After upgrading to Jessie I had a lot of strange issues, which I've mostly resolved, but one thing I still can't get to the bottom of is, just after boot, the console display clears itself of all the boot log messages and then displays the login prompt at the top of the screen. After this screen-clear the Raspberry Pi logo is also gone.
I'm pretty sure this didn't happen before the upgrade.
If it's any help:
# pg /boot/cmdline.txt dwc_otg.lpm_enable=0 console=ttyAMA0,115200 console=tty1 root=/dev/mmcblk0p6 rootfstype=ext4 elevator=deadline rootwait consoleblank=0
So, how can I prevent (a) the console screen clearing, and (b) losing the Raspberry logo?