work.
by thagrol
Mon Jul 15, 2019 11:02 pm
Forum: Networking and servers
Topic: Howto: ethernet gadget on Pi4B USB C
Replies: 4
Views: 237

Re: Howto: ethernet gadget on Pi4B USB C

ejolson wrote:
Mon Jul 15, 2019 10:47 pm
Did you need to cut any power wires in the USB C cable to prevent backpowering from the Pi up to the host port?
I haven't done so but see my post here: https://www.raspberrypi.org/forums/view ... 8#p1500930
by thagrol
Mon Jul 15, 2019 10:55 pm
Forum: Troubleshooting
Topic: PI4 USB Boot
Replies: 20
Views: 1355

Re: PI4 USB Boot

... Which isn't old school at all. It's how every linux system with separate /boot and / partitions does it. Good point! I was referring to the way people used to boot older models from USB before the Pi3 and bootcode.bin method were available... Sorry. Didn't mean to imply that you were old school...
by thagrol
Mon Jul 15, 2019 9:50 pm
Forum: Advanced users
Topic: usb and direct power
Replies: 2
Views: 172

Re: usb and direct power

What drgeoff said. However I currently have a 4B and 1B connected via the 4B's USB C port and both are being powered via their GPIO headers. Probably not ideal if each have their own PSU (differing ground levels, output voltage variences etc) but in my case both Pi are bieng powered by the same ATX ...
by thagrol
Mon Jul 15, 2019 9:40 pm
Forum: Troubleshooting
Topic: PI4 USB Boot
Replies: 20
Views: 1355

Re: PI4 USB Boot

I'm very surprised that this hasn't been included on Pi 4 - USB boot is a critical feature because SD Cards are so stupidly fragile - a single power supply interrupt can completely destroy a card. Not this again :roll: HDD, SSD, USB flash storage, etc are also "stupidly fragile". A "single power su...
by thagrol
Mon Jul 15, 2019 3:04 pm
Forum: Networking and servers
Topic: Howto: ethernet gadget on Pi4B USB C
Replies: 4
Views: 237

Howto: ethernet gadget on Pi4B USB C

In case anyone wants to try it, here's how I got a 4B running as a USB ethenet gadget. Firstly, this only works on the USB C port not on the USB 2 or USB 3 ports. Because of this you may have to find another way to get power into the 4B. Requirements: Raspberry Pi 4B (any RAM size) and asociated cab...
by thagrol
Mon Jul 15, 2019 12:27 pm
Forum: Troubleshooting
Topic: Tell Raspbian to use SD Card for /boot and USB for /
Replies: 9
Views: 235

Re: Tell Raspbian to use SD Card for /boot and USB for /

I thought about putting only the bin file on the SD but then decided against it as if any updates come out you would have to manually copy the file over to the SD card as it’s not mounted anywhere. Going on a limb here: but why bother updating bootcode.bin? It's an early stage boot loader and won't...
by thagrol
Mon Jul 15, 2019 12:24 pm
Forum: Troubleshooting
Topic: Tell Raspbian to use SD Card for /boot and USB for /
Replies: 9
Views: 235

Re: Tell Raspbian to use SD Card for /boot and USB for /

Actually, with the older models you don't even need /boot on the card any longer. Just write a Raspbian image to your USB drive and copy the bootcode.bin file from the USB "boot" partition to a FAT32 SD card. Plug the bootcode.bin-only SD card and Raspbian imaged USB drive into the system and it sh...
by thagrol
Mon Jul 15, 2019 12:12 pm
Forum: Troubleshooting
Topic: SSH over USB with Raspberry Pi 3B?
Replies: 5
Views: 3586

Re: SSH over USB with Raspberry Pi 3B?

