lkml.org 
[lkml]   [2014]   [Dec]   [6]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    Date
    SubjectRe: frequent lockups in 3.18rc4
    From
    Hi,

    I've been following this thread with some interrest because my mythtv
    based media centre suffered from sudden freezes. I thought I had tried
    everything to solve the problem (including exchanging hardware) until
    I caught the slashdot article discussing this bug. I was running on
    3.17.3 and and experienced daily freezes while watching DVB-C recorded
    H.264 (HD) video, both live and pre-recorded streams. Both using VAAPI
    GPU accelaration and CPU decoding. Ever since downgrading to 3.16.7 my
    system has been solid as a rock again.

    The load on this machine is marginal. Most playback is done using GPU
    and other than that, the main load is hammering at most 2 HD
    (1G/10mins) streams to SSD. When idle, the system crawls DVB channels
    for EPG info. Crashes happened mostly while watching TV and ~5 minutes
    after a background recording started or after a couple of hours
    watching live TV, but were very hard to trigger. When freezing the
    system was completely inaccessible, without any panic logging on (ssh
    remote connected) console. I have never been able to find any evidence
    in old logs after reboot. The freezes happened both with and without
    NMI watchdog enabled.

    Hardware is J1900 BayTrail (ValleyView) based ASRock miniITX board.
    The DVB-C card requires out-of-tree built ddbridge drivers
    (~endriss/media_build_expermintal) so the kernels (both stable and
    unstable) are tainted I guess?

    I'm a moderately experienced Linux user. I do build my own kernels,
    but am not very knowledgable about the inner workings you guys are
    discussing here. The system is a (family) production device so there
    is not a lot of room for testing, let alone bisecting. I do now have a
    spare J1900 lying around, so there is opportunity to build a dedicated
    test system if needed.

    Hope this may help in finding the right direction for this bug?

    Regards,
    Martin
    --
    If 'but' was any useful, it would be a logic operator


    \
     
     \ /
      Last update: 2014-12-06 18:01    [W:7.288 / U:0.056 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site