Unity (2D) Makes Videos Lag

Asked by TJ Rosene

I have three test machines running up-to-date 11.10 Unity 2D (32 bit). All three have issues with video in that the video lags way behind the sound. The videos actually look like they are being played in slow-motion.

When these test machines were running 11.04, 10.10, and 10.04, watching video was not an issue and they could perform the task flawlessly.

These three test machines are running on-board generic Intel graphics, nothing special requiring any sort of special drivers (ATI, Nvidia, etc.).

I should also mention that it doesn't matter what video format (.avi, mpeg, Flash), nor what video player (Flash Player, Banshee, VLC, MPLayer), the sound and the video are always out of sync.

Is anyone else experiencing this problem? Is this a bug? If it is a bug, I'd like to "officially" report it.

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Ubuntu unity-2d Edit question
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actionparsnip (andrew-woodhead666) said :

Can you give the output of:

sudo lshw -C display; uname -a; lsb_release -a


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TJ Rosene (teejay17) said :

       description: VGA compatible controller
       product: Radeon Mobility M7 LW [Radeon Mobility 7500]
       vendor: ATI Technologies Inc
       physical id: 0
       bus info: pci@0000:01:00.0
       version: 00
       width: 32 bits
       clock: 66MHz
       capabilities: agp agp-2.0 pm vga_controller bus_master cap_list rom
       configuration: driver=radeon latency=66 mingnt=8
       resources: irq:11 memory:e0000000-e7ffffff ioport:3000(size=256) memory:c0100000-c010ffff memory:c0120000-c013ffff
Linux tj-ThinkPad-T41 3.0.0-11-generic #18-Ubuntu SMP Tue Sep 13 23:29:47 UTC 2011 i686 i686 i386 GNU/Linux
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu oneiric (development branch)
Release: 11.10
Codename: oneiric

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TJ Rosene (teejay17) said :

Strange that it says ATI. I've only known this machine to have Intel generic graphics on board.
Nonetheless, it's always been sufficient to play videos before (even when I used both Ubuntu & Kubuntu 11.04 on the machine).

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actionparsnip (andrew-woodhead666) said :

Log a bug. Oneiric is not ready and not stable. You are using the opensource 'radeon' driver. I am not sure the chip is supported by the proprietary driver now. You may find the combination of driver and xorg is causing the lag. You may need to use an xorg.conf file to specify better video display options to make it perform but you should definately report the bug

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TJ Rosene (teejay17) said :

Thanks for the feedback. I logged a bug here: https://bugs.launchpad.net/ubuntu/+source/unity-2d/+bug/852554

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