On Thu, Apr 17, 2008 at 10:18 AM, matt hull <mattmatteh@...> wrote:
>
>
>  i think the problem is that you are using vga, radeonfb has no idea what is
> connected, a guess without being there to see.  try appending the video size
> like video=radeonfb:1920x1200-24@60.  you should be able to get the current
> mode from using open firmware frame buffer /sys/class/graphics/
>

Hi Matt,
   I very much appreciate you taking the time to make a guess. Thanks.
We're making headway but still not quite there yet.

   Scanning through stuff that looks helpful I booted the CD with
apple video=ofonly. Here's some data:

livecd fb0 # cat virtual_size
1024,768
livecd fb0 # cat modes
U:1024x768p-116
livecd fb0 # cat name
OFfb ATY,RockHo
livecd fb0 # cat bits_per_pixel
8

Most of the other things don't have values set.

   Using the values above I tried booting the CD again with this setting

apple video=radeonfb:1024x768-8:60

and it worked fine. My monitor is stable and readable. Now shelling in
I see this::

livecd fb0 # cat name
ATI Radeon Yb
livecd fb0 # cat virtual_size
1024,768
livecd fb0 # cat modes
S:640x480p-85
S:800x600p-85
S:1024x768p-85
S:1280x1024p-85
S:1600x1200p-75
V:1153x864p-75
V:1280x1024p-75
V:1024x768p-75
V:1024x768p-70
V:1024x768p-60
V:1024x768i-53
U:832x624p-75
V:800x600p-75
V:800x600p-72
V:800x600p-60
V:800x600p-56
V:640x480p-75
V:640x480p-72
U:640x480p-67
V:640x480p-60
U:720x400p-88
U:720x400p-70
livecd fb0 # cat bits_per_pixel
8
livecd fb0 #

OK, so I then booted from the hard drive and modified /etc/yaboot.conf
like this:

image=/boot/kernel-2.6.24-gentoo-r3
        label=2.6.24-gentoo-r3
        root=/dev/hda4
        partition=4
        append="video=radeonfb:1024x768-8@60"
        read-only

Unfortunately when I reboot from the drive this time the monitor is
not stable. Same bad screen I've been getting.

Here's what I'm seeing in dmesg:

Macintosh non-volatile memory driver v1.1
PCI: Enabling device 0000:00:10.0 (0006 -> 0007)
radeonfb (0000:00:10.0): Invalid ROM signature 0 should be 0xaa55
radeonfb: Retrieved PLL infos from Open Firmware
radeonfb: Reference=27.00 MHz (RefDiv=12) Memory=190.00 Mhz, System=250.00 MHz
radeonfb: PLL min 12000 max 35000
i2c-adapter i2c-2: unable to read EDID block.
i2c-adapter i2c-2: unable to read EDID block.
i2c-adapter i2c-2: unable to read EDID block.
radeonfb: Monitor 1 type CRT found
radeonfb: EDID probed
radeonfb: Monitor 2 type CRT found
radeonfb: EDID probed
Console: switching to colour frame buffer device 90x25
radeonfb (0000:00:10.0): ATI Radeon Yb
vga16fb: initializing
vga16fb: mapped to 0x000a0000
fb1: VGA16 VGA frame buffer device

and the current settings:

MacMini fb0 # cat name
ATI Radeon Yb
MacMini fb0 # cat virtual_size
720,400
MacMini fb0 # cat modes
S:640x480p-85
S:800x600p-85
S:1024x768p-85
S:1280x1024p-85
S:1600x1200p-75
V:1153x864p-75
V:1280x1024p-75
V:1024x768p-75
V:1024x768p-70
V:1024x768p-60
V:1024x768i-43
U:832x624p-75
V:800x600p-75
V:800x600p-72
V:800x600p-60
V:800x600p-56
V:640x480p-75
V:640x480p-72
U:640x480p-67
V:640x480p-60
U:720x400p-88
U:720x400p-70
MacMini fb0 # cat bits_per_pixel
8

So, why is it in a 720x400 mode?

A couple of other questions. I'm assuming the 'p' or 'i' in the mode
names above are progressive vs. interlace? Should I be including that
in how I describe the name in yaboot.conf?

Also, what are the S, V & U at the start of each mode name?

Thanks,
Mark
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