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Firmware/Kernel issue on latest version ?

Posted: Mon Sep 23, 2019 10:57 am
by skcasb
Hi all,

we have notice an issue on hdmi after latest update of firmware/kernel/bootloader version below:

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vcgencmd version
Aug 15 2019 12:06:42
Copyright (c) 2012 Broadcom
version 0e6daa5106dd4164474616408e0dc24f997ffcf3 (clean) (release)(start)

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uname -a
Linux 4.19.66-v7+ #1253 SMP Thu Aug 15 11:49:46 BST 2019 armv7l GNU/Linux
We need to use a custom hdmi config due to our LCD size as below

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hdmi_group=2
hdmi_mode=87
hdmi_cvt 800 480 60 3 0 0 0
and after this latest update the hdmi screen is totally gray. the tvservice command returns also an incorrect value:

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tvservice -s
state 0x6 [DVI DMT (87) RGB full 16:9], 800x480 @ 59.00Hz, progressive
it seems, after many tests, that the only way to solve the issue is to open the config.txt file using sudo nano config.txt and exit without any modification, so that the file access date is modified.

Is there someone who had the same problem (Raspberry Pi 3B+) ? How did you solve it ?

Thank you in advance

Re: Firmware/Kernel issue on latest version ?

Posted: Mon Sep 23, 2019 1:34 pm
by skcasb
I forgot something very important,

this problem occurs when the rootfs is on USB key and not on SD-CARD.

In the latest version of the bootloader there must be a problem starting the file system from USB.

Unfortunately I can't use the sd-card as the basis for the file system, this is causing me a lot of problems

I also enabled bootloader messages with

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sed -i -e "s/BOOT_UART=0/BOOT_UART=1/" bootcode.bin
but I don't see any error message

can someone help me?

Thank you

Re: Firmware/Kernel issue on latest version ?

Posted: Mon Sep 23, 2019 5:49 pm
by fbe
There is an issue (and workaround) known for Raspberry Pi 3B/3B+ with Raspbian Stretch when booting from USB.
https://www.raspberrypi.org/forums/view ... 8&t=245554

Re: Firmware/Kernel issue on latest version ?

Posted: Mon Sep 23, 2019 5:56 pm
by PeterO
fbe wrote:
Mon Sep 23, 2019 5:49 pm
There is an issue (and workaround) known for Raspberry Pi 3B/3B+ with Raspbian Stretch when booting from USB.
https://www.raspberrypi.org/forums/view ... 8&t=245554
Can you point to the exact post in that thread where the fix is described ?

PeterO

Re: Firmware/Kernel issue on latest version ?

Posted: Mon Sep 23, 2019 6:14 pm
by fbe
https://www.raspberrypi.org/forums/view ... 4#p1512255
But actually I would recommend to start at the beginning, just to make sure that it's the right issue for the solution.

Re: Firmware/Kernel issue on latest version ?

Posted: Tue Sep 24, 2019 3:51 pm
by skcasb
The workaround suggested by you solved the issue.

I hope for a fix asap.

Thank you.