Framebuffer "hangs" at startup
From: Bill Gatliff <hidden>
Date: 2006-10-18 02:43:01
Guys: Bear with me, this one is a bit tricky to describe... :) I'm testing a 2.6.12 kernel and a 2.6.18.1 kernel, and a few in between, and they all do it. All on ARM targets: PXA255 with onboard LCD framebuffer, and AT91RM9200 with an S1D13xxx framebuffer. Duplicated with Qt 4.x and SDL 1.2-debian. The first time I start up a framebuffer-based application, say Qt or Antigrain/SDL, things appear to go fine. But if I abort said program with a CTRL-C and restart it, then the application appears to start up fine but there's no screen output. I don't see any output until I do a CTRL-Z and then restore the program to the foreground with "fg". Then the screen clears and things start drawing as usual. The screen also draws if I do a CTRL-C instead of -Z, but then the program aborts as you would expect. If I'm running the program under strace then the screen never recovers whether I do a CTRL-Z or not. I see the code hanging in an ioctl(KGDKBENT) on /dev/tty8. Honestly, I'm totally stumped. Anyone have any suggestions? b.g. -- Bill Gatliff bgat@billgatliff.com ------------------------------------------------------------------------- Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642