Personal computing discussed

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by notfred
Mon Jun 18, 2018 11:36 am
Forum: Networking
Topic: Need to replace AirPort Extreme setup.
Replies: 8
Views: 289

Re: Need to replace AirPort Extreme setup.

Just going to add yet another vote for a UniFi, got an AP-AC-LR at home and it is rock solid.
by notfred
Fri Jun 15, 2018 8:30 am
Forum: The Back Porch
Topic: DYMT: Imi's Legacy
Replies: 3031
Views: 116312

Re: DYMT: Imi's Legacy

About 20 years ago I was working on a project where we brought in a contract hardware engineer who was much older than me. We had been working together for a month or so before I realised that he had the same name as someone who used to work with my father. We compared notes and it was him, we had b...
by notfred
Thu Jun 14, 2018 12:01 pm
Forum: Processors
Topic: Intel Speculative Execution - yet another flaw
Replies: 1
Views: 337

Intel Speculative Execution - yet another flaw

Lazy FP state restore leaks state, including potentially your crypto keys: https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-00145.html https://twitter.com/cperciva/status/1007010583244230656 So far Intel only, not AMD. Guess I need to wait a bit longer to build a new PC: htt...
by notfred
Sun Jun 10, 2018 5:42 pm
Forum: Networking
Topic: USB NIC
Replies: 6
Views: 290

Re: USB NIC

The big problem with USB NICs is that what it says on the box basically has no resemblance to what the the actual chip is in the adapter. You really need to plug the adapter in and read the USB VID and PID, and even then you may need to look up the mapping to what the chip actually is versus its bad...
by notfred
Sat Jun 09, 2018 8:10 pm
Forum: General Hardware
Topic: Oak Ridge flops 200 Quadrillion times a second
Replies: 17
Views: 712

Re: Oak Ridge flops 200 Quadrillion times a second

Back when I worked at Fermi (and we were having issues with unexpectedly high DRAM soft errors) we actually investigated whether leakage from the Tevatron accelerator could be the culprit (it wasn't). Turned out the issue was the DRAM chip packaging itself (trace radioisotope contamination). When I...
by notfred
Fri Jun 08, 2018 8:22 pm
Forum: The Back Porch
Topic: DYMT: Imi's Legacy
Replies: 3031
Views: 116312

Re: DYMT: Imi's Legacy

Usacomp2k3 wrote:
The worst one is when someone on the conference puts it on hold instead of mute. Then everyone gets the elevator music!
I like Webex, you can go to the list of participants and the person talking / making a noise has an icon next to their name - very easy to find out who to mute!
by notfred
Wed Jun 06, 2018 3:15 pm
Forum: The Back Porch
Topic: DYMT: Imi's Legacy
Replies: 3031
Views: 116312

Re: DYMT: Imi's Legacy

At the end of the work zone, i try to get off the bump strip only to discover my power steering has totally failed and has hard locked Was it an actual mechanical failure? Or was it the vibration of the bump strip doing something nasty to the pump reservoir so it sucked air in to the power steering...
by notfred
Mon Jun 04, 2018 7:57 am
Forum: Networking
Topic: Need advice on home/consumer video conferencing
Replies: 8
Views: 651

Re: Need advice on home/consumer video conferencing

Sounds like what you are looking for is a Telepresence setup, but they are so expensive that they are a commercial thing. When you are talking life size, you want something like a 60"-70" screen driven at least at 1080. Think about the cost of that including cameras and the connectivity re...
by notfred
Thu May 31, 2018 8:49 am
Forum: General Hardware
Topic: Ticking and Popping Sound
Replies: 68
Views: 4304

Re: Ticking and Popping Sound

Do you have a UPS? Does the issue happen if running direct from the wall power without the UPS? Does it happen if you unplug the UPS from the wall and run from the UPS battery? I'm still suspecting something else stealing cycles like a graphics card or even a bad USB device where the processor has t...
by notfred
Tue May 29, 2018 9:15 am
Forum: Networking
Topic: Home Network Questions
Replies: 54
Views: 2785

