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[Bug 915456] Re: XBMC UI random framerate drops from 30 FPS to 15FPS

 

Can you update to the latest driver available (1.7.10.0.1.8-1linaro1),
and then disable the drm polling to see if works better?

root@linaro-ubuntu-desktop:~# echo 0 >
/sys/module/drm_kms_helper/parameters/poll

After disabling polling SGX is quite stable with my system, and it also
behaves better when playing a video (without the sensation of loosing
frames from time to time).

As robclark was saying at the IRC, this is probably because the way DVI
is detected is by polling the i2c bus checking for a valid EDID, and for
some reason the system will wait a timeout at the i2c driver, causing
the frame drop.


** Also affects: linaro-ubuntu
   Importance: Undecided
       Status: New

** Changed in: ubuntu-omap4-extras-multimedia
       Status: New => Confirmed

** Changed in: linaro-ubuntu
       Status: New => Confirmed

** Changed in: linaro-ubuntu
     Assignee: (unassigned) => Ricardo Salveti (rsalveti)

** Changed in: linaro-ubuntu
   Importance: Undecided => Medium

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https://bugs.launchpad.net/bugs/915456

Title:
  XBMC UI random framerate drops from 30 FPS to 15FPS

Status in Linaro Ubuntu Evaluation Builds:
  Confirmed
Status in OMAP4 Ubuntu Multimedia addons:
  Confirmed

Bug description:
  Just installed XBMC following instrucctions from rsalveti
  (http://rsalveti.wordpress.com/2012/01/06/hw-video-decode-and-xbmc-
  ubuntu-linaro/) and i'm experiencing random FPS drops in both the UI
  and video decode.

  You can get a better idea in this video:
  http://www.youtube.com/watch?v=4DcdATFduII&context=C3f58d6bADOEgsToPDskIqTI_an28joYlQPhPC6vvG

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References