Since there were different messages on various behaviour, let me summarize what I see at the moment.
My kernel commandline is this:
Kernel command line: console=ttyO2,115200n8 earlycon=ttyO2,115200n8 earlyprintk=1 root=/dev/mmcblk0p2 rootwait rw
As the board boots up, I see the following messages:
[ 3.200225] omapdss DPI: Could not find exact pixel clock. Requested 23500 kHz, got 23630 kHz [ 3.211303] omap_vout omap_vout: Buffer Size = 3686400 [ 3.217834] omap_vout omap_vout: : registered and initialized video device 0 [ 3.225311] omap_vout omap_vout: Buffer Size = 3686400 [ 3.231781] omap_vout omap_vout: : registered and initialized video device 1 [ 3.245117] dmm dmm: initialized all PAT entries [ 3.385406] [drm] Enabling DMM ywrap scrolling [ 3.440582] omapdss DISPC error: SYNC_LOST on channel tv, restarting the output with video overlays disabled [ 3.465240] Console: switching to colour frame buffer device 240x67 [ 3.542144] fb0: omapdrm frame buffer device [ 3.546722] drm: registered panic notifier [ 3.551177] [drm] Supports vblank timestamp caching Rev 1 (10.10.2010). [ 3.558319] [drm] No driver support for vblank timestamp query. [ 3.564697] [drm] Initialized omapdrm 1.0.0 20110917 on minor 0
And then the following line keeps coming atleast 10 times/second and completely filling the terminal:
omapdss DISPC error: SYNC_LOST on channel tv, restarting the output with video overlays disabled
Thanks Ramakrishnan