Re: Home Network Questions

I have: Interwebs, Burgerhouse, ELVIS_is_the_king, plus because I'm in Canada someone has named theirs CSIS - spoilt slightly with an accompanying CSIS-guest SSID. Ours is a developed neighbourhood of mainly single family homes and I've got 52 neighbouring APs in range of my Unifi AC AP LR, next doo...
by notfred
Thu May 24, 2018 8:15 am
Forum: General Software
Topic: Online database for music library
Replies: 3
Views: 369

Online database for music library

I'm looking for an online database equivalent of MS Access or LibreOffice Base where I can store the catalogue for our band's music library. We currently have a laptop running LibreOffice Base but this means that only the laptop can access it. Access from Android, Chromebooks, i-Things is required. ...
by notfred
Wed May 23, 2018 8:40 am
Forum: TR Sports
Topic: Formula One 2018
Replies: 55
Views: 5911

Re: Formula One 2018

Ferrari have removed the winglets from the mirror mountings but still have the mirrors on the halo http://www.skysports.com/f1/news/12474/ ... ed-mirrors
It will be interesting to see if others follow this or stick with their current mirror mountings.
by notfred
Mon May 21, 2018 3:02 pm
Forum: General Hardware
Topic: Xbox One X - Display corruption/flickering at 4K fix?
Replies: 8
Views: 520

Re: Xbox One X - Display corruption/flickering at 4K fix?

According to Wikipedia, 4K at 60Hz is 14Gb/s and you are trying to drive that down a 5m cable. There's a whole bunch of signal integrity engineers who just curled up in to a little ball and started weeping after reading that! Slight variations in signal drive strength between the Xbox and the PC, or...
by notfred
Wed May 16, 2018 8:12 am
Forum: General Hardware
Topic: Ticking and Popping Sound
Replies: 68
Views: 4304

Re: Ticking and Popping Sound

With it getting worse across a sleep it sounds like some driver is not restoring something properly after the low power state. N.B. This could be a completely different driver in the system that ends up hogging the bus so the CPU doesn't get to talk to the sound card before the sound card's buffers ...
by notfred
Tue May 08, 2018 8:07 am
Forum: System Builders Anonymous
Topic: New futureproof C2Q rig: Please advise!
Replies: 61
Views: 5683

Re: New futureproof C2Q rig: Please advise!

One thing to be aware of is that the Meltdown fixes will have a lot more performance impact on the older CPUs that don't support the PCID and INVPCID instructions. See below the graph on https://arstechnica.com/gadgets/2018/01/heres-how-and-why-the-spectre-and-meltdown-patches-will-hurt-performance/...
by notfred
Fri May 04, 2018 8:13 am
Forum: Networking
Topic: The case of the invisible networked computers
Replies: 8
Views: 944

Re: The case of the invisible networked computers

For the last one check to see if the networking for the virtual guest is set to Bridged. If it is NAT or Host Only then that would explain why only the host can see it.
by notfred
Mon Apr 30, 2018 8:15 am
Forum: TR Sports
Topic: Formula One 2018
Replies: 55
Views: 5911

Re: Formula One 2018

I put that down as Verstappen's fault, he moved twice in the braking zone and it's something he has done before. It's also the team's fault, as EndUser says Ricciardo gave Verstappen room every time he passed him, but Verstappen caused them to make contact twice before the final collision that took ...
by notfred
Fri Apr 27, 2018 7:49 am
Forum: The Back Porch
Topic: Error messages
Replies: 4
Views: 1116

Re: Error messages

I was responsible for a driver for a router ASIC. Had some reports of odd behaviour coming in from the field so I setup a test to reproduce it. Sure enough an interrupt I hadn't seen before goes off deep in the ASIC. This was repeatable, with the right traffic pattern it would fire off immediately. ...
by notfred
Thu Apr 26, 2018 10:21 pm
Forum: The Back Porch
Topic: Error messages
Replies: 4
Views: 1116

Re: Error messages

by notfred
Tue Apr 24, 2018 12:37 pm
Forum: The Back Porch
Topic: DYMT: Imi's Legacy
Replies: 3031
Views: 116312

Re: DYMT: Imi's Legacy

Made me think of the Things I won't work with blog, e.g.
Azidoazide Azides
Dioxygen Diflouride

