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IDProjectCategoryView StatusLast Update
0001594K18X001.00 SKB SWANSWpublic2023-04-11 15:23
Reporter(ALTech) Sangmin Choi Assigned To(ALTech) Sangmin Choi Due Date2023-01-11 09:00
PrioritynormalSeveritys4-minorReproducibilitysometimes
Status closedResolutionfixed 
Summary0001594: There is a screen flash in specific application.
DescriptionThere is a screen flash in specific application.

You can see the attached video(screen_flash.mp4), I can't reproduce it, but SKB testers can reproduce it.
SKB testers reproduced it with different STBs and TVs.
Also, this issue was only reproduced with SWAN, other models(EAGLE or other vendor's AI2) doesn't have this issue.

Could you please check this issue?
This issue was happened when the tester moved his character in any maps.

// install the application
$ adb install zemexplore.apk

// run the application
$ adb shell am start -a android.intent.action.MAIN -n com.skb.zemexplore/.MainActivity

I also attached the video(running_guide.mov) about running this application, because this application was made by Korean language.


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(ALTech) Sangmin Choi

2023-01-04 08:51

developer  

screen_flash.mp4 (9,629,475 bytes)   
screen_flash.txt (570,248 bytes)
zemexplore.apk (202,665,384 bytes)
running_guide.mov (95,460,305 bytes)   

(ALTech) Sangmin Choi

2023-01-04 08:53

developer   ~0011639

Hello, Jacky,

Could you please assign an engineer for this issue?
And, please also check the target date(2023-01-11 09:00).

Thank you.

(SW) Jim Chen

2023-01-05 15:49

developer   ~0011677

Hi Sangmin,

I think screen_flash.txt didn't capture the information we want.
from the video, character move (left right down left) --> flash twice
but the move pattern is not found in screen_flash.txt
do you have more paired video and log?

I can't reproduce it yet, do you know the FW version that SKB tester use?
and could you confirm again that this issue is not related to TV? ( personally I feel it's more like a HDMI compatibility issue)

(ALTech) Sangmin Choi

2023-01-09 09:02

developer   ~0011711

Hi, Jim,

SKB testers told me that when the issue was reproduced, following log message was printed.

W/HWComposer: Ignoring duplicate VSYNC event from HWC for display 0 (t=341870009280)

Could you please analyze this message?

Thank you.
Sangmin Choi.

(ALTech) Sangmin Choi

2023-01-09 14:48

developer   ~0011720

Hi, Jim,

And, I'm sorry I attached the wrong log file before.
I attached the new log which is matched as screen_flash.mp4.

I think followings are the move pattern for screen_flash.mp4.

// 19 : ↑
12-15 17:36:51.594 1198 - I BTV_IMEService ime:onKeyDown start keyCode = 19, packageName: com.skb.zemexplore
12-15 17:36:51.645 1198 - I BTV_IMEService ime:onKeyDown start keyCode = 19, packageName: com.skb.zemexplore
12-15 17:36:51.697 1198 - I BTV_IMEService ime:onKeyDown start keyCode = 19, packageName: com.skb.zemexplore
12-15 17:36:51.747 1198 - I BTV_IMEService ime:onKeyDown start keyCode = 19, packageName: com.skb.zemexplore
12-15 17:36:51.797 1198 - I BTV_IMEService ime:onKeyDown start keyCode = 19, packageName: com.skb.zemexplore
12-15 17:36:51.848 1198 - I BTV_IMEService ime:onKeyDown start keyCode = 19, packageName: com.skb.zemexplore
12-15 17:36:51.900 1198 - I BTV_IMEService ime:onKeyDown start keyCode = 19, packageName: com.skb.zemexplore
12-15 17:36:51.949 1198 - I BTV_IMEService ime:onKeyDown start keyCode = 19, packageName: com.skb.zemexplore
12-15 17:36:51.999 1198 - I BTV_IMEService ime:onKeyDown start keyCode = 19, packageName: com.skb.zemexplore
12-15 17:36:52.050 1198 - I BTV_IMEService ime:onKeyDown start keyCode = 19, packageName: com.skb.zemexplore
12-15 17:36:52.102 1198 - I BTV_IMEService ime:onKeyDown start keyCode = 19, packageName: com.skb.zemexplore

