| 2010-04-17 01:46:13 |
aeromojito |
description |
Binary package hint: xserver-xorg-video-neomagic
Playing DVD or other video results in dropped frames and high CPU usage on a Neomagic NM2380 chip (MagicMedia 256XL+). The problem is evident in VLC and Totem. This was not the case in Hardy. The difference has been traced to the absence of the MTRR setting for video acceleration. This bug also exists in Jaunty and Karmic but I have not tested Intrepid.
In Lucid (10.04):
cat /proc/mtrr
reg00: base=0x000000000 ( 0MB), size= 256MB, count=1: write-back
reg01: base=0x010000000 ( 256MB), size= 128MB, count=1: write-back
In Hardy (8.04):
cat /proc/mtrr
reg00: base=0x000000000 ( 0MB), size= 256MB, count=1: write-back
reg01: base=0x010000000 ( 256MB), size= 128MB, count=1: write-back
reg02: base=0x0fc000000 ( 4032MB), size= 8MB, count=1: write-combining
Entering the command
echo "base=0xfc000000 size=0x800000 type=write-combining" > /proc/mtrr
in a terminal will set the MTRR but it will be reset at boot or when the X-server is restarted. |
Binary package hint: xserver-xorg-video-neomagic
Playing DVD or other video results in dropped frames and high CPU usage on a Neomagic NM2380 chip (MagicMedia 256XL+). The problem is evident in VLC and Totem. This was not the case in Hardy. The difference has been traced to the absence of the MTRR setting for video acceleration. This bug also exists in Jaunty and Karmic but I have not tested Intrepid.
In Lucid (10.04):
cat /proc/mtrr
reg00: base=0x000000000 ( 0MB), size= 256MB, count=1: write-back
reg01: base=0x010000000 ( 256MB), size= 128MB, count=1: write-back
In Hardy (8.04):
cat /proc/mtrr
reg00: base=0x000000000 ( 0MB), size= 256MB, count=1: write-back
reg01: base=0x010000000 ( 256MB), size= 128MB, count=1: write-back
reg02: base=0x0fc000000 ( 4032MB), size= 8MB, count=1: write-combining
Entering the command
echo "base=0xfc000000 size=0x800000 type=write-combining" > /proc/mtrr
in a terminal will set the MTRR but it will be reset at boot or when the X-server is restarted.
---
Architecture: i386
DistroRelease: Ubuntu 10.04
InstallationMedia: Ubuntu 10.04 "Lucid Lynx" - Beta i386 (20100406.1)
Package: xserver-xorg-video-neomagic 1:1.2.4-2
PackageArchitecture: i386
ProcEnviron:
LANG=en_US.UTF-8
SHELL=/bin/bash
ProcVersionSignature: Ubuntu 2.6.32-19.28-generic 2.6.32.10+drm33.1
Tags: lucid
Uname: Linux 2.6.32-19-generic i686
UnreportableReason: This is not a genuine Ubuntu package
UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare
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