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by hippy
Sat Oct 21, 2017 11:56 am
Forum: Add-ons
Topic: USB monitor.
Replies: 6
Views: 480

Re: USB monitor.

Hippy, you wouldn't know which kernel you were using it on? Afraid not, but someone involved in delivering Raspbian may be able to tell you which Kernel versions support DisplayLink out of the box, and I would expect that to be documented somewhere. Added: Whatever was out there around 26 Jan 2017,...
by hippy
Wed Oct 18, 2017 10:19 am
Forum: Python
Topic: What can be done about Python 3.5 slowness?
Replies: 43
Views: 935

Re: What can be done about Python 3.5 slowness?

Python 2 - Total instructions: 23834029 Python 3 - Total instructions: 47543516 That seems to fit with the suggestion that Python 3 is simply doing more than Python 2 and doing things differently. A reflection of how the code has been refactored and developed, the addition of checks or changes, how...
by hippy
Tue Oct 17, 2017 11:01 am
Forum: Python
Topic: What can be done about Python 3.5 slowness?
Replies: 43
Views: 935

Re: What can be done about Python 3.5 slowness?

I'm using Python 3.5 in Stretch Lite on a B+ with a 32GB Samsung Evo+ SD and it's slowwwwwww. More than three times slower than 2.7.13 when doing a simple pass statement. What can be done about this? Not a lot. The general consensus is that Python 3.x is slower than Python 2.7 and that is unlikely ...
by hippy
Mon Oct 16, 2017 10:28 am
Forum: General discussion
Topic: Deleting posts
Replies: 5
Views: 305

Re: Deleting posts

Thanks to everyone who suggested an answer to the question.
by hippy
Sun Oct 15, 2017 5:13 pm
Forum: General discussion
Topic: Deleting posts
Replies: 5
Views: 305

Deleting posts

How does one set about deleting one's own post in a thread which has been locked?

Once a thread has been locked only the "Report this post" option is available.
by hippy
Sat Oct 14, 2017 8:53 am
Forum: Beginners
Topic: Powering Pi Zero with a 240V AC - 5V DC module
Replies: 14
Views: 529

Re: Powering Pi Zero with a 240V AC - 5V DC module

Is anyone using a 240V AC to 5V DC power module like this: https://www.aliexpress.com/store/product/3pcs-AC-DC-5V-2-5A-Switching-Power-Supply-Module-5V-2500MA-Bare-Circuit-Board-for/1829717_32760575162.html?isOrigTitle=true Yes, I am doing exactly that and using something very similar to power my P...
by hippy
Sat Oct 14, 2017 7:53 am
Forum: Add-ons
Topic: USB monitor.
Replies: 6
Views: 480

Re: USB monitor.

Displaylink worked fine for me on a Pi 3B under Raspbian Jessie. Support for Displaylink is built in so it works out of the box and there is no longer any need to recompile kernels. I haven't checked to see if that's still the same since updating to Stretch. The generic Displaylink adapters I have c...
by hippy
Mon Oct 09, 2017 12:42 pm
Forum: General discussion
Topic: SD card permanently write protected???
Replies: 18
Views: 789

Re: SD card permanently write protected???

I suspect some command from the Pi to the card is getting corrupted and interpreted as a write-protect command some times. FWIW my gut feeling is that there may be some lurking issue, h/w or s/w, that can cause premature SDCard failure. Having written my own SD card interface code for a microcontro...
by hippy
Sat Sep 16, 2017 12:54 pm
Forum: General discussion
Topic: The one and only change I would make to the Raspberry Pi
Replies: 38
Views: 1568

Re: The one and only change I would make to the Raspberry Pi

What "systematic bullying"? I don't see any bullying going on here. And that's part of the problem. Nothing personal in there. Really ? The very first reply started "Do you really thing the folks at the Raspberry Pi Foundation are a bunch of morons that don't have two brain cells to rub together be...
by hippy
Sat Sep 16, 2017 12:29 pm
Forum: General discussion
Topic: The one and only change I would make to the Raspberry Pi
Replies: 38
Views: 1568

