Incorrect refresh rate with i915 video on FC4
Ryan J. McDonough
rmcdonough at mac.com
Sun Jun 26 17:28:37 UTC 2005
I'm having a heck of a time getting my display to work properly. I have
an HP Pavilion a730n which has an i915 graphics board running Fedora
Core 4. The display it's hooked up to is a Samsung 770TFT. I run the
display at 1280 x 1024. Under Windows the driver would always revert
back to 60Hz on each reboot, which always makes the display blurry.
However, I could always adjust the refresh rate to 72Hz and everything
was peachy.
Xorg is a different story. No matter what I do, the display seems to
behave as if it's running at 60Hz but the Gnome Screen Resolution claims
it's running at 76Hz (which is out of range). I've tried creating a
ModeLine which seems to make things a little better, but not great.
Here's the parts of my Xorg config that is relevant:
Section "Monitor"
Identifier "Monitor0"
VendorName "Monitor Vendor"
ModelName "S/M 770TFT"
DisplaySize 340 270
HorizSync 30.0 - 81.0
VertRefresh 56.0 - 85.0
Option "DPMS"
ModeLine "1280x1024" 138.54 1280 1368 1504 1728 1024 1025 1028
1069 -HSync +Vsync
# 1280x1024 @ 72.00 Hz (GTF) hsync: 76.82 kHz; pclk: 132.75 MHz
ModeLine "1280x1024_72.00" 132.75 1280 1368 1504 1728 1024 1025
1028 1067 -HSync +Vsync
EndSection
Section "Device"
Identifier "Videocard0"
Driver "i810"
VendorName "Videocard vendor"
BoardName "Intel 915"
EndSection
Section "Screen"
Identifier "Screen0"
Device "Videocard0"
Monitor "Monitor0"
DefaultDepth 24
SubSection "Display"
Viewport 0 0
Depth 24
Modes "1280x1024_72.00" "1280x1024" "1152x864" "1024x768" "800x600"
"640x480"
EndSubSection
EndSection
I have taken a look at Bug 132276:
https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=132267
Since this sounded like a similar problem, i tried adding the "NoAccel"
option. All this did was make scrolling really slow, the blurriness was
still present. Any thoughts would be GREATLY appreciated! Thanks!
Ryan-
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