Author Topic: A random thread for small computing things that don't really warrant a thread of their own  (Read 102197 times)

Kim

  • Timelord
With Kim having solved the mystery, the observation that my laptop, when hibernating, emits a series of barely-audible high-pitched"eeeeee" noises is offered solely as anecdata.  It should't be making any noise while it's asleep.  If I unplug the power cable the noise stops ???

Probably a whistling (ie. physically vibrating) inductor in a switching power regulator when the power consumption is just so for causing it to resonate.  Tediously common in switching power supplies of all types, and makes up for the demise of CRT monitors with flyback transformers.

The best solution appears to be age-related sensorineural hearing loss.
To ride the Windcheetah, first, you must embrace the cantilever...

Mr Larrington

  • A bit ov a lyv wyr by slof standirds
  • Custard Wallah
    • Mr Larrington's Automatic Diary
Even forty years of listening to Motörhead has not filtered this out, though it's on the very edge of audibility.  In another decade it'll probably have gone out of range, but then so will the laptop in question.
External Transparent Wall Inspection Operative & Mayor of Mortagne-au-Perche
Satisfying the Bloodlust of the Masses in Peacetime

TheLurker

  • Goes well with magnolia.
Quote from: Kim
Quote from: Mr Larrington
With Kim having solved the mystery, the observation that my laptop, when hibernating, emits a series of barely-audible high-pitched"eeeeee" noises is offered solely as anecdata. {snip}

Probably a whistling (ie. physically vibrating) inductor in a switching power regulator when the power consumption is just so for causing it to resonate.  {snip}
And there was me thinking it was a mouse hopping from foot to foot (feet to feet?) cos it was standing on a hot resistor.  :)
Τα πιο όμορφα ταξίδια γίνονται με τις δικές μας δυνάμεις - Φίλοι του Ποδήλατου

Kim

  • Timelord
Quote from: Kim
Quote from: Mr Larrington
With Kim having solved the mystery, the observation that my laptop, when hibernating, emits a series of barely-audible high-pitched"eeeeee" noises is offered solely as anecdata. {snip}

Probably a whistling (ie. physically vibrating) inductor in a switching power regulator when the power consumption is just so for causing it to resonate.  {snip}
And there was me thinking it was a mouse hopping from foot to foot (feet to feet?) cos it was standing on a hot resistor.  :)

I used to have a computer mouse (early optical era) that would do just that when exposed to direct sunlight.  The pointer would act drunk until it cooled down a bit.
To ride the Windcheetah, first, you must embrace the cantilever...

T42

  • Tea tank
Anent resonance, my PC power-supply has started going zzzzeeezzzzezeezeeezzzzzezzzezzzezzzezzz etc lately. About 10 minutes in the pitch gradually descends, then it dies away. It's silent now, but the streamer I taped just above it is still floating gently on the breeze. Long may it fly.

If it does croak I can get the same model of PS again for 30€, but swapping it out? Eugh, work.
I've dusted all those old bottles and set them up straight.

ian

  • fatuously disingenuous
    • The Suburban Survival Guide
I did get a cheap charger for my ancient Macbook (I would have bought the Apple one, but they're expensive and it was guess work the computer wasn't just dead, and I'd already sunk £70 into a replacement battery, and it's a mid-2011 vintage) – anyway, the new battery I put in charges again, but now when it's powered by the charger, the trackpad goes increasingly more manic sending the cursor scuttling around the screen. (The mouse is fine.)

I presume this is a 'Chinese earthing' problem.
!nataS pihsroW

Kim

  • Timelord
I did get a cheap charger for my ancient Macbook (I would have bought the Apple one, but they're expensive and it was guess work the computer wasn't just dead, and I'd already sunk £70 into a replacement battery, and it's a mid-2011 vintage) – anyway, the new battery I put in charges again, but now when it's powered by the charger, the trackpad goes increasingly more manic sending the cursor scuttling around the screen. (The mouse is fine.)

I presume this is a 'Chinese earthing' problem.

Seems likely.  It's the usual tradeoff between having the class Y filtering capacitors between mains and earth to reduce RF emissions, and having leakage current through the capacitors bring the chassis up to half the mains voltage.  (Because, in spite of insisting on those stupid cloverleaf power leads, actually earth-referencing the PSU's output would be letting the terrorists win, or something.)  I suppose either condition could mess up the trackpad, which operates on an advanced form of voodoo that doesn't work well in the presence of stray voltages.
To ride the Windcheetah, first, you must embrace the cantilever...

Steph

  • Fast. Fast and bulbous. But fluffy.
A Thing started yesterday on my laptop, which is an HP on Windows 10. I have a mail icon, which opens up a window with my various accounts all listed as option. Press 'button', new window. Usual switching between inbox and sent, etc, plus switching from account to account. Nice and easy.

