The very end user performance test case : ADSL TV playback

Bug #374800 reported by Romuald on 2009-05-11

This bug report was converted into a question: question #119165: The very end user performance test case : ADSL TV playback.

8
This bug affects 1 person
Affects Status Importance Assigned to Milestone
Ubuntu
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Bug Description

Dear all,
I submit this bug report to propose a very end user performances test case : watching TV over an ADSL connection.

The test configuration:
- Macbook Pro 2G (Core 2 Duo, wireless Atheros AR5008, ATI X1600)
   - OSX Leopard
   - Jaunty 64 bits (out of the box configuration, ATI open source driver, compiz activated)
   - VLC in both case
- Dell Latitude D620 (Core Duo, Intel graphics) with Jaunty 32 bits (compiz activated)

The test case: Watch TV with VLC over the ADSL connection:
- in SD (720*576)
- in HD (1280*1080)

The results :
- Mac - OSX Leopard:
   - SD: image and sound fluent, no drops, perfect
   - HD: image and sound fluent, no drops, perfect
- Mac - Jaunty:
   - SD: not fluent, lot of drops, not watchable
   - HD: not fluent, lot of drops, sound not stable, not watchable
- Dell - Jaunty:
   - SD: image and sound fluent, no drops, perfect
   - HD: not fluent, some drops, sound stable, not really watchablebut much better than the Mac.

I know this is a very general test case, but I submit it to give a direction for searching improvements to make Ubuntu more efficient, and as performant as OSX. So, I can make some additionnal and more accurate and targeted tests to try to isolate which part of Ubuntu are responsible for the bad performances.

Thanks for your participation.

Romuald (romu70) wrote :

More information : the Dell has some freezes with the HD, but the situation is pretty much better than on the Mac.

Romuald (romu70) wrote :

Additionnal information: watching SDTV on the Mac with Ubuntu was possible with Hardy (madwifi and the fglrx driver), HDTV was not possible at that time, but SDTV was perfectly watchable.

As this is no more possible since Intrepid, we can state there is a big performance regression between Hardy and Intrepid.

Fabio Marconi (fabiomarconi) wrote :

Thank you for taking the time to make Ubuntu better.
I convert this into a question because this is not a bug or malfunction.
:)Fabio

Fabio Marconi (fabiomarconi) wrote :

Not a bug

Changed in ubuntu:
status: New → Invalid
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