Re: The one and only change I would make to the Raspberry Pi

It's more like my old school teachers making snarky comments and putting us kids down when we were silly. There was nothing snarky nor silly about what the OP posted. There was no need to put the OP down. To me that's just trying to defend the indefensible. It's why institutionalised and systemic b...
by hippy
Sat Sep 16, 2017 12:17 pm
Forum: General discussion
Topic: The one and only change I would make to the Raspberry Pi
Replies: 38
Views: 1568

Re: The one and only change I would make to the Raspberry Pi

DougieLawson wrote:
Sat Sep 16, 2017 10:26 am
When you've been on here a few years you'll also be 100% sick of one of these threads turning up every week.
You do know that you can just ignore things you don't like ? You do know that you are not obliged to respond to every post made ?
by hippy
Sat Sep 16, 2017 12:13 pm
Forum: General discussion
Topic: The one and only change I would make to the Raspberry Pi
Replies: 38
Views: 1568

Re: The one and only change I would make to the Raspberry Pi

Are the aggressive replies really necessary? For some people it seems yes. The OP had the audacity to question a decision the Foundation made and it seems some people just won't stand for that - Burn the heretic! Stone the unbeliever! It's not just here that we see it, it seems to be a political an...
by hippy
Fri Sep 15, 2017 1:15 pm
Forum: General discussion
Topic: About installing Ubuntu Mate on Raspberry pi3 model B
Replies: 3
Views: 222

Re: About installing Ubuntu Mate on Raspberry pi3 model B

Not sure what light there is to shed. I installed Ubuntu Mate on a Pi 3B following whatever instructions there were and I recall it worked okay and as expected as far as I used it. Then I decided Raspbian was better for me and went back to that. Get a second SD Card, install Ubuntu Mate on that, boo...
by hippy
Fri Sep 15, 2017 12:57 pm
Forum: General discussion
Topic: Pi3 Just crashed and corrupted my flash drive
Replies: 5
Views: 370

Re: Pi3 Just crashed and corrupted my flash drive

Are all your computers Linux machines? Seems unlikely you would be backing up a Windows or Mac to an ext4 formatted partition on a USB stick. Could be via a NAS using USB for storage; Windows ( and I guess Mac ) could see it as a share and not care how things on the media actually were. I have lost...
by hippy
Thu Sep 14, 2017 10:25 pm
Forum: Troubleshooting
Topic: [Closed] Raspi-Config hangs Pi 3B
Replies: 3
Views: 203

Re: Raspi-Config hangs Pi 3B

Repeated the same process on a Pi Zero W and no problems, so presumably not some systemic issue with Stretch or raspi-config and I'll have to put it down to some glitch or non-repeatable event.
by hippy
Thu Sep 14, 2017 8:56 pm
Forum: Other languages
Topic: Golang for beginners on Raspberry Pi Guide Copyright question
Replies: 5
Views: 784

Re: Golang for beginners on Raspberry Pi Guide Copyright question

You should note and acknowledge any trademarks of the Foundation and others. You would not usually have to note any copyrights but you may need permission if using any copyrighted material yourself, and it is always good practice to acknowledge when such permission has been granted. That can also ap...
by hippy
Thu Sep 14, 2017 1:59 pm
Forum: Networking and servers
Topic: Is it any possible to convert analog phone to IP phone using Raspberry PI
Replies: 9
Views: 411

Re: Is it any possible to convert analog phone to IP phone using Raspberry PI

I would also suggest that, for most people, a dedicated VOIP phone which just plugs into the router, or a unit which sits between the router and an analogue phone, will be much easier and probably cheaper than trying to get an analogue phone connected to a Pi and used for VOIP.
by hippy
Thu Sep 14, 2017 12:43 pm
Forum: Troubleshooting
Topic: Raspbian Stretch problems / changes
Replies: 14
Views: 919

