Re: Display goes offline at install boot

[Bradley Pearce <bottleworksnet%gmail.com@localhost>]

Thanks for your help.
The following resolved the issue:

userconf disable i915drmkms*
boot


Thanks!


On 10/25/23, Greg Troxel <gdt%lexort.com@localhost> wrote:
> Bradley Pearce <bottleworksnet%gmail.com@localhost> writes:
>
>> I'm trying to install NetBSD on a 32-bit Intel based Mac Mini.  It
>> starts booting into the OS and right after it outputs "kern info:
>> [drm] applying backlight present quirk", the monitor looses connection
>> to the computer.  The OS clearly continues booting as I can hear the
>> CD drive working.  Once the screen is off, I can't get it to come back
>> up.
>>
>> At the boot prompt, I've selected option 3 and tried all of the
>> following without success.
>> boot> userconf disable i915drmkms*
>> boot> boot
>> -and-
>> boot> userconf disable radeon
>> boot> boot
>> -and-
>> boot> userconf disable igmafb
>> boot> boot
>>
>> It was all just a shot in the dark, but didn't effect anything.  Any
>> ideas?
>> According to the internet, specs of the system are 1.5Ghz Core Solo
>> (T1200), graphics = Intel GMA 950 DVI output.
>
> I would:
>
>   video record the boot so you can see what was there in total just
>   before boot
>
>   disable all of those things, not just one at a time
>
>   read the code around 'backlight present quirk' and see if that leads
>   to any suggestions
>
>