// 20 : ↓
12-15 17:36:52.384 1198 - I BTV_IMEService ime:onKeyDown start keyCode = 20, packageName: com.skb.zemexplore
12-15 17:36:52.887 1198 - I BTV_IMEService ime:onKeyDown start keyCode = 20, packageName: com.skb.zemexplore
12-15 17:36:52.934 1198 - I BTV_IMEService ime:onKeyDown start keyCode = 20, packageName: com.skb.zemexplore
12-15 17:36:52.989 1198 - I BTV_IMEService ime:onKeyDown start keyCode = 20, packageName: com.skb.zemexplore
12-15 17:36:53.036 1198 - I BTV_IMEService ime:onKeyDown start keyCode = 20, packageName: com.skb.zemexplore
12-15 17:36:53.088 1198 - I BTV_IMEService ime:onKeyDown start keyCode = 20, packageName: com.skb.zemexplore
12-15 17:36:53.139 1198 - I BTV_IMEService ime:onKeyDown start keyCode = 20, packageName: com.skb.zemexplore
12-15 17:36:53.188 1198 - I BTV_IMEService ime:onKeyDown start keyCode = 20, packageName: com.skb.zemexplore
12-15 17:36:53.238 1198 - I BTV_IMEService ime:onKeyDown start keyCode = 20, packageName: com.skb.zemexplore
12-15 17:36:53.289 1198 - I BTV_IMEService ime:onKeyDown start keyCode = 20, packageName: com.skb.zemexplore
12-15 17:36:53.340 1198 - I BTV_IMEService ime:onKeyDown start keyCode = 20, packageName: com.skb.zemexplore
12-15 17:36:53.392 1198 - I BTV_IMEService ime:onKeyDown start keyCode = 20, packageName: com.skb.zemexplore
12-15 17:36:53.441 1198 - I BTV_IMEService ime:onKeyDown start keyCode = 20, packageName: com.skb.zemexplore
12-15 17:36:53.504 1198 - I BTV_IMEService ime:onKeyDown start keyCode = 20, packageName: com.skb.zemexplore
12-15 17:36:53.543 1198 - I BTV_IMEService ime:onKeyDown start keyCode = 20, packageName: com.skb.zemexplore
12-15 17:36:53.596 1198 - I BTV_IMEService ime:onKeyDown start keyCode = 20, packageName: com.skb.zemexplore
12-15 17:36:53.645 1198 - I BTV_IMEService ime:onKeyDown start keyCode = 20, packageName: com.skb.zemexplore
12-15 17:36:53.696 1198 - I BTV_IMEService ime:onKeyDown start keyCode = 20, packageName: com.skb.zemexplore
12-15 17:36:53.746 1198 - I BTV_IMEService ime:onKeyDown start keyCode = 20, packageName: com.skb.zemexplore
12-15 17:36:53.797 1198 - I BTV_IMEService ime:onKeyDown start keyCode = 20, packageName: com.skb.zemexplore
12-15 17:36:53.847 1198 - I BTV_IMEService ime:onKeyDown start keyCode = 20, packageName: com.skb.zemexplore
12-15 17:36:53.898 1198 - I BTV_IMEService ime:onKeyDown start keyCode = 20, packageName: com.skb.zemexplore
12-15 17:36:53.948 1198 - I BTV_IMEService ime:onKeyDown start keyCode = 20, packageName: com.skb.zemexplore
12-15 17:36:54.002 1198 - I BTV_IMEService ime:onKeyDown start keyCode = 20, packageName: com.skb.zemexplore
12-15 17:36:54.050 1198 - I BTV_IMEService ime:onKeyDown start keyCode = 20, packageName: com.skb.zemexplore
12-15 17:36:54.101 1198 - I BTV_IMEService ime:onKeyDown start keyCode = 20, packageName: com.skb.zemexplore
12-15 17:36:54.152 1198 - I BTV_IMEService ime:onKeyDown start keyCode = 20, packageName: com.skb.zemexplore
12-15 17:36:54.203 1198 - I BTV_IMEService ime:onKeyDown start keyCode = 20, packageName: com.skb.zemexplore
12-15 17:36:54.253 1198 - I BTV_IMEService ime:onKeyDown start keyCode = 20, packageName: com.skb.zemexplore
12-15 17:36:54.307 1198 - I BTV_IMEService ime:onKeyDown start keyCode = 20, packageName: com.skb.zemexplore
12-15 17:36:54.355 1198 - I BTV_IMEService ime:onKeyDown start keyCode = 20, packageName: com.skb.zemexplore
12-15 17:36:54.407 1198 - I BTV_IMEService ime:onKeyDown start keyCode = 20, packageName: com.skb.zemexplore
12-15 17:36:54.456 1198 - I BTV_IMEService ime:onKeyDown start keyCode = 20, packageName: com.skb.zemexplore
12-15 17:36:54.508 1198 - I BTV_IMEService ime:onKeyDown start keyCode = 20, packageName: com.skb.zemexplore
12-15 17:36:54.558 1198 - I BTV_IMEService ime:onKeyDown start keyCode = 20, packageName: com.skb.zemexplore
12-15 17:36:54.610 1198 - I BTV_IMEService ime:onKeyDown start keyCode = 20, packageName: com.skb.zemexplore
12-15 17:36:54.659 1198 - I BTV_IMEService ime:onKeyDown start keyCode = 20, packageName: com.skb.zemexplore
12-15 17:36:54.710 1198 - I BTV_IMEService ime:onKeyDown start keyCode = 20, packageName: com.skb.zemexplore
12-15 17:36:54.760 1198 - I BTV_IMEService ime:onKeyDown start keyCode = 20, packageName: com.skb.zemexplore
12-15 17:36:54.813 1198 - I BTV_IMEService ime:onKeyDown start keyCode = 20, packageName: com.skb.zemexplore
12-15 17:36:54.862 1198 - I BTV_IMEService ime:onKeyDown start keyCode = 20, packageName: com.skb.zemexplore
12-15 17:36:54.913 1198 - I BTV_IMEService ime:onKeyDown start keyCode = 20, packageName: com.skb.zemexplore
12-15 17:36:54.963 1198 - I BTV_IMEService ime:onKeyDown start keyCode = 20, packageName: com.skb.zemexplore
12-15 17:36:55.015 1198 - I BTV_IMEService ime:onKeyDown start keyCode = 20, packageName: com.skb.zemexplore
12-15 17:36:55.065 1198 - I BTV_IMEService ime:onKeyDown start keyCode = 20, packageName: com.skb.zemexplore
12-15 17:36:55.116 1198 - I BTV_IMEService ime:onKeyDown start keyCode = 20, packageName: com.skb.zemexplore
12-15 17:36:55.166 1198 - I BTV_IMEService ime:onKeyDown start keyCode = 20, packageName: com.skb.zemexplore

