Hi, I'm working with a board derived from the Freescale/LogicPD mcf5329 evaluation board, and using the microwindows-0.90 package which is included in ltib-cf_nommu-20081215 from Freescale's web site. The framebuffer (kernel is linux-2.6.26) is set up for a 320 wide by 240 high LCD. The penguin shows fine on power-up.
But, when I try to run some of the demo apps, I get mixed results at best. As a good example of exactly where I'm at, if I run /usr/nanox/launcher.sh, I get what appears to be a 3 x 3 matrix of icons, presumably for launching other demo apps; the icons included are (top row) Tetrix, Slider, Terminal; (middle row) Clock, Magnifier, Scribble, (bottom row) Roach, Tux, and NXEyes. This matrix has its lower left corner aligned with the lower left corner of the screen, and does not occupy the entire screen; the remainder (about the top 25% and the rightmost 10%) seems to be some patterned background. All this appears good - I say "appears" as I'm not really sure what to expect. However, there is a big problem - the bottom ~20% of the screen has a flicker that exhibits itself as random row-wide artifacts. What I mean is that it seems some rows really are not being drawn - for example, row 200 might be drawn, row 201 gets skipped, and row 202 gets drawn where 201 should be. I say this because it appears that the labels of the bottom three icons (i.e. Roach, Tux, and NXEyes jump up and down a row or two. The rest of the display is rock-solid. After playing with this a while, I've discovered something. After about 15 seconds, the launcher.sh demo goes into a random screensaver mode. Some screensavers look really good, such as a "searchlight" that illuminates a small circle that is moved over the display, the rest of which is black - simulating a flashlight searching in a darkened room. For this screensaver, every thing is sharp, and there is no flicker whatsoever. Other screensavers, such as one that looks like lighting flashes, exhibits the flicker over large portions of the display - not just the bottom portion. Other screensavers show either extreme, or behavior in between them. What seems to be going on is that the more dynamic the graphics, the more the flicker is exhibited. Put another way, the more static the display, the less flicker is noticed. I would expect that a totally static display might well show no flicker whatsoever. (Note: I don't know if the launcher.sh main screen is indeed fully static - it would appear to be, but perhaps something at the very bottom isn't). This would seem to be timing related or something, but I haven't been able to find anything amiss in the stock code. I did come across something regarding priority of the LCD controller on the internal crossbar switch, but it appears that it has already been elevated to the highest priority by the kernel. I'm completely stumped by this - anyone have any ideas on what might be amiss, or what to investigate? Thanks, -Bob --------------------------------------------------------------------- To unsubscribe, e-mail: nanogui-unsubscr...@linuxhacker.org For additional commands, e-mail: nanogui-h...@linuxhacker.org
