Your IdeaPad Y460p/Y560p starts to have a problem with audio whereby it stutters almost every interval of one minute. It seems to happen whenever a battery is attached.
How to troubleshoot this issue and get it resovled?
1 Download DPC Latency Checker: http://www.thesycon.de/deu/latency_check.shtml2 Connect the laptop to AC power with battery pack inserted (connected), start up,
then run DPC Latency Checker as sole application in full screen, you should see
one red 18 milliseconds long latency spike precisely once every 65 seconds,
see Pic 1.
In addition, play a low level audio recording and you will hear a one split-second
short (18 ms) synchronous audio drop out every 65 seconds as well.
3 Now, remove/disconnect the battery pack. Use only AC power. Repeat step 2.
You should see no more full scale red DPC spikes as seen in Pic 2 as well as hear no
more split-second audio drop out.
NOTE: occasional Latency peaks of up to about 6 ms are irrelevant and have no implications.
BIOS version 22 (3FCN22WW.exe) and newer version for IdeaPad Y460p/Y560p should solve this issue.
Please keep in mind that flashing the BIOS is a risky operation, therefore you are strongly recommended to follow these instructions properly.
Please NOTE: If your machine is unstable such as occasional freeze etc. do not try to flash the BIOS or your machine may be ruined for good if something goes wrong while flashing the BIOS.
If you are not seeing quite the same results as mentioned in the diagnosis section, you may have a different
problem and flash the BIOS is not the solution.
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This seems to be a solution for my issue.
I have the same DPC latency issue checked with LatencyMons. LatencyMons says there is something going on with my WLAN driver, which might be true, as when I disable my WLAN adapter LatencyMon does not detect a DPC issue. It mentions CPU throttling but it might be caused by the WLAN bug too.
The symptom is that the sound stutters periodically, like every 20 seconds when I listent to online content (Youtube, Spotify, etc) or play a game (like WoT). I could not test if disabling the WLAN is the "solution", as offline I cannot test Youtube e.g.
Important detail is that this issue appeared since I moved to Windows 10 1903...
Can you please advice if a BIOS refresh might be a solution, or better not touch it yet?
I tried several WLAN drivers from Realtek and from Lenovo and reinstalled the sound driver too. Yesterday, after uninstalling the WLAN driver fro mthe Device Manager and reinstalling it again I could not reproduce the problem with active WLAN. Youtube sound was flawless. Then I started my torrent client and Discord and the sound issue returned immediately. Since then I still have the issue even if no torrent is running or Discord is not active.
I don't think it's a device issue, as I had no problem with my laptop before moving to Windows 10 1903.
Your help is much appreciated. This continuous sound lag and stuttering is really annoying...
Ps: I have a Yoga 530-14ARR Laptop (ideapad) - Type 81H9
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