// 21 : ←
12-15 17:36:55.342 1198 - I BTV_IMEService ime:onKeyDown start keyCode = 21, packageName: com.skb.zemexplore
12-15 17:36:55.843 1198 - I BTV_IMEService ime:onKeyDown start keyCode = 21, packageName: com.skb.zemexplore
12-15 17:36:55.892 1198 - I BTV_IMEService ime:onKeyDown start keyCode = 21, packageName: com.skb.zemexplore
12-15 17:36:55.944 1198 - I BTV_IMEService ime:onKeyDown start keyCode = 21, packageName: com.skb.zemexplore
12-15 17:36:55.993 1198 - I BTV_IMEService ime:onKeyDown start keyCode = 21, packageName: com.skb.zemexplore
12-15 17:36:56.045 1198 - I BTV_IMEService ime:onKeyDown start keyCode = 21, packageName: com.skb.zemexplore
12-15 17:36:56.094 1198 - I BTV_IMEService ime:onKeyDown start keyCode = 21, packageName: com.skb.zemexplore
12-15 17:36:56.146 1198 - I BTV_IMEService ime:onKeyDown start keyCode = 21, packageName: com.skb.zemexplore
12-15 17:36:56.195 1198 - I BTV_IMEService ime:onKeyDown start keyCode = 21, packageName: com.skb.zemexplore

