Merge 575a0781de into ccd154cda7

README.md

@@ -58,7 +58,8 @@ OpenIPC Wiki
 ### Troubleshooting
 
 - [Network does not work](en/trouble-network.md)
-- [Majestic does not work, camera reboots](en/trouble-majestic.md)
+- [Majestic does not show images, no reboot](en/trouble-majestic.md#troubleshooting-majestic-does-not-show-any-images-no-reboot)
+- [Majestic does not work, camera reboots](en/trouble-majestic.md#troubleshooting-majestic-does-not-work-camera-reboots)
 - [Sigmastar unbrick instructions](en/sigmastar-unbrick.md)
 - [Ingenic T31 unbrick with SD card](en/ingenic-t31-unbrick-with-sd-card.md)
 

en/trouble-majestic.md

@@ -1,6 +1,28 @@
 # OpenIPC Wiki
 [Table of Content](../README.md)
 
+## Troubleshooting: Majestic does not show any images, no reboot
+
+Let's say that `top` shows that majestic is running, but no image is displayed.
+The preview tab shows only a test pattern and there is an error similar to the
+one below in dmesg.
+
+```
+...
+sc2336 chip found @ 0x30 (i2c0)
+sensor driver version H20210805a
+sc2336 stream on
+error: one buffer schedule only support nrvbs = 1, chan index:0, num_buffers:2
+...
+```
+
+The `nrvbs = 1` may be the problem. Set the `isp.blkCnt` majestic property
+to 1 with the Block Count control on the ISP tab of Majestic settings, then
+restart majestic.
+This issue has only been documented on T31L and T31N SOCs with SC2336 and
+JXF37 sensors; let us know if you see this on a different platform an if this
+setting change works for you.
+
 ## Troubleshooting: Majestic does not work, camera reboots
 
 To troubleshoot majestic you first need to get access to its logs, right to the moment as it crashes,