luv-main January 2018

luv-main@luv.asn.au

26 participants
11 discussions

by Piers Rowan

Hi there! We have moved to GMail from our own servers. For good reasons I have 4 mailboxes that I use. (At least one of which receives 200 messages per hour with a rule in place to move some of the content into folders). I am using Thunderbird right now and the performance of GMail vs our Dovecot (Linux IMAP server) is sluggish. In addition mail takes longer to arrive and polling seems to cache old message lists. Given that we cannot move away from GMail is it a client issue? Is there a better client? Any feedback welcomed. Have a great day. P

5 years

suspend resume macbook pro

by Brian May

Hello, I have installed Debian/stretch on a MacBook Pro, and it all seems OK, except suspend/resume is now suspend/crash instead. Sometimes I get a black screen, most times the screen gets restored and then it crashes. Furthermore, I was accidentally pressing the power button and shutting down the system, so changed this action to suspend. Now instead of a clean shutdown, I get a dirty crash whenever I accidentally press the power button :-| Maybe should change that to ignore for now... How do I go about debugging suspend/resume problems? Online reports seem to indicate that there should be no problems with suspend/resume and a recent kernel. Regards

5 years

iview and flv files

by Russell Coker

Files produced by python-iview give errors like the following when I try to play them with mplayer. Anyone have suggestions for how to deal with it? The files produced last year were ok but it seems that something changed at the ABC so files downloaded this year don't work. $ mplayer IN1501H016S00MA1D1_20171216030611_650000.flv MPlayer 1.3.0 (Debian), built with gcc-7 (C) 2000-2016 MPlayer Team do_connect: could not connect to socket connect: No such file or directory Failed to open LIRC support. You will not be able to use your remote control. Playing IN1501H016S00MA1D1_20171216030611_650000.flv. libavformat version 57.83.100 (external) libavformat file format detected. LAVF_header: av_find_stream_info() failed LAVF: no audio or video headers found - broken file? libavformat file format detected. LAVF_header: av_find_stream_info() failed LAVF: no audio or video headers found - broken file? -- My Main Blog http://etbe.coker.com.au/ My Documents Blog http://doc.coker.com.au/

5 years

iView challenges

by Mark Trickett

5 years

Printing issues

by Mark Trickett

Hello All, I am having mixed results printing on a Debian Stretch 64 bit system with a HP LJ4+. I can print postscript from the command line, I can get the test page to print, but nothing from LibreOffice 5 nor a text editor such as leafpad. There is some data sent to the printer, but it just sits there and taking off line and pressing the form feed does not produce a page, even a partial page of something. Adding to the insult, I cannot set it up as a second printer, but non-postscript. I am far from impressed, it is now an unduly complicated mix of bits and pieces that is difficult to follow and sort and read to see the configuration and understand to debug. Regards, Mark Trickett

5 years

Network Security Device

by Robert Brown

Does this: https://www.kickstarter.com/projects/akita/akita-instant-privacy-for-smart-… do anything special that is not already available in linux software? Apart from a neat packaging exercise of course? The description includes: "Connected to a LAN port on your router, Akita scans your network for any unusual activity and immediately shuts it down. All-the-while letting you know an attempt was made to invade your privacy. Akita uses military-grade security protection that’s been retrofitted for the home. Then, if you run into any issues, we can remotely preserve and restore your privacy with the help of our always on-call privacy experts at Axi.us. Akita uses threat intelligence, behavioral analysis, machine learning and doesn't slow your connection at all. Importantly, it doesn't use deep packet inspection."