// 22 : →
12-15 17:36:56.503 1198 - I BTV_IMEService ime:onKeyDown start keyCode = 22, packageName: com.skb.zemexplore
12-15 17:36:57.002 1198 - I BTV_IMEService ime:onKeyDown start keyCode = 22, packageName: com.skb.zemexplore
12-15 17:36:57.051 1198 - I BTV_IMEService ime:onKeyDown start keyCode = 22, packageName: com.skb.zemexplore
12-15 17:36:57.103 1198 - I BTV_IMEService ime:onKeyDown start keyCode = 22, packageName: com.skb.zemexplore
12-15 17:36:57.152 1198 - I BTV_IMEService ime:onKeyDown start keyCode = 22, packageName: com.skb.zemexplore
12-15 17:36:57.204 1198 - I BTV_IMEService ime:onKeyDown start keyCode = 22, packageName: com.skb.zemexplore
12-15 17:36:57.256 1198 - I BTV_IMEService ime:onKeyDown start keyCode = 22, packageName: com.skb.zemexplore
12-15 17:36:57.307 1198 - I BTV_IMEService ime:onKeyDown start keyCode = 22, packageName: com.skb.zemexplore
12-15 17:36:57.356 1198 - I BTV_IMEService ime:onKeyDown start keyCode = 22, packageName: com.skb.zemexplore
12-15 17:36:57.407 1198 - I BTV_IMEService ime:onKeyDown start keyCode = 22, packageName: com.skb.zemexplore
12-15 17:36:57.456 1198 - I BTV_IMEService ime:onKeyDown start keyCode = 22, packageName: com.skb.zemexplore
12-15 17:36:57.507 1198 - I BTV_IMEService ime:onKeyDown start keyCode = 22, packageName: com.skb.zemexplore
12-15 17:36:57.557 1198 - I BTV_IMEService ime:onKeyDown start keyCode = 22, packageName: com.skb.zemexplore
12-15 17:36:57.609 1198 - I BTV_IMEService ime:onKeyDown start keyCode = 22, packageName: com.skb.zemexplore
12-15 17:36:57.661 1198 - I BTV_IMEService ime:onKeyDown start keyCode = 22, packageName: com.skb.zemexplore
12-15 17:36:57.712 1198 - I BTV_IMEService ime:onKeyDown start keyCode = 22, packageName: com.skb.zemexplore
12-15 17:36:57.762 1198 - I BTV_IMEService ime:onKeyDown start keyCode = 22, packageName: com.skb.zemexplore
12-15 17:36:57.812 1198 - I BTV_IMEService ime:onKeyDown start keyCode = 22, packageName: com.skb.zemexplore
12-15 17:36:57.863 1198 - I BTV_IMEService ime:onKeyDown start keyCode = 22, packageName: com.skb.zemexplore
12-15 17:36:57.917 1198 - I BTV_IMEService ime:onKeyDown start keyCode = 22, packageName: com.skb.zemexplore
12-15 17:36:57.965 1198 - I BTV_IMEService ime:onKeyDown start keyCode = 22, packageName: com.skb.zemexplore
12-15 17:36:58.016 1198 - I BTV_IMEService ime:onKeyDown start keyCode = 22, packageName: com.skb.zemexplore
12-15 17:36:58.065 1198 - I BTV_IMEService ime:onKeyDown start keyCode = 22, packageName: com.skb.zemexplore
12-15 17:36:58.116 1198 - I BTV_IMEService ime:onKeyDown start keyCode = 22, packageName: com.skb.zemexplore
12-15 17:36:58.166 1198 - I BTV_IMEService ime:onKeyDown start keyCode = 22, packageName: com.skb.zemexplore
12-15 17:36:58.218 1198 - I BTV_IMEService ime:onKeyDown start keyCode = 22, packageName: com.skb.zemexplore
12-15 17:36:58.271 1198 - I BTV_IMEService ime:onKeyDown start keyCode = 22, packageName: com.skb.zemexplore
12-15 17:36:58.319 1198 - I BTV_IMEService ime:onKeyDown start keyCode = 22, packageName: com.skb.zemexplore
12-15 17:36:58.369 1198 - I BTV_IMEService ime:onKeyDown start keyCode = 22, packageName: com.skb.zemexplore
12-15 17:36:58.420 1198 - I BTV_IMEService ime:onKeyDown start keyCode = 22, packageName: com.skb.zemexplore
12-15 17:36:58.473 1198 - I BTV_IMEService ime:onKeyDown start keyCode = 22, packageName: com.skb.zemexplore
12-15 17:36:58.523 1198 - I BTV_IMEService ime:onKeyDown start keyCode = 22, packageName: com.skb.zemexplore
12-15 17:36:58.578 1198 - I BTV_IMEService ime:onKeyDown start keyCode = 22, packageName: com.skb.zemexplore

