[Lcdproc] imonlcd patch and mythtv

[William Uther]

Hi all,

   I'm running a mythtv box on Ubuntu with an Antec Fusion case.  I've  
had to do a bit of patching to get it all going and I've just recently  
started trying to get all the patches (mostly not mine) committed and  
released so that they can make it into Ubuntu Karmic.  That's the  
context for the patch I sent to this mailing list a few days ago  
commenting out a return statement.

   I haven't actually been running lcdproc 0.5.3.  Rather I've been  
running 0.5.2 with the imonlcd drivers added.  (I'm also running the  
standard ubuntu mythtv 0.21-fixes.)  With that setup the patch I  
submitted works well.  When the backlight is switched off, the display  
turns off and everything is good.

   With the imminent release of lcdproc 0.5.3 I thought I should test  
CVS head.  As is known, it fails with mythtv 0.21-fixes.  So I patched  
my mythtv with this patch http://svn.mythtv.org/trac/changeset/20559  
which is the supposed fix.  With that patch, lcdproc head seemed to  
mostly work, except for one thing - now the lcd display was flashing  
with about a 5 second interval.

   This seems to describe exactly the behaviour that lead to the  
return statement being added in the imonlcd driver.

In summary:

Mythtv           lcdproc         imonlcd-patch      Result

0.21-unpatched   0.5.2+imonlcd   return removed     Works well -  
backlight dims appropriately
0.21-unpatched   head            either             known to fail
0.21-patched     head            return left in     lcd backlight  
never dims
0.21-patched     head            return removed     lcd flashes with  
about 5 second period

It seems that the flashing behaviour that the 'return' was added to  
fix could be a regression in the interaction of mythtv and lcdproc  
head.  Has anyone else, with a different lcd that allows backlight  
dimming, seen this interaction between mythtv and lcdproc?

Cheers,

Will       :-}