Re: Raspbian Stretch problems / changes

Yes, that seems to be correct. AIUI: 1) With the old naming convention and just one Ethernet or Wi-Fi interface ... eth0 / wlan0 2) With the old naming convention and two Ethernet or Wi-Fi interfaces ... eth0 + eth1 / wlan0 + wlan1 3) On a system with predictable naming and just one Ethernet or Wi-F...
by hippy
Thu Sep 14, 2017 10:19 am
Forum: Python
Topic: Python speed, benchmarks, 2v3
Replies: 18
Views: 1070

Re: Python speed, benchmarks, 2v3

Those speed tests are interesting. The takeaway from that for me would be that 3.6 is generally faster than 2.7, few cases where there would be an advantage to using 2.7. But that is at odds with the real world experiences of many, which seems to take us back to "beware of benchmarks", that benchmar...
by hippy
Wed Sep 13, 2017 6:03 pm
Forum: Troubleshooting
Topic: Raspbian Stretch problems / changes
Replies: 14
Views: 919

Re: Raspbian Stretch problems / changes

For me it's now predictable as I know what they will be called, eth0, wlan0, wlan1. Simples. But what guarantee is there that wlan0 is X and wlan1 is Y and not the other way round ? It may seem to be, but AIUI it's not always guaranteed to be, though I believe one can take additional steps to force...
by hippy
Wed Sep 13, 2017 5:53 pm
Forum: Troubleshooting
Topic: [Closed] Raspi-Config hangs Pi 3B
Replies: 3
Views: 203

Re: Raspi-Config hangs Pi 3B

The HDMI monitor must be powered on and connected before boot / rebooting. If not connected the RPi will revert to composite mode. That's a good point though for me if the monitor (TV) is on it comes up on HDMI at 1080p, with it off (standby) it still chooses HDMI but at 640x480. I haven't edited c...
by hippy
Wed Sep 13, 2017 5:33 pm
Forum: Python
Topic: Python speed, benchmarks, 2v3
Replies: 18
Views: 1070

Re: Python speed, benchmarks, 2v3

But perhaps from a simple point of view, you loose speed by making it more flexible and feature rich, debugging rich and/or a move to optimise for memory Vs speed. I think that is mostly it. Some 'improvement' or change somewhere adds an instruction or two. Data structures change, access code conse...
by hippy
Wed Sep 13, 2017 12:19 pm
Forum: Python
Topic: Python speed, benchmarks, 2v3
Replies: 18
Views: 1070

Re: Python speed, benchmarks, 2v3

I suppose the message is 'beware of benchmarks' - check the actual app and choose accordingly. That's very true; which is faster and by how much does seem to depend on exactly what one is doing. The problem seems to be that no one really knows why or what things are faster or slower so it's impossi...
by hippy
Wed Sep 13, 2017 11:26 am
Forum: Troubleshooting
Topic: Distributable Bash Scripts with Predictable Network Interface Names?
Replies: 7
Views: 260

Re: Distributable Bash Scripts with Predictable Network Interface Names?

Things would be greatly alleviated if there were a well defined and catered for means of referring to 'the only NIC I have' which is how "eth0" was often taken to mean. Perhaps it falls to application and utility coders to accept and handle wildcards, eg 'eth*', 'en*' or even 'e*' which should hand...
by hippy
Wed Sep 13, 2017 11:05 am
Forum: Troubleshooting
Topic: Distributable Bash Scripts with Predictable Network Interface Names?
Replies: 7
Views: 260

Re: Distributable Bash Scripts with Predictable Network Interface Names?

see also https://www.raspberrypi.org/forums/viewtopic.php?f=28&t=193142#p1210463 so new versions will not have this issue Though anyone writing a bash script to share will have to consider that others may have re-enabled predictable naming. It is not clear to me what "Disable predictable network in...

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