[Bug 242562] Re: slashdot comment options bar slows down scrolling
CowboyTim
tim__aerts at hotmail.com
Fri Aug 15 18:43:30 UTC 2008
I have exactly the same problem on a SunRay 1g, where the Xnewt X server
is used. I'm using this on ubuntu 8.04.1 64-bit, desktop install. It's
on a quite fast machine: dual quad core 3.2 GHz. After realizing that I
had seen that problem elsewhere before, I realized that that was on my
home PC: quad core 2.4 GHz, with nvidia 8800GTX 768 MB card (also ubuntu
8.04.1 64-bit), drivers for nvidia: 173.14.
I've read on more forums that this problem it is proabaly related to
nvidia for the hardware acceleration in their drivers or such. I don't
think this is the case, as the SunRay 1g stuff uses an all-software
Xnewt (which appears to be a derivative of Xorg 6.x), and the graphics
card is certainly not an nvidia - not being used by that x server,
except for a console (note that this is a server, not a workstation).
Here's the xdpyinfo output, as the performance problem looks to be the
same as for the nvidia people, they also reported this slashdot comment
page panel dock, and they claim it to be one of the badly implemented
extensions thus:
cowboytim at kwabber():~ > xdpyinfo -display :11
name of display: :11.0
version number: 11.0
vendor string: The X.Org Foundation
vendor release number: 60802000
X.Org version: 6.8.2
maximum request size: 16777212 bytes
motion buffer size: 256
bitmap unit, bit order, padding: 32, LSBFirst, 32
image byte order: LSBFirst
number of supported pixmap formats: 2
supported pixmap formats:
depth 1, bits_per_pixel 1, scanline_pad 32
depth 24, bits_per_pixel 32, scanline_pad 32
keycode range: minimum 8, maximum 254
focus: window 0xa00011, revert to PointerRoot
number of extensions: 24
BIG-REQUESTS
DAMAGE
DEC-XTRAP
DOUBLE-BUFFER
DPMS
Extended-Visual-Information
GLX
LBX
MIT-SCREEN-SAVER
MIT-SHM
MIT-SUNDRY-NONSTANDARD
RECORD
SECURITY
SGI-GLX
SHAPE
SYNC
TOG-CUP
X-Resource
XC-APPGROUP
XC-MISC
XFIXES
XInputExtension
XTEST
XVideo
default screen number: 0
number of screens: 1
screen #0:
dimensions: 1280x1024 pixels (361x289 millimeters)
resolution: 90x90 dots per inch
depths (1): 24
root window id: 0x29
depth of root window: 24 planes
number of colormaps: minimum 1, maximum 1
default colormap: 0x21
default number of colormap cells: 256
preallocated pixels: black 0, white 16777215
options: backing-store YES, save-unders YES
largest cursor: 64x64
current input event mask: 0x72003c
ButtonPressMask ButtonReleaseMask EnterWindowMask
LeaveWindowMask StructureNotifyMask SubstructureRedirectMask
FocusChangeMask PropertyChangeMask
number of visuals: 4
default visual id: 0x23
visual:
visual id: 0x23
class: TrueColor
depth: 24 planes
available colormap entries: 256 per subfield
red, green, blue masks: 0xff, 0xff00, 0xff0000
significant bits in color specification: 8 bits
visual:
visual id: 0x24
class: TrueColor
depth: 24 planes
available colormap entries: 256 per subfield
red, green, blue masks: 0xff, 0xff00, 0xff0000
significant bits in color specification: 8 bits
visual:
visual id: 0x25
class: TrueColor
depth: 24 planes
available colormap entries: 256 per subfield
red, green, blue masks: 0xff, 0xff00, 0xff0000
significant bits in color specification: 8 bits
visual:
visual id: 0x26
class: TrueColor
depth: 24 planes
available colormap entries: 256 per subfield
red, green, blue masks: 0xff, 0xff00, 0xff0000
significant bits in color specification: 8 bits
I'v tried this with the ubuntu stock firefox, 3.0.1+build1+nobinonly-
0ubuntu0.8.04.3 (which is 64-bit), and also with a downloaded firefox:
firefox-3.0.1.tar.bz2 (32-bit).
--
slashdot comment options bar slows down scrolling
https://bugs.launchpad.net/bugs/242562
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