Yesterday, the Thing started. I press the button, and the window opens up. It stays there for about three seconds before closing completely. Bish, bosh, back to whatever window I was on before. I am able to read my mail by going to my account and hitting 'open inbox', but I can't run it as I have been doing. Any ideas as to why it is just disappearing after three seconds of visibility?
Mae angen arnaf i byw, a fe fydda'i

Thats strange! My tablet, a Lenovo tab 4, has developed the habit of closing some app's as soon as I open them, meaning I have to tap the icon three or four times before it will open, highly annoying, and I haven't a clue why.

woollypigs

  • Mr Peli
    • woollypigs
Should kinda also be in a politics thread

https://www.nytimes.com/2019/08/20/world/europe/denmark-cellphone-data-courts.html

10000 court cases needs to be checked cause phone location data.
Do join a demo near you - https://t.co/Ai5EfHuKUo

Mr Larrington

  • A bit ov a lyv wyr by slof standirds
  • Custard Wallah
    • Mr Larrington's Automatic Diary
Sorry, CoreTemp, but I don't believe that the CPU in that box over there ^^^^ is running at 15 deg. C when it's about 30 in here.
External Transparent Wall Inspection Operative & Mayor of Mortagne-au-Perche
Satisfying the Bloodlust of the Masses in Peacetime

Kim

  • Timelord
Sorry, CoreTemp, but I don't believe that the CPU in that box over there ^^^^ is running at 15 deg. C when it's about 30 in here.

Has someone set it to Gas Marks by mistake?
To ride the Windcheetah, first, you must embrace the cantilever...

Wading into the morass that is networking protocols, made more complicate by the need to access and configure the external drives using OSX. Wish me luck.
Sorting my life out, one shed at a time.

Wondering how to get more space into my ESXi server:-

Code: [Select]
Filesystem   Size   Used Available Use% Mounted on
VMFS-5       1.8T   1.0T    837.8G  55% /vmfs/volumes/datastore2
VMFS-5       1.8T   1.0T    813.9G  56% /vmfs/volumes/datastore1
VMFS-5     111.8G  39.7G     72.1G  35% /vmfs/volumes/datastore2ssd
VMFS-5     111.8G  37.7G     74.0G  34% /vmfs/volumes/datastore1ssd

Ideally I'd like to add two 4TB drives but there are not enough SATA ports or 3.5" HDD bays internally so I'd need to find an ESXi friendly SATA card and then use brackets to mount the 3.5" drives in the empty 5.25" drive bays.

But wondering since most of this would be for backup purposes (not storage I need under ESXi itself) whether I should go for a 4 bay NAS (or something like an HP Microserver) and do it that way.
"Yes please" said Squirrel "biscuits are our favourite things."

Cudzoziemiec

  • Solar powered, tea fuelled cycle-wol
Is Yahoo mail working for anyone? Everything else is working fine for me, just not that. Oh well, I'm not working today anyway!
sideways bounding monkey lounging under fruit tree

ian

  • fatuously disingenuous
    • The Suburban Survival Guide
BT's mail server seems to be down also (I think that used to be provided by Yahoo, but I thought wasn't any more). Anyway, it's not there. I will survive, Gloria, I truly will.
!nataS pihsroW

Cudzoziemiec

  • Solar powered, tea fuelled cycle-wol
It's probably been taken down by the Russians or maybe the Chinese. Or else Boris Johnson, who delegated the job of hacking Corbyn's tweets to Chris Grayling.
sideways bounding monkey lounging under fruit tree

TheLurker

  • Goes well with magnolia.
Is Yahoo mail working for anyone? Everything else is working fine for me, just not that. Oh well, I'm not working today anyway!
Yahoo's server* suffered a more or less world-wide borkage.  Details on therregister.co.uk if you're at all interested.

*I think they ran out of coal for it, that or they ran out of shillings for the meter.
Τα πιο όμορφα ταξίδια γίνονται με τις δικές μας δυνάμεις - Φίλοι του Ποδήλατου

Mr Larrington

  • A bit ov a lyv wyr by slof standirds
  • Custard Wallah
    • Mr Larrington's Automatic Diary
Thunderbird! asked! me! for! a! password! for! outgoing! Yahoo! mail! about! four! hours! ago!  Which is something it doesn't normally do, but expected incoming Babbage-Post appeared as normal.

In other news, dolt, you will find that your laptop behaves much more sensibly with regard to speed and not shutting the screen down every two minutes if the mains lead is actually plugged in.
External Transparent Wall Inspection Operative & Mayor of Mortagne-au-Perche
Satisfying the Bloodlust of the Masses in Peacetime

BT's mail server seems to be down also (I think that used to be provided by Yahoo, but I thought wasn't any more). Anyway, it's not there. I will survive, Gloria, I truly will.
BT were in the process of migrating all its customers emails to Office 365, but I understand that they stopped for some reason when they got about half way through.
Sorting my life out, one shed at a time.

Surfing the internet in 2019 - explained via the medium of 'Airplane!'  :demon:

https://twitter.com/HugdiSpencer/status/1171487383008579584
"Whoever fights monsters should see to it that in the process he does not become a monster. And when you look long into an abyss, the abyss also looks into you." ~ Friedrich Nietzsche

nicknack

  • Hornblower
Surfing the internet in 2019 - explained via the medium of 'Airplane!'  :demon:

https://twitter.com/HugdiSpencer/status/1171487383008579584
Brilliant!  ;D
There's no vibrations, but wait.