[mythtv-users] MythTV playback fails in Fedora 28 4.19.2 after multi-package update today

[jlistspam]

On 11/29/2018 9:26 AM, Greg Oliver wrote:
> On Thu, Nov 29, 2018 at 8:03 AM John Pilkington <johnpilk222 at gmail.com 
> <mailto:johnpilk222 at gmail.com>> wrote:
>
>     On 27/11/2018 17:44, Greg Oliver wrote:
>     > On Thu, Nov 22, 2018 at 3:12 PM Nigel Jewell
>     <nigel.jewell at grufty.co.uk <mailto:nigel.jewell at grufty.co.uk>
>     > <mailto:nigel.jewell at grufty.co.uk
>     <mailto:nigel.jewell at grufty.co.uk>>> wrote:
>     >
>     >     On 22/11/2018 20:29, John Pilkington wrote:
>     >      > I'm not sure that this is the best place to report, but
>     much of the
>     >      > system seems ok and mythfrontend locks up with 'Please
>     wait' on
>     >      > starting playback.   Recovery seems to need power-off and
>     reboot.
>     >      >
>     >      > KDE, nVidia GT 710 with 410.78, vdpau  HQ
>     >      >
>     >      > Reverted to 4.18.18 and it works again.
>     >
>     >
>     >     You are probably experiencing this:
>     > https://bugzilla.redhat.com/show_bug.cgi?id=1650224 ??
>     >
>     >
>     >     Nige.
>     >
>     >
>     > There are several tuner related bugs as well with 4.19+
>     >
>     > https://lkml.org/lkml/2018/11/20/1208
>     >
>     > is one of them.  Might be good for everyone to stay on 4.18
>     until they
>     > get backported.  LKML has quite a few of them today that I noticed
>     > during leisurely reading..
>     >
>     > -Greg
>
>     I had not seen problems like this while running 4.18.18, but
>     4.19.5 is
>     now in Fedora updates-testing and is working for me.
>
>     John
>
>
> Yeah - that example was related to the flexcop cards, but they made 
> under the hood changes to v4l2 that affected more cards, but not all.  
> What sucks is that the kernel has very strict rules regarding breaking 
> userspace, but apparently the multimedia (v4l2) subsections do not 
> adhere to that policy, so they just fix as they go.. Kind of 
> depressing actually.
>
>
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Thank you for bringing up this issue.  I had the same problem on one of 
my machines after upgrading three of them from Fedora 28 to 29.  I 
couldn't figure out what the issue was after removing and installing the 
nvidia drivers and myth itself.  Based on this info, I rebooted and 
selected the 4.18.16-200 kernel and the playback works now.

You saved me a lot of time as I was preparing to rebuild the whole 
machine this weekend.  It looks like the 4.19.5 kernel in Fedora has the 
patch.   Hopefully that will hit the main updates soon.

Thank you!

John

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