iMac Resolution Issue

[Eric Dunbar]

Hi, I've included the monitor-related xorg.conf info.

I suspect that you are running a Rev A iMac (PPC G3 233 MHz, 2 MB ATI
Rage 3D (?) video card). IIRC this card supported 24 bit colour on
800*600 and only 16 bit on 1024*768!

I have a hunch that you chose 24 bit colour when you installed Ubuntu,
and, since 800*600 is the max supported by the card, that's the max
that would've been written to xorg.conf (purely guessing here).

You'll have to add an entry which is 1024*768 and is running at 16 bit
colour. How to make it the default I'm not sure (listers, any help
here?).

Eric.

On 10/29/05, Eric Dunbar <eric.dunbar at gmail.com> wrote:
> I remember your post now (since you're cross-posting to a list we get
> to delete your original posts... thanks GMail for saving my trash :-).
>
> I've included the WHOLE of your original posts so others so inclined
> may be able to skim it and help you.
>
> A quick look-see suggests to me that your xorg.conf file is improperly
> configured with respect to resolutions. You need to have a 1024*768
> entry and all I see is 800*600. You could manually edit it (make sure
> you have a back-up coopy of the sort-of-working xorg.conf file) or run
> the xFree86config utility (or whatever it is called under Xorg ;-)...
> I'm sure others here could help or perhaps a "man x.org" might tell
> you).
>
> Eric.
>
> On 10/25/05, Mr. Knisely <mrknisely at mrknisely.is-a-geek.org> wrote:
> >
> >
> >
> > I've got a tray loading iMac that I've loaded the PPC verion of Ubuntu on.
> > My display settings are very low, under 640x480 but the exact number escapes
> > me at the moment.
> >
> >  I've seen others have run into this issue before but I've not found the
> > solution for it. Anyone have any suggestions?
> >
> >  Here is my hardware info:
> >  Display:
> >
> > code:
> >  0000:00:12.0 VGA compatible controller: ATI Technologies Inc 3D Rage IIC
> > 215IIC [Mach64 GT IIC] (rev 3a)
> >
> >
> >  Dmesg Junk:
> >
> > code:
> >  [ 0.000000] Total memory = 288MB; using 1024kB for hash table (at c0400000)
> > [ 0.000000] Linux version 2.6.12-9-powerpc (buildd at adare) (gcc version 3.4.5
> > 20050809 (prerelease) (Ubuntu 3.4.4-6ubuntu8)) #1 Mon Oct 10 15:26:45 BST
> > 2005
> > [ 0.000000] Found a Paddington mac-io controller, rev: 0, mapped at
> > 0xfdec0000
> > [ 0.000000] PowerMac motherboard: iMac (first generation)
> >
> >
> >  xorg.conf file:

<snip>

> > Section "Device"
> >  Identifier "ATI Technologies, Inc. 3D Rage IIC 215IIC (Mach64 GT IIC)"
> >  Driver "ati"
> >  BusID "PCI:0:18:0"
> >  Option "UseFBDev" "true"
> > EndSection
> >
> > Section "Monitor"
> >  Identifier "iMac"
> >  Option "DPMS"
> >  HorizSync 60-60
> >  VertRefresh 75-117
> > EndSection
> >
> > Section "Screen"
> >  Identifier "Default Screen"
> >  Device "ATI Technologies, Inc. 3D Rage IIC 215IIC (Mach64 GT IIC)"
> >  Monitor "iMac"
> >  DefaultDepth 24
> >  SubSection "Display"
> >  Depth 1
> >  Modes "800x600"
> >  EndSubSection
> >  SubSection "Display"
> >  Depth 4
> >  Modes "800x600"
> >  EndSubSection
> >  SubSection "Display"
> >  Depth 8
> >  Modes "800x600"
> >  EndSubSection
> >  SubSection "Display"
> >  Depth 15
> >  Modes "800x600"
> >  EndSubSection
> >  SubSection "Display"
> >  Depth 16
> >  Modes "800x600"
> >  EndSubSection
> >  SubSection "Display"
> >  Depth 24
> >  Modes "800x600"
> >  EndSubSection
> > EndSection
> >
> > Section "ServerLayout"
> >  Identifier "Default Layout"
> >  Screen "Default Screen"
> >  InputDevice "Generic Keyboard"
> >  InputDevice "Configured Mouse"
> > EndSection
> >
> > Section "DRI"
> >  Mode 0666
> > EndSection
> >
> >
> >  Is there another configuration file that I just don't see?
> >
> >  I hope this is helpful, and I look forward to any suggestions.
> >
> >  Thanks!
> >
> >  MrKnisely
>