From Newsgroup: alt.comp.os.windows-10

Why are USB-connected items repeatedly being disconnected and connected?

This started with the SD card in its little slot. I finally pulled it
half-way out and that stopped that.

But now I see that the mouse is doing the same thing, even though I
haven't noticed the mouse ever not working. The mouse is connected
through a 4-outlet hub, but so are the keyboard and one other thing I
can't remember right now. :-(

Is it just a bad connection? I've changed which port I'm using. The
laptop itself doesn't have enough ports to not use a hub.

The Acer laptop beeps when the status changes, so much I had to turn the
volume of system sounds down to just above zero. It's not nearly as
annoying now, but I'd like to understand.

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From Newsgroup: alt.comp.os.windows-10

On Sun, 1/11/2026 12:07 PM, micky wrote:

Why are USB-connected items repeatedly being disconnected and connected?

This started with the SD card in its little slot. I finally pulled it half-way out and that stopped that.

But now I see that the mouse is doing the same thing, even though I
haven't noticed the mouse ever not working. The mouse is connected
through a 4-outlet hub, but so are the keyboard and one other thing I
can't remember right now. :-(

Is it just a bad connection? I've changed which port I'm using. The
laptop itself doesn't have enough ports to not use a hub.

The Acer laptop beeps when the status changes, so much I had to turn the volume of system sounds down to just above zero. It's not nearly as
annoying now, but I'd like to understand.

The thing you can't remember, is a portable disk drive
drawing almost the entire bus power was on the hub.

Inspect your SD slot, for a bent or shorted power pin.

If you had a USB power meter, this would allow distinguishing
between a power problem, and a protocol problem. You need extender cables
of various flavors, to fit one of those in-line with the defective kit
(to measure the power consumption causing the fuse to open). Such devices
have an In and an Out for USB-A, and an In and an Out for USB-C, and you
test only one flavor of USB at a time. A or C, but not both at the same time.

https://www.amazon.ca/MakerHawk-Multimeter-Voltmeter-Capacity-Resistance/dp/B07DCSNHNB

The power meter won't run, if the bus power is denied by the computer/hosting end.
At shut down, some computers turn off VBUS to peripherals. Others have
left that running (running off +5VSB).

Paul
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From Newsgroup: alt.comp.os.windows-10

In alt.comp.os.windows-10, on Sun, 11 Jan 2026 16:59:26 -0500, Paul <nospam@needed.invalid> wrote:

On Sun, 1/11/2026 12:07 PM, micky wrote:

Why are USB-connected items repeatedly being disconnected and connected?

This started with the SD card in its little slot. I finally pulled it
half-way out and that stopped that.

But now I see that the mouse is doing the same thing, even though I
haven't noticed the mouse ever not working. The mouse is connected
through a 4-outlet hub, but so are the keyboard and one other thing I
can't remember right now. :-(

Is it just a bad connection? I've changed which port I'm using. The
laptop itself doesn't have enough ports to not use a hub.

The Acer laptop beeps when the status changes, so much I had to turn the
volume of system sounds down to just above zero. It's not nearly as
annoying now, but I'd like to understand.

The thing you can't remember, is a portable disk drive
drawing almost the entire bus power was on the hub.

You're semi-right. I do have an external drive dock cable, but a) the
dock is almost always off, b) it has its own power supply, and most of
all, c) it's been removed and taken downstairs for almost a year, so
it's not even there.

The other 3 ports are used by the mouse, the keyboard, and an LED lamp
that is almost always off. I tried to use low-draw devices.

Inspect your SD slot, for a bent or shorted power pin.

I don't see a bent one. I'll get a meter and check for shorted, but....
it has a 3.7meg 45 minutes mp4 file on it that plays just fine.

If you had a USB power meter, this would allow distinguishing

Yes, I have to find it.

between a power problem, and a protocol problem. You need extender cables
of various flavors, to fit one of those in-line with the defective kit
(to measure the power consumption causing the fuse to open). Such devices >have an In and an Out for USB-A, and an In and an Out for USB-C, and you
test only one flavor of USB at a time. A or C, but not both at the same time.

https://www.amazon.ca/MakerHawk-Multimeter-Voltmeter-Capacity-Resistance/dp/B07DCSNHNB

The power meter won't run, if the bus power is denied by the computer/hosting end.
At shut down, some computers turn off VBUS to peripherals. Others have
left that running (running off +5VSB).

Paul

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From Newsgroup: alt.comp.os.windows-10

On Sun, 11 Jan 2026 12:07:24 -0500, micky <NONONOmisc07@fmguy.com>
wrote:

Why are USB-connected items repeatedly being disconnected and connected?

This started with the SD card in its little slot. I finally pulled it >half-way out and that stopped that.

But now I see that the mouse is doing the same thing, even though I
haven't noticed the mouse ever not working. The mouse is connected
through a 4-outlet hub, but so are the keyboard and one other thing I
can't remember right now. :-(

Is it just a bad connection? I've changed which port I'm using. The
laptop itself doesn't have enough ports to not use a hub.

I have the same thing, but with Windows XP.

I have a 4-port hub, but with Windows XP.

It has a printer and a (mostly switched off) external hard drive (with
its own power supply).

If I plug in a USB flash drive at just the right moment of boot-up, it connects, but sometimes it doesn't. Then I book in safe mode, shut
down, switch off, and try again. Or, if I take out the flash frive and
plug it into the computer directly, it sometimes works.
--
Steve Hayes from Tshwane, South Africa
Web: http://www.khanya.org.za/stevesig.htm
Blog: http://khanya.wordpress.com
E-mail - see web page, or parse: shayes at dunelm full stop org full stop uk --- Synchronet 3.21a-Linux NewsLink 1.2

From Newsgroup: alt.comp.os.windows-10

In alt.comp.os.windows-10, on Mon, 12 Jan 2026 15:18:00 +0200, Steve
Hayes <hayesstw@telkomsa.net> wrote:

On Sun, 11 Jan 2026 12:07:24 -0500, micky <NONONOmisc07@fmguy.com>
wrote:

Why are USB-connected items repeatedly being disconnected and connected?

This started with the SD card in its little slot. I finally pulled it >>half-way out and that stopped that.

But now I see that the mouse is doing the same thing, even though I
haven't noticed the mouse ever not working. The mouse is connected
through a 4-outlet hub, but so are the keyboard and one other thing I
can't remember right now. :-(

Is it just a bad connection? I've changed which port I'm using. The >>laptop itself doesn't have enough ports to not use a hub.

I have the same thing, but with Windows XP.

I have a 4-port hub, but with Windows XP.

It has a printer and a (mostly switched off) external hard drive (with
its own power supply).

If I plug in a USB flash drive at just the right moment of boot-up, it >connects, but sometimes it doesn't. Then I book in safe mode, shut
down, switch off, and try again. Or, if I take out the flash frive and
plug it into the computer directly, it sometimes works.

Wow. I think you have a worse case than I do. ;-(
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