no screen refresh

[Altera_Forum]

I'm using the newest version of uClinux and the altera framebuffer driver. 

I'm having the problem that my screen isn't refreshing all the time. if i want it to refresh i have to push a button on the usb keyboard than a refresh is coming. Is there any know problem like this?

[Altera_Forum]

Please try nxclock. Please also try pulling the updates, clean and rebuild. 

 cd uClinux-dist make user/microwin_clean make  - Hippo

[Altera_Forum]

the clock out of fluid/fltk is doing a refresh :) 

 will try the update after finishing the project i'm working on right now ;) thanks for the help

[Altera_Forum]

i got another problem using fltk. 

fltk seems to not redraw the screen correctly. there a lots of pixels that change the colour and don't get back to normal. I tried fixing that by redrawing the regions but that doesn't help. at what point is fltk writing to the framebuffer?   i tested the ram i'm using for the framebuffer and there were no errors so it have to be somewhere in fltk or the framebuffer, but i think its the fltk. i wrote a simple programm that adresses the framebuffer ram directly and the colour is changing without problem or staying the same if i want to.

[Altera_Forum]

As odd as it may sound, I once saw a similar problem on a project and it only happened when a specific version of the proramming (pof) file was in use. If you were lucky, you could see a few pixels "blinking" on the screen -- a really cool side-effect! 

 After recompiling the project in Quartus with all settings targeting "speed" rather than "area", the problem vanished. In this case, it was purely a hardware problem.  Why do you think this is related to FLTK? When you compile a plain nano-X application, don't you have the same problems?  Cheers,  Ricardo.

[Altera_Forum]

yes just with fltk applications. if i just run the nxclock or the nxterm there is no problem, but if i run a fltk application the pixel problems appear.