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michaelh99
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Posts: 30
Registered: ‎05-08-2017
Location: US
Views: 1,416
Message 1 of 9

Yoga 720 lightning port disconnecting

While testing out my new 720 I found that while running on battery I will have anything connected to the USB C/lightning port disconnect every once in a while and then almost immediately reconnect.

 

I've had this happen with an external SSD and a small multi-port dock.  So far, this problem only happens with that one port.  If I use the USB 3 ports, I haven't had this happen.

 

I'm fully up to date driver-wise.

 

I have also tried turning off the power settings for all the USB hubs.

 

I've monitored the windows events and see the following confirmation of a problem but I believe this to be a symptom and not the actual problem.

 

Warning        5/7/2017 1:53:19 PM        Ntfs (Microsoft-Windows-Ntfs)        140        None

Warning        5/7/2017 12:02:35 PM        Ntfs (Microsoft-Windows-Ntfs)        140        None

The system failed to flush data to the transaction log. Corruption may occur in VolumeId: M:, DeviceName: \Device\HarddiskVolume18.

(A device which does not exist was specified.)

The IO operation at logical block address 0x5f1388 for Disk 1 (PDO name: \Device\000000c7) was retried.

 

Any suggestions?

michaelh99
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Posts: 30
Registered: ‎05-08-2017
Location: US
Views: 1,357
Message 2 of 9

Re: Yoga 720 lightning port disconnecting

It looks like this could be a larger problem with either the type of external enclosure I'm using or with USB 3.1 controllers.

When connected to AC and with the following connected, I had a complete reset of the raid controller.

Crucial MX300 1TB M.2 (2280) Internal Solid State Drive (CT1050MX300SSD4)
Cable Matters USB-C Multiport Adapter with 4K HDMI or VGA Video, USB 3.0 and Gigabit Ethernet (Thunderbolt 3 Port Compatible) which uses a SMedia ASM1351 bridge
StarTech.com Portable M.2 SSD Enclosure for USB C Enabled Host, Aluminum (SM21BMU31C3)

At this point I couldn't even get the laptop to recognize the StarTech enclosure even after multiple reboots.

After shutting it down, disconnecting from AC (and driving home) I found that the drive could be mounted but as soon as I started copying files to it, raid reset.

I'm going to try a restore back to stock OS (I've put the latest Win 10 creators release) and see if some driver update I've made is at fault.

michaelh99
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Posts: 30
Registered: ‎05-08-2017
Location: US
Views: 1,341
Message 3 of 9

Re: Yoga 720 lightning port disconnecting

So far, so good.  I reset the BIOS and Windows and haven't put anything else on except for normal windows updates and a few app installs.  Here's hoping it was something avoidable.  I'll know more by the end of the day...

michaelh99
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Posts: 30
Registered: ‎05-08-2017
Location: US
Views: 1,318
Message 4 of 9

Re: Yoga 720 lightning port disconnecting

On the second day, he cried.  And then the murders began.

[google the second sentence to find out the joke]

 

Unfortunately while using the machine yesterday I unplugged it and within 30 seconds had a bus reset.  This time though there was nothing in the event logs.  I repeated this three times during the day.

 

My guess now is this issue is the the infamous USB C peripheral issue that's well known to other people.  This enclosure has a controller that isn't compatible with the 720 USB controller, or vice versa.

 

I transferred the SSD to a different enclosure (same manufacturer but different controller chipset) and the results are promising.  I figure I'll have final results by the end of today.

michaelh99
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Posts: 30
Registered: ‎05-08-2017
Location: US
Views: 1,244
Message 5 of 9

Re: Yoga 720 lightning port disconnecting

Well, I'm still seeing odd behavior but can't pin it down except as far as it's related to having a device connected to the lightning port.

 

If nothing is connected to USB C (but is connected to the other two USB 3 ports), there are no "resets" (I don't have a better word) and no odd events in the windows event viewer.

 

I'm waiting for a straight to USB C cable so that I can test the latest SSD enclosure

matoh
What's DOS?
Posts: 2
Registered: ‎05-16-2017
Location: US
Views: 1,176
Message 6 of 9

Re: Yoga 720 lightning port disconnecting

Hi, I'm curious if you have discovered any solution yet. 

 

I have the same problem connecting an external monitor with HDMI cable via usb-c to HDMI adapter. I have tried 3 adapters, 2 different HDMI cables and two Yoga 720 laptops (returned the first one). The problem persists. I used the same monitor with another PC without any problems, so it§s not that either...

 

I'm curious that I haven't seen many other mentions of this problem so far. But having 2 "faulty" units just seems unlikely. 

 

btw - mine is FHD, 12GB RAM, 512 SSD, Iron Grey version

matoh
What's DOS?
Posts: 2
Registered: ‎05-16-2017
Location: US
Views: 1,171
Message 7 of 9

Re: Yoga 720 lightning port disconnecting

also, I'm talking about 15" version with 1050GTX
michaelh99
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Posts: 30
Registered: ‎05-08-2017
Location: US
Views: 1,162
Message 8 of 9

Re: Yoga 720 lightning port disconnecting

Well, I ended up returning the vga/network  "dock" and switched to using a StarTech usb3.1 SSD enclosure and the disconnects have stopped.  I haven't found a "dock" that I've been willing to try again.

 

It sounds like the state of USB C is really bad and that's one of the reasons that Microsoft stayed away from it for the latest Surface refresh.

Qudek
What's DOS?
Posts: 1
Registered: ‎11-09-2018
Location: HR
Views: 358
Message 9 of 9

Re: Yoga 720 lightning port disconnecting

I have the same issue, with the external Samsung T5 ssd and the official usb-c dock from Lenovo, every 5 to 10 minutes or so the device disconnects and then reconnects instantly, when working with files from these devices it is almost unusable. Any known fix for this issue?

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