[vdr] osdteletext and problem with OSD

Udo Richter udo_richter at gmx.de
Fri Aug 12 14:44:24 CEST 2005

Marcel Wiesweg wrote:
> I received a bug report for osdteletext which describes a way to crash the FF 
> cards' OSD, and I am able to reproduce this. (Open teletext on a channel with 
> colorful teletext such as RTL, press repeatedly, fast and in random order 
> Yellow Key for half page and Green Key for zoom.)

The green zoom key just redraws the osd, no magic in there. The yellow
half page key switches (on FF-DVB 2mb) from 2bpp to 4bpp display. The
4bpp display maximizes its own size based on free osd memory, minus a
few lines for backup.

> Then the OSD seems to hang a short time, then disappears, after a while some 
> garbage appears. I tested with the in-kernel drivers from 2.6.11 and 2.6.12.
> Neither VDR nor the kernel driver seem to crash, but the OSD will not work 
> again. 

Tried here, no problems. I can easily fill up the keyboard buffer with
green/yellow key presses, no crashes or strange things, and as soon as
all key presses are processed, everything is back normal.

Kernel 2.4, driver 1.0.x CVS from january, firmware 261d.



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