[G752VY, G751JY] everlasting bug of USB 3.0 left port randomly disconnecting

[hexaae]

It was a well known bug plaguing G751JY,
now my new G752VY does the same: the USB 3.0 port in the upper left side of the laptop keeps disconnecting and reconnecting randomly (sometimes after 1 hour, sometimes every few minutes). This can break streamings, copying actions, and damage the connected USB hard disk.

After all this time... is there a definitive solution from ASUS? Are they working on it or not?

[diogogmaio]

Keep up with the testing to understand if it is a viable solution.
Thanks for the hard work both of you.

[korimitsu]

I think I'm having the same issue on my Asus G751JY. Whenever I connect my USB 3.0 external hard drive the mouse freezes periodically:

MAD CATZ R.A.T. 3 MOUSE LAGGY JERKY MOVEMENT ON USB 3.0 PORT ON ASUS G751JY

[neoDD69]

Hi guys,
my G752VY have a randomly same problems with USB3.0., not so frequently.

Mouses, works weel, but with high load on external HD connected on the left USBs it run for few minutes and then problems to read and need a plug out-in to return operative.

I've read someone talked about the BIOS v.213: I'm testing from few days, some issue are solved (FANS at 100%, light of the cover/back, ecc),
but contain a very BAD ISSUE , see my post.
In my experience with the 213, the USB working bad ... mouses connected with HUB USB3.0 jump like kangaroo ... HD have a lot of retry.
I'm rollback to 212 just few minutes ago ... and now the PC works well ... USBs some times say goodbye ... but is much better than 213!

Cheers,
Davide - Italy

[Armesis]

I also have this problem lol, very very annoying. This laptop (g752vy) has had more problems than 3 of my pc's and 2 other laptops combined. Last asus im ever buying.

[JustinThyme]

Ill give you a definitive answer on this. The left side USB ports are on a small daughter board that includes a small controller and two USB connectors. Then a small ribbon where it plugs into the motherboard.
any drive that is NOT USB powered will run without a single glitch 100% of the time. If the drive draws its power from USB then its all about how much. Ive used multiple SSD drives with no issues at all and multiple spinners with no issues. Seagate backup plus 2.5" portables have given me no worries. 2 WD drives crap about every 10 minutes then if I unplug them and plug them back in they work for another 10. If its just streaming from them there is little issue, if its large file transfers the WD are guaranteed to crap 100% of the time.
Bottom line, its about power draw. That small daughter board is incapable of providing the power to run power hungry drives and run the data at the same time. Jump drives, no problems either.

[hexaae]

JustinThyme wrote:
Ill give you a definitive answer on this. The left side USB ports are on a small daughter board that includes a small controller and two USB connectors. Then a small ribbon where it plugs into the motherboard.

Yes, I've seen this on YT tear apart videos...

Bottom line, its about power draw. That small daughter board is incapable of providing the power to run power hungry drives and run the data at the same time. Jump drives, no problems either.

So for you it's a bad engineering design issue? WOW... and ASUS repeated this error in all recent ROG series? Hope truth is not SO bad and impossible to solve.

In the meanwhile here I've found other generic reports on USB3.0 issues since Windows 8+:
https://social.technet.microsoft.com/Forums/windows/en-US/e43de6f5-4ad5-4f09-8021-92aefb00480d/windo...

Nice thread anyway! Thank you all! 😉

[Julskey]

JustinThyme wrote:
Ill give you a definitive answer on this. The left side USB ports are on a small daughter board that includes a small controller and two USB connectors. Then a small ribbon where it plugs into the motherboard.
any drive that is NOT USB powered will run without a single glitch 100% of the time. If the drive draws its power from USB then its all about how much. Ive used multiple SSD drives with no issues at all and multiple spinners with no issues. Seagate backup plus 2.5" portables have given me no worries. 2 WD drives crap about every 10 minutes then if I unplug them and plug them back in they work for another 10. If its just streaming from them there is little issue, if its large file transfers the WD are guaranteed to crap 100% of the time.
Bottom line, its about power draw. That small daughter board is incapable of providing the power to run power hungry drives and run the data at the same time. Jump drives, no problems either.

Same goes for me. (1TB/1.5TB) WD pissport portable hdd randomly disconnects from left side ports. My Adata and Seagate and even usb powered enclosures work just fine.

[ROG_HARDCORE]

I've been testing it. Left And right, Copying 1GB Of files for full load test. So here's the result.

Upper Left ( supplpying 4.93V Consistent with 0.52A+- ( full load )


Lower Left ( supplpying 4.93V Consistent with 0.52A+- ( full load )


Upper Right ( supplpying 4.99V Consistent with 0.52A+- ( full load )


Lower Right ( supplpying 4.99V Consistent with 0.52A+- ( full load )


When no load test, 5.09V is on Right USB port But 5.02V on Left USB Port.

This test is done by copying 1GB files from 1TB Samsung portable USB Drive.


This test Proved that Left and right USB are not supplying the same amount of voltage , but same current.
But this differential should be safe for average device such as spinner HDD, SSD, or any equivalent rated 5V , 0.5A.
Doing this during Lan Party, since Tom Clancy : The division Server lagging for now. 2 ROG G752VY Reporting. 🙂

[hexaae]

Trying this now:
from BIOS 211 I've DISABLED "Legacy USB support". Let's see...
As far as I can understand I won't be able to boot from non-EFI USB boot devices though.

Just noticed a little change: that led on the external TrekStor USB 3.0 doesn't blink anymore in idle status, it's now always on.

[diogogmaio]

hexaae wrote:
Trying this now:
from BIOS 211 I've DISABLED "Legacy USB support". Let's see...
As far as I can understand I won't be able to boot from non-EFI USB boot devices though.

Just noticed a little change: that led on the external TrekStor USB 3.0 doesn't blink anymore in idle status, it's now always on.

If you find something new about this, let us know.
For a quick logic, you can safely disable that nowadays.
Thank you.