Dear Marek Vasut, > Dear Fabio Estevam, > > > Hi, > > > > I am running 3.8.2 kernel on a mx28evk and when I start X11 I get a > > "shifted" framebuffer. > > > > The framebuffer works well if X11 is not called. > > > > There is no issue with X11 when running with Freescale 2.6.35 kernel. > > > > Looking at drivers/video/mxsfb.c there is the following comment: > > /* > > > > * It seems, you can't re-program the controller if it is still running. > > * This may lead into shifted pictures (FIFO issue?). > > * So, first stop the controller and drain its FIFOs > > */ > > > > So, it looks like that I am still facing this issue when X11 starts. > > > > If anyone has any suggestions, please let me know. > > This is not it, I almost hunted the bug down. Hang on. > > Basically check mxsfb_set_par() and observe fb_info->var.sync . It's set to > "something" during regular framebuffer operation and it's set to "something > else" during Xorg operation. And that's what causes it to get broken. I > forced fb_info->var.sync to the "something" value by hardcoding it in > kernel just now for a quick test and X works for me. Uh, being in hacking-mode and replying to email doesn't work well together :-) In my case, fb_info->var.sync is set to FB_SYNC_DATA_ENABLE_HIGH_ACT during regular operation (framebuffer console), but if X11 starts, this fb_info- >var.sync is forced to value 0 which causes the malfunction. Now back into hacking-mode ;-) Best regards, Marek Vasut -- To unsubscribe from this list: send the line "unsubscribe linux-fbdev" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