// 20 : ↓
12-15 17:36:58.795 1198 - I BTV_IMEService ime:onKeyDown start keyCode = 20, packageName: com.skb.zemexplore
12-15 17:36:59.296 1198 - I BTV_IMEService ime:onKeyDown start keyCode = 20, packageName: com.skb.zemexplore
12-15 17:36:59.345 1198 - I BTV_IMEService ime:onKeyDown start keyCode = 20, packageName: com.skb.zemexplore
12-15 17:36:59.397 1198 - I BTV_IMEService ime:onKeyDown start keyCode = 20, packageName: com.skb.zemexplore
12-15 17:36:59.447 1198 - I BTV_IMEService ime:onKeyDown start keyCode = 20, packageName: com.skb.zemexplore
12-15 17:36:59.501 1198 - I BTV_IMEService ime:onKeyDown start keyCode = 20, packageName: com.skb.zemexplore
12-15 17:36:59.548 1198 - I BTV_IMEService ime:onKeyDown start keyCode = 20, packageName: com.skb.zemexplore
12-15 17:36:59.600 1198 - I BTV_IMEService ime:onKeyDown start keyCode = 20, packageName: com.skb.zemexplore
12-15 17:36:59.650 1198 - I BTV_IMEService ime:onKeyDown start keyCode = 20, packageName: com.skb.zemexplore
12-15 17:36:59.701 1198 - I BTV_IMEService ime:onKeyDown start keyCode = 20, packageName: com.skb.zemexplore
12-15 17:36:59.752 1198 - I BTV_IMEService ime:onKeyDown start keyCode = 20, packageName: com.skb.zemexplore
12-15 17:36:59.803 1198 - I BTV_IMEService ime:onKeyDown start keyCode = 20, packageName: com.skb.zemexplore
12-15 17:36:59.853 1198 - I BTV_IMEService ime:onKeyDown start keyCode = 20, packageName: com.skb.zemexplore
12-15 17:36:59.904 1198 - I BTV_IMEService ime:onKeyDown start keyCode = 20, packageName: com.skb.zemexplore
12-15 17:36:59.954 1198 - I BTV_IMEService ime:onKeyDown start keyCode = 20, packageName: com.skb.zemexplore
12-15 17:37:00.012 1198 - I BTV_IMEService ime:onKeyDown start keyCode = 20, packageName: com.skb.zemexplore
12-15 17:37:00.057 1198 - I BTV_IMEService ime:onKeyDown start keyCode = 20, packageName: com.skb.zemexplore
12-15 17:37:00.111 1198 - I BTV_IMEService ime:onKeyDown start keyCode = 20, packageName: com.skb.zemexplore
12-15 17:37:00.157 1198 - I BTV_IMEService ime:onKeyDown start keyCode = 20, packageName: com.skb.zemexplore
12-15 17:37:00.208 1198 - I BTV_IMEService ime:onKeyDown start keyCode = 20, packageName: com.skb.zemexplore
12-15 17:37:00.258 1198 - I BTV_IMEService ime:onKeyDown start keyCode = 20, packageName: com.skb.zemexplore
12-15 17:37:00.308 1198 - I BTV_IMEService ime:onKeyDown start keyCode = 20, packageName: com.skb.zemexplore
12-15 17:37:00.359 1198 - I BTV_IMEService ime:onKeyDown start keyCode = 20, packageName: com.skb.zemexplore
12-15 17:37:00.410 1198 - I BTV_IMEService ime:onKeyDown start keyCode = 20, packageName: com.skb.zemexplore
12-15 17:37:00.461 1198 - I BTV_IMEService ime:onKeyDown start keyCode = 20, packageName: com.skb.zemexplore
12-15 17:37:00.512 1198 - I BTV_IMEService ime:onKeyDown start keyCode = 20, packageName: com.skb.zemexplore
12-15 17:37:00.563 1198 - I BTV_IMEService ime:onKeyDown start keyCode = 20, packageName: com.skb.zemexplore