Hi, Shall You share the steps required for communicating Raspberry Pi 3 B+ with an Ubuntu Laptop, through SSH, with USBNET cable? I think USBNET cable need to be connected to one of the USB Host ports of Raspberry Pi 3 B+(not in USB slave port). Right? Neither RPi3B nor RPi3B+ has a USB slave port....
by thagrol
Sun Jul 14, 2019 5:30 pm
Forum: Troubleshooting
Topic: Mounted USB stick owned by root when console autologin, pi when desktop autologin
Replies: 6
Views: 127

Re: Mounted USB stick owned by root when console autologin, pi when desktop autologin

I think there is something more going on. I have only two entries in fstab for the two usb sticks I'm using. I've been renaming the mount point in fstab in order to see what is going on and despite there only being two entries in fstab I'm seeing all the old name under /media after a reboot, even p...
by thagrol
Sat Jul 13, 2019 11:57 pm
Forum: Other projects
Topic: Pi Zero W as USB dongle for a Tesla
Replies: 11
Views: 352

Re: Pi Zero W as USB dongle for a Tesla

zwieblum wrote:
Sat Jul 13, 2019 10:36 pm
CoW works on blocks, not files. And it's the bauty of snapshots that they are transparent to conumers.
Fair enough. I stand corrected though I still have doubts of the benefit of the added complexity.
by thagrol
Sat Jul 13, 2019 11:54 pm
Forum: Troubleshooting
Topic: Mounted USB stick owned by root when console autologin, pi when desktop autologin
Replies: 6
Views: 127

Re: Mounted USB stick owned by root when console autologin, pi when desktop autologin

"If you just want the stick mounted at boot time, you need to use either /etc/fstab or a systemd mount unit." Ok, thanks for the reply. I'll try that. It is pathetic that such a step is necessary in 2019. No, not at all. At least not when you consider where linux has come from (derived in many ways...
by thagrol
Sat Jul 13, 2019 11:20 pm
Forum: Troubleshooting
Topic: Setting up RPi Zero W as USB Gadget doesn't seem to be working properly
Replies: 2
Views: 59

Re: Setting up RPi Zero W as USB Gadget doesn't seem to be working properly

Need more information I'm afraid. Which USB gadget(s) are you trying to use? What USB cable are you using and which ports have you connected it to? And which way around? Can you post the following (use code tags) from the zero: /boot/config.txt /boot/cmdline.txt Your config script for the USB gadget...
by thagrol
Sat Jul 13, 2019 11:15 pm
Forum: Troubleshooting
Topic: Mounted USB stick owned by root when console autologin, pi when desktop autologin
Replies: 6
Views: 127

Re: Mounted USB stick owned by root when console autologin, pi when desktop autologin

Unless you've made changes to /etc/fstab the USB stick isn't being mounted when you (auto)login to the command line. What youre'see is the details for the mountpoint with nothing mounted on it. A mount point is just a directory, usualy empty somewhere in the file system. As such it has one set of pr...
by thagrol
Sat Jul 13, 2019 11:01 pm
Forum: Troubleshooting
Topic: I can´t boot from usb in pi 4
Replies: 74
Views: 3893

Re: I can´t boot from usb in pi 4

Just don't want to use a uSD card. That's not an unreasonable desire. I want to flash an OS to an USB drive, boot on it directly just out of the box like the pi3b+ without having to do it manually. Sadly that's currently not possible as was known before you joined this thread. The way you've gone a...
by thagrol
Sat Jul 13, 2019 10:56 pm
Forum: Troubleshooting
Topic: I can´t boot from usb in pi 4
Replies: 74
Views: 3893

Re: I can´t boot from usb in pi 4

When PC manufacturers stopped including floppy drives did you take the same attitude or did you apply a workaround buy providing your own? I'm assuming here, you're old enough to have been around during that time but given your obvious immaturity I doubt that's the case. Comparing end of life of fl...
by thagrol
Sat Jul 13, 2019 10:42 pm
Forum: Troubleshooting
Topic: I can´t boot from usb in pi 4
Replies: 74
Views: 3893

Re: I can´t boot from usb in pi 4

Concerning all other people, just responding to make fun on me, well you just giving the proof I was right concerning your mindset. As I said above, nobody is making fun of you. Some of us have commented on how you are coming across to us which is not the same thing at all. And the quote above just...

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