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903:SysPowState:
903:SysPowState:x81->x01
905:PWtime: 1
1448:HPD_1OutIn:x01,x01
1449:HPD_2OutIn:x01,x00
Mbox:x89,x85
1215:tmp,ver2,x01,x35
339:IT8566_FWVer1,2:x02,x35
344:8566
385:IT8566_FWVer1,2:x02,x35\
<EC 06> 1a 01 cc d1 01 cc]
Mbox:x16,x85
Mbox:x1A,x01
Mbox:x15,x7F
Mbox:x06,x7F
<EC 06> 2a 00 00 00 00 cc]
Mbox:x1D,x00
191:Persistent_Port1HPD:x00
198:DisplayEmuMode->new:x00,x00
221:Persistent_GetInfo,BRAM[0x12]:x00,x66_\
1448:HPD_1OutIn:x00,x00
1449:HPD_2OutIn:x01,x00_
1448:HPD_1OutIn:x01,x01
1449:HPD_2OutIn:x01,x00
<EC 03> 11 d3 d3] \
Mbox:x01,x00
Mbox:x18,x00 _\_
Mbox:x88,x00
1215:tmp,ver2,x01,x35\
720:hpd1 _LOW
1448:HPD_1OutIn:x00,x01
1449:HPD_2OutIn:x01,x00_
1448:HPD_1OutIn:x01,x01
1449:HPD_2OutIn:x00,x00
<EC 06> a2 a1 01 1a a2 cc]
<EC 06> 72 00 cc 72 01 cc] \
<EC 06> 72 20 ff 00 00 cc]
<EC 03> 72 30 cc] _\_\_\_\
<EC 03> 10 d3 d3]
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Hello @hpvzr
Thank you for your response.
In order to review this further, could you please provide us with the following details?
1- Just to make sure, how and where did you get/see the Serial debug output information from? Please provide details:
2- When you said "the serial port becomes unusable", what is the exact behavior?
Do you have a Serial Port adapter connected to the NUC's internal Serial Port Header? Is it having issues establishing a connection, recognizing devices, or is it having drop connections, etc? Please provide details:
3- Run the Intel® System Support Utility (Intel® SSU) to gather more details about the system:
- Download the Intel® SSU and save the application on your computer
- Open the application, check the "Everything" checkbox, and click "Scan" to see the system and device information. The Intel® SSU defaults to the "Summary View" on the output screen following the scan. Click the menu where it says "Summary" to change to "Detailed View".
- To save your scan, click Next and click Save.
- Once you have saved the file (.txt file), please attach it to your reply.
To upload and attach a file, use the "Drag and drop here or browse files to attach" option below the response textbox.
Best regards,
Andrew G.
Intel Customer Support Technician
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Hello @AndrewG_Intel
here are requested details:
1. I'm observing the debug output (from BIOS/firmware/EC and etc) from a serial connection to UART/RS232/serial/0x3f8 via putty/minicom/picocom. The serial port is connected via USB/TTL converter to another PC. It even stays when I shutdown Linux/Windows (which makes sense because EC/ME are still powered on) and also proof it is not an OS output.
2. This debug output is flooding serial and even doing impossible to enter/send anything to NUC. For example it's impossible to use the linux getty/console after the NUC firmware update (i.e. "console=ttyS0" as kernel boot parameter)
3. see attached info
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just would like to add my explanation:
It looks like the BIOS team accidentally uploaded the DEBUG build of UEFI firmware. It could be easily fixed by either re-uploading RELEASE build or producing a new version (just to make sure there is a RELEASE build)
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Hello hpvzr
Thank you for your response and for all the details.
Please allow us to review this further and we will be posting back in the thread as soon as more information is available.
Best regards,
Andrew G.
Intel Customer Support Technician
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Hello hpvzr
Thank you for your patience in this matter.
After reviewing this further, we would like to inform you that this issue will be fixed in the next BIOS release (target date is end of July but dates may shift). In the meantime, we will send you an email to the email address associated with your profile to provide you with some steps for testing purposes.
Best regards,
Andrew G.
Intel Customer Support Technician
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Hello hpvzr
We are checking this thread and we would like to know if you were able to review the email we sent you on June 6th. Please do not hesitate to contact us back if you have additional inquiries.
Best regards,
Andrew G.
Intel Customer Support Technician
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Hello hpvzr
We have not heard back from you so we will proceed to close this thread now. If you need any additional information, please submit a new question as this thread will no longer be monitored.
It has been a pleasure to assist you.
Best regards,
Andrew G.
Intel Customer Support Technician
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