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[Bug 380413] [NEW] Windows move/scroll slowly on a [SiS] 86C326 5598/6326 card

To: ubuntu-x-swat@xxxxxxxxxxxxxxxxxxx
From: Launchpad Bug Tracker <380413@xxxxxxxxxxxxxxxxxx>
Date: Sat, 11 Sep 2010 18:56:42 -0000
Reply-to: Bug 380413 <380413@xxxxxxxxxxxxxxxxxx>
Sender: bounces@xxxxxxxxxxxxx

You have been subscribed to a public bug:

Moving windows and scrolling eat a lot of CPU, and everything goes
pretty slow. It's old hardware, but I can see the window redrawing when
I write something in a terminal on GNOME; that makes me think there's a
problem somewhere.

Let me show you CPU usage when moving a window:
$ vmstat 1
procs -----------memory---------- ---swap-- -----io---- -system-- ----cpu----
 r  b   swpd   free   buff  cache   si   so    bi    bo   in   cs us sy id wa
 4  0  74388   7724   9444  96560    0    1     9     5  266   98  4  1 95  0
 1  0  74388   7892   9444  96560    0    0     0     0  543 1095 35 15 49  0
 0  0  74388   7892   9444  96560    0    0     0     0  416  874 26  9 65  0
 1  0  74388   7816   9444  96596    0    0    36     0  706 1185 72 20  7  1
 1  0  74388   7816   9444  96596    0    0     0     0  688  926 82 18  0  0
 2  0  74388   7816   9444  96596    0    0     0     0  688 1029 78 22  0  0
 3  0  74388   7076   9444  96596    0    0     0     0  657  943 78 18  4  0
 1  0  74388   6988   9444  96596    0    0     0     0  738  707 85 15  0  0
 1  0  74388   6920   9444  96596    0    0     0     0  598  764 83 17  0  0
 2  0  74388   7832   9444  96596    0    0     0     0  565 1102 40 19 41  0

Information about the hardware:
$ sudo lspci
00:00.0 Host bridge: VIA Technologies, Inc. VT82C693A/694x [Apollo PRO133x] (rev 44)
00:01.0 PCI bridge: VIA Technologies, Inc. VT82C598/694x [Apollo MVP3/Pro133x AGP]
00:07.0 ISA bridge: VIA Technologies, Inc. VT82C686 [Apollo Super South] (rev 22)
00:07.1 IDE interface: VIA Technologies, Inc. VT82C586A/B/VT82C686/A/B/VT823x/A/C PIPC Bus Master IDE (rev 10)
00:07.2 USB Controller: VIA Technologies, Inc. VT82xxxxx UHCI USB 1.1 Controller (rev 10)
00:07.3 USB Controller: VIA Technologies, Inc. VT82xxxxx UHCI USB 1.1 Controller (rev 10)
00:07.4 Host bridge: VIA Technologies, Inc. VT82C686 [Apollo Super ACPI] (rev 30)
00:07.5 Multimedia audio controller: VIA Technologies, Inc. VT82C686 AC97 Audio Controller (rev 20)
00:09.0 Communication controller: Motorola SM56 PCI Modem
00:0b.0 Ethernet controller: VIA Technologies, Inc. VT6105/VT6106S [Rhine-III] (rev 8b)
01:00.0 VGA compatible controller: Silicon Integrated Systems [SiS] 86C326 5598/6326 (rev 0b)

I'm on Ubuntu 9.04:
$ sudo lsb_release -rd
Description:	Ubuntu 9.04
Release:	9.04

I'll attach Xorg's log file now. It seems to be using the driver for sis
cards, so it looks normal to me.

** Affects: xorg (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: card graphics moving scrolling sis slow
-- 
Windows move/scroll slowly on a [SiS] 86C326 5598/6326 card
https://bugs.launchpad.net/bugs/380413
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