pulse trains on i2c2 sda

hi all,

i’m running my beagleboard with kernel 3.2.16-rt27-omap and am having issues communicating over I2C 2. looking on an oscilloscope i’m seeing some odd pulse trains on SDA, they look exactly like clock signals but they’re running at about 6-8x the i2C clock speed (my oscilloscope is rubbish so it’s hard to say for sure)…

these signals seem to be messing up my I2C communications. any idea what’s going on here? is this a known problem with this kernel?

thanks in advance
Damian Stewart