On 9/22/12 5:55 PM, Robert Heller wrote:
First of all, using the VGA connection, the X server *refuses* to use
any Modeline that is not a 4:3 aspect ratio. It seems that the X
server presumes that *all* VGA connected monitors are 4:3. (All three
of the new wide screen monitors do have 15-pin VGA connections, so this
'presumption' is obviously false, esp. since the monitors using DDC
while connection via VGA are suggesting 16:9 mode lines.)
It's not the X server's fault.
The i810 driver, when it comes to output setup, is no better than the
vesa driver. It can only set modes that happen to be listed in the
video BIOS, regardless of what the display happens to claim to support.
Since most 845 video BIOSes predate the wide availability of 16:9
monitors, they naturally tend not to list any 16:9 modes.
RHEL5 (and therefore CentOS 5) does include an additional video driver
for Intel graphics chips called 'intel' instead of 'i810', which does
not have this limitation. I don't recall offhand whether that version
worked correctly with 8xx-series chips; it might, I don't think I went
out of my way to disable that, but if it doesn't work you get to keep
both pieces.
Alternatively, go search for 'i915resolution', which will allow you to
override Intel VBIOS mode lists (and yes it does work on 8xx chips
despite the name).
- ajax
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