5 years

Debian/stretch screen corruption/hangs

by Brian May

Hello, I seem to be having an increasing problem on my Thinkpad Carbon X1 2015, where: * The screen will lose sync. Like it is an older analogue monitor. Sometimes it will come good after 1 second. Other times a suspend/resume will solve this. Some videos showing the problems: https://photos.app.goo.gl/g71psLYXEfcNK1Vx1 - the black screen with dots is uncommon, the scrolling display is more common. This is with *one* emacs window shown at full screen. * The screen will flash bright for a second, go back to normal, and then the computer will completely freeze. * These above symptoms typically happen in response to a keypress at a terminal window (gnome terminal and xterm both affected). Especially the down button or escape key, but these aren't the only ones. Happens with no external devices plugged in. * wayland/xorg gnome/kde/awesome/etc all have the same problem. Have latest Debian/stretch with latest security updates. It is possible that a regression in a security update has caused increased problems, but I am doubtful. At first I thought this was a hardware problem. Which means I should try to get it fixed under warranty. But: * Built in tests all pass. * The problem is not reproducible under Windows. * I installed Debian/stretch (brand new install) on a very different computer - a MacBook Pro, and encounter - what appears to be - exactly the same symptoms. Although the "lost sync" affect doesn't last as long. The only thing in common is both have high resolution displays. I reduced the resolution on the Thinkpad, just in case, but still get similar problems. This MacBook Pro works fine with OSX. Any ideas? This is making Linux on these computers unusable, I never know when it is going to crash. In practice, times are often very short, or worst time (e.g. 2nd time entering this email... This time under OSX). Regards

5 years

Re: AWC EC2 queries vs self hosting and other options for a email services

by Andrew McGlashan

Hi, On 03/01/18 09:09, Paul van den Bergen via luv-main wrote: > OK. As of reinvent 2017, AWS introduced bare metal server pricing. As > far as I understand it, if the hardware breaks, you get a new machine, > but it's up to you to manage DR. > > dedicated instances - it's a long term contract for a VM (not a bare > metal machine) > > on demand - you pay per hour. Typically you want a mailserver running 24/7, so about 750 hours every month. > spot price - you pay "bid" for a low priced VM. If someone outbids you, > you lose the VM. Do you mean, you have a box, working... then you get outbid and lose a working box? Kind Regards AndrewM

5 years

Intel CPUs

by Russell Coker

https://www.fool.com/investing/2017/12/19/intels-ceo-just-sold-a-lot-of-sto… https://www.theregister.co.uk/2018/01/02/intel_cpu_design_flaw/ Lev just tweeted the above links. This is annoying, it means rebooting all systems with Intel CPUs for which security is important and also ongoing performance loss for all modern systems with Intel CPUs. People who care about performance not security (EG gamers and people who mostly do compiles) could run in a less secure mode (run an old kernel or maybe a newer kernel patched to turn off this security feature). I guess the lesson from this and the previous security issues is to just avoid Intel CPUs. It's what Intel's CEO expects us to do.

5 years

Re: AWC EC2 queries vs self hosting and other options for a email services

by Colin Fee

On 2 Jan 2018 5:15 pm, "Brian May via luv-main" <luv-main(a)luv.asn.au> wrote: Andrew McGlashan via luv-main <luv-main(a)luv.asn.au> writes: > Okay, the problem pricing may be related to "Amazon EC2 Dedicated > Instances" ... that seems the closest (from what I can tell), to having > your own physical server and being able to do with it what you like. > > Perhaps this product is way overkill. If I am reading that correctly, sounds like you get exclusive access to the hardware. i.e. not a VM. So, probably will cost more. Correct. In AWS 'dedicated instances' are exclusive access to the hardware, typically there most expensive option. Last I looked, the reserved instance stuff was the cheapest. Although was somewhat confusing for me to understand initially, and I had to complain to Amazon when their website stuffed things up.... IIRC, if you have a reserved instance, then the hourly fees get reduced significantly (but are still payable). So the total payable is less. I think there might have been two types of reserved instances, but I have forgotten this stuff already. Reserved instances are the cheapest option. They come in full-upfront and partial-upfront versions and can be bought for 1, 2, or three years. Full-upfront is the most economical where as the name suggests you pay fully upfront for the resources you think you will need. There are some limitations on the elasticity of what you buy and of course if you end up using less than you paid for you lose out. Last time I talked to our account manager you can save up to 48% using the right RIs. Even with the reserved instance, you probably find you will end up paying more then for an alternative provider. At least that is what I found several years ago, when I moved to Hetzner instead. > I also find that all (or too many, if not all) AWS pages are super > resource hungry and cause performance issues (that is, their website > pages detailing the products on offer). This may be due to me using > Palemoon -- which is a fork of Firefox; I actually use a combination of > browsers, Firefox [due to how they have changed since version 57 in > particular], is used much less by myself now. No argument here. -- Brian May <brian(a)linuxpenguins.xyz> https://linuxpenguins.xyz/brian/ _______________________________________________ luv-main mailing list luv-main(a)luv.asn.au https://lists.luv.asn.au/cgi-bin/mailman/listinfo/luv-main

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luv-main January 2018