// 21 : ←
12-15 17:37:00.786 1198 - I BTV_IMEService ime:onKeyDown start keyCode = 21, packageName: com.skb.zemexplore
12-15 17:37:01.289 1198 - I BTV_IMEService ime:onKeyDown start keyCode = 21, packageName: com.skb.zemexplore
12-15 17:37:01.339 1198 - I BTV_IMEService ime:onKeyDown start keyCode = 21, packageName: com.skb.zemexplore
12-15 17:37:01.389 1198 - I BTV_IMEService ime:onKeyDown start keyCode = 21, packageName: com.skb.zemexplore
12-15 17:37:01.439 1198 - I BTV_IMEService ime:onKeyDown start keyCode = 21, packageName: com.skb.zemexplore
12-15 17:37:01.491 1198 - I BTV_IMEService ime:onKeyDown start keyCode = 21, packageName: com.skb.zemexplore
12-15 17:37:01.540 1198 - I BTV_IMEService ime:onKeyDown start keyCode = 21, packageName: com.skb.zemexplore
12-15 17:37:01.592 1198 - I BTV_IMEService ime:onKeyDown start keyCode = 21, packageName: com.skb.zemexplore
12-15 17:37:01.645 1198 - I BTV_IMEService ime:onKeyDown start keyCode = 21, packageName: com.skb.zemexplore
12-15 17:37:01.693 1198 - I BTV_IMEService ime:onKeyDown start keyCode = 21, packageName: com.skb.zemexplore
12-15 17:37:01.744 1198 - I BTV_IMEService ime:onKeyDown start keyCode = 21, packageName: com.skb.zemexplore
12-15 17:37:01.796 1198 - I BTV_IMEService ime:onKeyDown start keyCode = 21, packageName: com.skb.zemexplore
12-15 17:37:01.844 1198 - I BTV_IMEService ime:onKeyDown start keyCode = 21, packageName: com.skb.zemexplore
12-15 17:37:01.895 1198 - I BTV_IMEService ime:onKeyDown start keyCode = 21, packageName: com.skb.zemexplore
12-15 17:37:01.944 1198 - I BTV_IMEService ime:onKeyDown start keyCode = 21, packageName: com.skb.zemexplore
12-15 17:37:01.997 1198 - I BTV_IMEService ime:onKeyDown start keyCode = 21, packageName: com.skb.zemexplore
screen_flash_20230109.log (18,257,082 bytes)

(ALTech) Sangmin Choi

2023-01-09 15:06

developer   ~0011721

Hi, Jim,

I can see the log messages related with HDCP authentication.

