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#1 2008-06-03 14:29:54

finferflu
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From: Manchester, UK
Registered: 2007-06-21
Posts: 1,899
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Very choppy video performance with my Intel 945GM

Hi, I usually don't watch movies, but I've been trying to watch one lately (Big Buck Bunny) and it's very very choppy, both sounds and images.

Here is the relevant section from my xorg.conf:

Section "Device"
    Identifier  "Card0"
    Driver      "intel"
    VendorName  "All"
    BoardName   "All"
    Option      "AccelMethod" "exa" # with "xaa" it's the same
    Option        "DRI"      "true"
    Option      "XAANoOffscreenPixmaps" "true"
EndSection

Does anyone else experience this?
My Window Manager is wmii, and I'm not using any composite tool (like xcompmgr, for example).

Any help is appreciated.
Thank you smile


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#2 2008-06-03 14:43:36

moljac024
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From: Serbia
Registered: 2008-01-29
Posts: 2,676

Re: Very choppy video performance with my Intel 945GM

Try this:


Section "Device"
Option "XAANoOffscreenPixmaps" "true"
Option  "MigrationHeuristic" "greedy"  #this one is for use with the EXA AccelMethod only


Section "Extensions"
Option "RENDER"    "Enable"

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#3 2008-06-03 15:09:34

Gullible Jones
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Registered: 2004-12-29
Posts: 4,863

Re: Very choppy video performance with my Intel 945GM

RENDER is enabled by default.

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#4 2008-06-03 15:43:57

finferflu
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From: Manchester, UK
Registered: 2007-06-21
Posts: 1,899
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Re: Very choppy video performance with my Intel 945GM

Thanks for the suggestion, but that didn't change much...


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#5 2008-06-03 15:59:37

bangkok_manouel
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Registered: 2005-02-07
Posts: 1,556

Re: Very choppy video performance with my Intel 945GM

is direct rendering ok BTW ?

maybe worth a try:

Section "Device"
    Identifier  "Card0"
    Driver      "intel"
    VendorName  "All"
    BoardName   "All"
    Option      "AccelMethod" "EXA"
   Option         "MigrationHeuristic" "greedy"
EndSection

Last edited by bangkok_manouel (2008-06-03 16:21:07)

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#6 2008-06-03 16:39:31

finferflu
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From: Manchester, UK
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Posts: 1,899
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Re: Very choppy video performance with my Intel 945GM

> glxinfo | grep rendering 
direct rendering: Yes

However, what is the difference between your method and moljac024?

Thanks smile


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#7 2008-06-03 16:50:05

bangkok_manouel
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Re: Very choppy video performance with my Intel 945GM

finferflu wrote:

However, what is the difference between your method and moljac024?

Option "XAANoOffscreenPixmaps" "true"

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#8 2008-06-03 16:58:10

finferflu
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From: Manchester, UK
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Re: Very choppy video performance with my Intel 945GM

Ah, sorry it's me. I couldn't see the difference because I already have that entry.


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#9 2008-06-03 17:09:37

bangkok_manouel
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Posts: 1,556

Re: Very choppy video performance with my Intel 945GM

oh and which video output module do you use ? did you try using xv ?

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#10 2008-06-03 17:13:38

finferflu
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From: Manchester, UK
Registered: 2007-06-21
Posts: 1,899
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Re: Very choppy video performance with my Intel 945GM

Thanks, I'm using xv and nothing is choppy anymore, but audio and video are out of sync now...


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#11 2008-06-03 17:25:00

moljac024
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From: Serbia
Registered: 2008-01-29
Posts: 2,676

Re: Very choppy video performance with my Intel 945GM

How about trying it in other window managers ?

Last edited by moljac024 (2008-06-03 17:25:12)


The day Microsoft makes a product that doesn't suck, is the day they make a vacuum cleaner.
--------------------------------------------------------------------------------------------------------------
But if they tell you that I've lost my mind, maybe it's not gone just a little hard to find...

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#12 2008-06-03 17:45:10

schivmeister
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From: Singapore
Registered: 2007-05-17
Posts: 971
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Re: Very choppy video performance with my Intel 945GM

Are you playing the H.264 1280x768 one? Some scenes (fast movement) are lagging on my side. I'd assume hardware limitation.


I need real, proper pen and paper for this.

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#13 2008-06-03 17:48:16

finferflu
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From: Manchester, UK
Registered: 2007-06-21
Posts: 1,899
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Re: Very choppy video performance with my Intel 945GM

I will definitely try another WM, but I'm quite convinced by schivmeister, since I have downloaded the 1920x1080 one. I guess I was too ambitious tongue


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#14 2008-06-03 17:49:09

moljac024
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From: Serbia
Registered: 2008-01-29
Posts: 2,676

Re: Very choppy video performance with my Intel 945GM

You haven't mentioned that little detail smile


The day Microsoft makes a product that doesn't suck, is the day they make a vacuum cleaner.
--------------------------------------------------------------------------------------------------------------
But if they tell you that I've lost my mind, maybe it's not gone just a little hard to find...

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#15 2008-06-03 17:56:38

finferflu
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From: Manchester, UK
Registered: 2007-06-21
Posts: 1,899
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Re: Very choppy video performance with my Intel 945GM

Yeah, now I know that such details matter as well... I guess now you all know I am a complete beginner when it comes to video stuff.


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#16 2008-06-03 18:55:00

Hohoho
Member
Registered: 2007-06-23
Posts: 222

Re: Very choppy video performance with my Intel 945GM

Heh, 1080p Big Buck Bunny lags like hell on my PC (P4 Northwood 2.8GHz), but 720p runs fine smile

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#17 2008-06-05 13:56:03

timetrap
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Registered: 2008-06-05
Posts: 342
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Re: Very choppy video performance with my Intel 945GM

I had the same problem a while back with a copy of Blade Runner, the 945GMs are not so good at the 1080p. I had to do a LOT before it would even playback 30 seconds without skipping.

But as soon as I played it on a computer with a decent graphics card. All those problems cleared up.

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#18 2008-06-05 15:34:29

Gullible Jones
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Registered: 2004-12-29
Posts: 4,863

Re: Very choppy video performance with my Intel 945GM

Have you tried enabling INTEL_BATCH? Just out of curiousity...

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#19 2008-06-05 18:51:50

finferflu
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From: Manchester, UK
Registered: 2007-06-21
Posts: 1,899
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Re: Very choppy video performance with my Intel 945GM

Gullible Jones wrote:

Have you tried enabling INTEL_BATCH? Just out of curiousity...

What is that?


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#20 2008-06-06 12:45:36

schivmeister
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From: Singapore
Registered: 2007-05-17
Posts: 971
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Re: Very choppy video performance with my Intel 945GM

A hack that apparently increases performance. And, it actually does - really.

echo "export INTEL_BATCH=1" >> ~/.bashrc

For glxgears, you get a big jump from around 700-900FPS to 1400 - 1600. Of course, maximise it to get a real-world value. In games like ET and UbT, I get at least 3-5FPS more with the amount of details and reso I prefer, which makes things more playable.


I need real, proper pen and paper for this.

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#21 2008-06-06 17:32:20

finferflu
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From: Manchester, UK
Registered: 2007-06-21
Posts: 1,899
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Re: Very choppy video performance with my Intel 945GM

Thanks schivmeister, I have tried it and it already feels faster, even though I haven't played any video yes, but the general performance seems indeed improved smile


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