Re: Newest kernel 4.4.3-300.fc23.x86_64

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Tim:
>>> Just for curiosity's sake:
>>> 
>>> Have you tried different USB ports?  Some may not be supplying
>>> sufficient power (particularly those on flyleads, rather than a port
>>> directly on a motherboard or daughtercard), and a peripheral may
>>> act up.  

jarmo:
> And what makes here difference? If all works ok with
> 4.4.2-301.fc23.x86_64, but not with 4.4.3, change usb port?

I can see three potential vectors:

It could be a corner case, where your power supply is verging on the
point of being inadequate, and some change in the kernel has slightly
changed the power consumption of the PC.

Your peripheral might not be correctly asking for more current than the
default from the port, and a driver change has made that requirement
more stringent.  There's plenty of things that need more power than the
default, but don't bother to negotiate for it, they just presume that a
system is going to supply it (which is against the specs).  And, I dare
say, there's probably devices that use more current than the designers
thought it did.

Alternatively, the peripheral might be asking for more current, and a
new driver fault isn't complying.

But, I was only putting forward something else to consider.  Since
there's been quite a number of odd keyboard error reports about
keyboards mysteriously typing 5 by themselves, repeatedly, it does sound
more like there's something wrong with the keyboard decoding in the
kernel.

On the other hand, maybe there's been a batch of badly engineered
keyboard encoders, used in various different keyboards, that hasn't
reared its ugly head until now.

-- 
[tim@localhost ~]$ uname -rsvp
Linux 3.9.10-100.fc17.x86_64 #1 SMP Sun Jul 14 01:31:27 UTC 2013 x86_64

Boilerplate:  All mail to my mailbox is automatically deleted, there is
no point trying to privately email me, I only get to see the messages
posted to the mailing list.

I don't think it's pure coincidence that "officialdom" sounds the same
as "official dumb."



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