12-15 17:10:57.314 395 - F AMP_TA VPP1@HDMI@[BE_HDCP2X_HdcpTxCheckRxStatus():464]:REAUTH: HDCP Reauth bit set
12-15 17:10:57.348 395 - F AMP_TA VPP1@HDMI@[BE_HDCP2X_HdcpTxCheckRxStatus():464]:REAUTH: HDCP Reauth bit set
12-15 17:37:01.477 395 - F AMP_TA VPP1@HDMI@[BE_HDCP2X_HdcpTxCheckRxStatus():464]:REAUTH: HDCP Reauth bit set
12-15 17:37:01.511 395 - F AMP_TA VPP1@HDMI@[BE_HDCP2X_HdcpTxCheckRxStatus():464]:REAUTH: HDCP Reauth bit set
12-15 17:37:03.804 395 - F AMP_TA VPP1@HDMI@[BE_HDCP2X_HdcpTxCheckRxStatus():464]:REAUTH: HDCP Reauth bit set

I think this is the root cause of screen flashing.
I will request to SKB test again with other TV or HDMI cable.

Thank you for kind help.
Sangmin Choi.

(SW) Jim Chen

2023-01-09 17:25

developer   ~0011725

Hi Sangmin,

Thanks for finding the root cause.
Here's some test about VSYNC message, just for reference.

The message is from frameworks/native/services/surfaceflinger/DisplayHardware/HWComposer.cpp
And there's a security patch about surfaceflinger service.
So I tried the nightly build D609 and D610
there's a lot of VSYNC message with D609 but very few in D610 when in the game.
but no screen flashing with both FW when the message show.

173 bool HWComposer::onVsync(hwc2_display_t hwcDisplayId, int64_t timestamp) {
......
191 // There have been reports of HWCs that signal several vsync events
192 // with the same timestamp when turning the display off and on. This
193 // is a bug in the HWC implementation, but filter the extra events
194 // out here so they don't cause havoc downstream.
195 if (timestamp == displayData.lastHwVsync) {
196 ALOGW("Ignoring duplicate VSYNC event from HWC for display %s (t=%" PRId64 ")",
197 to_string(*displayId).c_str(), timestamp);
198 return false;
.....

Author: Ady Abraham <adyabr@google.com>
Date: Mon Jun 6 15:16:06 2022 -0700
<Security Patch 2022.08> RESTRICT AUTOMERGE SurfaceFlinger: fix a potential race condition in stealReceiveChannel
Add a mutex to prevent a potential race condition.

(ALTech) Sangmin Choi

2023-04-11 15:23

developer   ~0012808

This issue occurred due to the use of a faulty HDMI cable.

Issue History

Date Modified Username Field Change
2023-01-04 08:51 (ALTech) Sangmin Choi New Issue
2023-01-04 08:51 (ALTech) Sangmin Choi Status new => assigned
2023-01-04 08:51 (ALTech) Sangmin Choi Assigned To => (SW) Jacky Chiang
2023-01-04 08:51 (ALTech) Sangmin Choi File Added: screen_flash.mp4
2023-01-04 08:51 (ALTech) Sangmin Choi File Added: screen_flash.txt
2023-01-04 08:51 (ALTech) Sangmin Choi File Added: zemexplore.apk
2023-01-04 08:51 (ALTech) Sangmin Choi File Added: running_guide.mov
2023-01-04 08:53 (ALTech) Sangmin Choi Note Added: 0011639
2023-01-04 11:05 (SW) Jacky Chiang Assigned To (SW) Jacky Chiang => (SW) Jim Chen
2023-01-05 15:49 (SW) Jim Chen Note Added: 0011677
2023-01-09 09:02 (ALTech) Sangmin Choi Note Added: 0011711
2023-01-09 14:48 (ALTech) Sangmin Choi Note Added: 0011720
2023-01-09 14:48 (ALTech) Sangmin Choi File Added: screen_flash_20230109.log
2023-01-09 15:06 (ALTech) Sangmin Choi Note Added: 0011721
2023-01-09 15:32 (ALTech) Sangmin Choi Assigned To (SW) Jim Chen => (ALTech) Sangmin Choi
2023-01-09 17:25 (SW) Jim Chen Note Added: 0011725
2023-04-11 15:23 (ALTech) Sangmin Choi Note Added: 0012808
2023-04-11 15:23 (ALTech) Sangmin Choi Status assigned => closed
2023-04-11 15:23 (ALTech) Sangmin Choi Resolution open => fixed