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   b-rad: mchehab, have you seen problems with qam256 dvb-c on si2168/si2157?
   mchehab: b-rad: no, but I remember that some new silicon drivers used to have troubles...
   <br> I guess it is si2168/si2157, but I may be wrong
   <br> there were patches supposed to address it
   <br> but I'm not sure if it is already 100%
   <br> it is/was a driver issue, it seems
   <br> you should ping the driver's author to be sure
   <br> (Olli)
   b-rad: we're having issues tuning qam256 dvb-c signals, so don't think it's fixed
   mchehab: TrSqr_ is his nick
   b-rad: using fairly recent tip
   <br> well actually not the tuning, its the ts streams that are fubar
   mchehab: (or maybe crope was the driver's author)
   <br> commit 548b1f94904ae1616f9338a772e89a9f2e705325
   <br> <u>Author</u>: Matthias Schwarzott &lt;zzam@gentoo.org&gt;
   <br> <u>Date</u>:   Sun Nov 5 09:25:04 2017 -0500
   <br> that's si2165
   <br> double-checked at the logs...
   <br> the author for si2168 was crope, but TrSqr_ added support for several initial devices using it and is doing several patches related to it...
   <br> so, either crope or TrSqr_ may help you
   <br> this driver was written using reverse engineering
   <br> so I won't doubt that it will fail on some cases
   b-rad: yes, source has feeling of being reversed with little documentation
   mchehab: yep
   b-rad: so this patch switches default from qam_auto to use prop cache
   <br> si2168 does appear to only support qam_auto, just doesn't work with 256. Will see about changing si2168 similarly