[pwarren]

that's done the trick! Almost working, now I've got FBReader turning the page in ~4s, but flashing again after another ~1s.

Getting closer!

edit:
Hrm, nothing I'm doing seems to get rid of the second flash, here's the code I'm using:

extern "C" {
#include "xepdmgrclient.c"
};

sEpd *Epd;

static void doPaint(GtkWidget*, GdkEventExpose*, ZLGtkViewWidget *data) {
  // Turn on the busy LED
  erIpcStartClient(ER_BUSYD_CHANNEL, &erbusyChannel);
  // Turn off xepdmgr auto updates
  EpdRefreshAuto(Epd,0);
  //Refresh the Display after everything has painted      
  data->doPaint();
  display = gdk_x11_display_get_xdisplay(gdk_display_get_default());
  XSync(display, 1);
  dmDisplay(dmCmdPriorUrgent, dmQFull);
  // Turn xepdmgr auto updates back on 
  EpdCancel(Epd);
  EpdRefreshAuto(Epd,1);
  //Turn off the busy LED
  busySetBusy(erbusyChannel, ccBusyState_Off);
}

Adding another EpdCancle(Epd); after the EpdRefreshAuto() call doesn't seem to help