On Thu, 13 Apr 2023 10:39:52 -0400
Nuno Vasconcellos <nvasconcel...@videotron.qc.ca> wrote:

> Updating:
> 
> I upgraded from 7.2 to 7.3 and got the same problem.

Sorry, I had missed your report until now.

You have an Apple eMac G4 (1.25 GHz PowerMac6,4).
When you boot OpenBSD/macppc, your screen goes blank here,

root on wd0a (e4d1ce90095ba4d8.a) swap on wd0b dump on wd0b
radeondrm0: RV280
[drm] *ERROR* Unable to locate a BIOS ROM
    ---- screen goes blank ----
radeondrm0: 1024x768, 16bpp

My PowerBook G4 (1.5 GHz PowerBook5,4) works well,

root on wd0a (7f743336b2c4e92e.a) swap on wd0b dump on wd0b
radeondrm0: RV350
[drm] *ERROR* Unable to locate a BIOS ROM
radeondrm0: 1280x854, 32bpp

I suspect that your "1024x768, 16bpp" mode doesn't work with your
eMac's internal display.  Your "16bpp" looks strange.  Until now,
I believed that OpenBSD always defaulted to 32bpp.

I don't know if we are missing 16bpp support or have a problem
detecting modes (EDID), but the fix would require changes to the
kernel's radeondrm code.  I don't know the fix.

Doing "disable radeondrm" in boot_config(8) might work around the
problem.

> In addition, I noticed that one step mentioned in the installation 
> instructions did not happen. The installation instructions has the following 
> paragraph:
> 
> You will next be asked whether you intend to run the X Window System on your 
> machine. The install program needs to know this, to change a configuration 
> setting controlling whether the X server will be able to access the xf86(4) 
> driver; it is not necessary to answer "y" to this question if you only intend 
> to run X client programs on a remote display. If you answered "y" to this 
> question, you will get asked whether you want to start xenodm(1) on boot.

We skip this question on radeondrm, because it doesn't need the
xf86(4) driver.  A macppc with ATI Rage 128 or Nvidia graphics would
need xf86(4).

--George

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