diff --git a/README.md b/README.md index 3f03cdd..ad892fc 100644 --- a/README.md +++ b/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) diff --git a/en/trouble-majestic.md b/en/trouble-majestic.md index bcb85ab..cf4cdbb 100644 --- a/en/trouble-majestic.md +++ b/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,