Re: Garbled installer screen output on 2010 Macbook Air using 11-RC2

["requiem." <rqm%0xde501a7a.net@localhost>]

Dear Martin

Thank you for the reply.

`gop` returns the following output:

```
> gop
0: 1366x768 BGRR pitch 1366 bpp 32
```

OpenBSD, for comparison, says,

```
boot> machine gop
Mode 0: 1366 x 768 (stride = 2048)

Current Mode = 0
```

Would this be a matter of adjusting boot parameters to something similar?

Rqm

1 Apr 2026 12:53:41 Martin Husemann <martin%duskware.de@localhost>:

> On Wed, Apr 01, 2026 at 12:14:59PM +0100, requiem. wrote:
>> After the initial "boot count" I immediately end up at the attached screen, where it hangs - or at least I cannot see further output.
> 
> The picture shows nearly readable green kernel output, but the pixel stride
> obiviously is off by a small amount, so each line on the screen is starting
> a few pixels shifted to the right.
> 
> The total width seems to be wrong too.
> 
> So the dumb framebuffer attached gets proper start address but bad image
> parameters from the bootloader/UEFI.
> 
> Can you interrupt the boot process early (when it counts down the boot timer)
> and issue a
> 
>     gop
> 
> command? This should tell us what options the bootloader thinks are available
> and what it would pick by default.
> 
> Martin