CPU:0, Error:cbb-noc@0x2300000,irq=15

SAVE2022_10_17_13-16-05.DAT (845.5 KB)

Hi When I using L4T 35.1, sometimes I got the error as attahced file and System cannot bootup, could you please have a look about this issue?
And how can I fix it?



Could you check if this is causes by monitor? Please remove HDMI monitor and test again.

If this is caused by HDMI, then we have a workaround patch to try here.

ok, because it happens occationally, if it occures again without HDMI monitor, I will let you know.

thanks for your reply.


Hi WayneWWW,

so far, I haven’t found any “Error:cbb-noc@0x2300000…” , In case it happend at customer side which is really bad if system cannot boot. Could you please share the workaround patch?


Here is the kernel patch for kernel driver.

diff --git a/drivers/video/tegra/dc/dc.c b/drivers/video/tegra/dc/dc.c
index 1cedba9..09e1a0d 100644
--- a/drivers/video/tegra/dc/dc.c
+++ b/drivers/video/tegra/dc/dc.c
@@ -6374,7 +6374,7 @@
 		pr_debug("dc->fb_mem not initialized\n");
 		return false;
-	return (dc->fb_mem->start != 0);
+	return false;
1 Like

Got it, thanks~!

Hi, Are there any side effects for the modify?

This is not tested on TX1/Nano, but on Xaiver NX devkit, this would cause a blanked screen after logo shows up.

@WayneWWW If apply such patch on NX, as your said for side affect, “a blanked screen after logo shows up”, that’s to say system will boot into desktop UI with blanked screen, or monitor will have no display and system is hung forever?

Will boot into UI.

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