Of course there's his Sand Won't Save You This Time where he quotes Ignition!
by notfred
Sun Apr 22, 2018 6:30 pm
Forum: The Back Porch
Topic: DYMT: Imi's Legacy
Replies: 3031
Views: 116312

Re: DYMT: Imi's Legacy

Coaxial rotors like that immediately make me think Russian and those giant engine pods on the side look unique. A bit of Googling gives HA as Hungary on the registration, and Kamov as the main Russian coaxial helicopter manufacturer. I think it's a Kamov KA-26 'Hoodlum', which was in use by the Hung...
by notfred
Sat Apr 21, 2018 4:44 pm
Forum: The Back Porch
Topic: DYMT: Imi's Legacy
Replies: 3031
Views: 116312

Re: DYMT: Imi's Legacy

So this weekend is spring in Ottawa. Time to pack up the snowblower, get the bikes out and switch out the winter tyres on the cars for the summers. Last Monday, everything was under an inch or two of ice after a lot of freezing rain with the temperature hovering around 0C. This Monday is forecast to...
by notfred
Sun Apr 15, 2018 4:19 pm
Forum: TR Sports
Topic: Formula One 2018
Replies: 55
Views: 5911

Re: Formula One 2018

Those Ricciardo overtakes were awesome. That one on Hamilton at the hairpin where he came from so far back had me screaming at the TV, thinking there was no way he would get it slowed down enough and turned in and was about to crash, but "Sometimes you’ve just got to lick the stamp and send it ...
by notfred
Fri Apr 06, 2018 12:13 pm
Forum: Networking
Topic: 1.1.1.1 feels like 127.0.0.1?
Replies: 38
Views: 2872

Re: 1.1.1.1 feels like 127.0.0.1?

And we are done in this thread. Too much personal sniping and not enough discussing of the actual topic.
by notfred
Tue Apr 03, 2018 8:07 am
Forum: Networking
Topic: 1.1.1.1 feels like 127.0.0.1?
Replies: 38
Views: 2872

Re: 1.1.1.1 feels like 127.0.0.1?

This is a terrible demonstration of how poor the ISPs are. If they had a clue then their DNS server would be the best performing (local so shortest time of flight plus caching of popular results) plus do redirects to local cache appliances (Google, Netflix etc) and reduce their peering loads. I'm fo...
by notfred
Wed Mar 28, 2018 7:41 am
Forum: Networking
Topic: Home Network Questions
Replies: 54
Views: 2785

Re: Home Network Questions

The app will either take a picture of the QR code on the back of the AP or just scan for unmanaged APs and then let you control them directly without the need for a separate controller.
by notfred
Tue Mar 27, 2018 3:00 pm
Forum: Networking
Topic: Home Network Questions
Replies: 54
Views: 2785

Re: Home Network Questions

<Mod hat on> OK, that's enough, can we please get back to being nice to each other and discussing network equipment. Stop feeding the trolls or there will be consequences. <Mod hat off>
by notfred
Tue Mar 27, 2018 12:53 pm
Forum: Networking
Topic: Home Network Questions
Replies: 54
Views: 2785

Re: Home Network Questions

So to answer the burning questions, I had them run during construction when the walls were all open. Obviously, Its way cheaper to run the CAT6 during construction. All the runs terminate to a closet in my office. Yes, its overkill. No, I'm not going to use all of them for APs at least not right no...
by notfred
Tue Mar 27, 2018 8:49 am
Forum: Networking
Topic: Home Network Questions
Replies: 54
Views: 2785

Re: Home Network Questions

5 APs is a lot for normal North American wood construction. I've got mine mounted on the ceiling of our upstairs landing and it gives good coverage throughout the house and my kids have commented on the WiFi working across the street in a neighbour's house. I can see needing a couple more if your ho...
by notfred
Tue Mar 27, 2018 8:13 am
Forum: The Back Porch
Topic: DYMT: Imi's Legacy
Replies: 3031
Views: 116312

Re: DYMT: Imi's Legacy

There's Evergreen Craft Ales here in Ottawa. It is literally a guy (I think from high tech) brewing in his garage and selling cans on a Saturday afternoon. Just a thought for you JBI...