On my machine with an ATI card, the boot parameters "radeon.modeset=0" or
"nomodeset" work. So on the second Yaboot screen, I type either "Linux
radeon.modeset=0" or "Linux nomodeset" to disable KMS. For machines with
Nvidia cards, you can do either "Linux nomodeset" or "Linux nouveau.modeset=0".
To make the boot parameters permanent so you don't have to type them in
anymore, add them with the "append" line to your yaboot.conf like this:
image=/boot/vmlinux
label=Linux
read-only
initrd=/boot/initrd.img
append="nomodeset video=offb:off"
I added the "video=offb:off" parameter because my machine experienced a bug
where the open firmware framebuffer was inhibiting the fall-back radeon
framebuffer from loading:
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=782066
Also, don't forget to run "sudo ybin -v" after changing yaboot.conf. I always
forget that.
Regards,
Dan
--------------------------------------------
On Thu, 4/30/15, Rick Thomas <rbtho...@pobox.com> wrote:
Subject: Re: PowerMac G5, GeForce FX 5200, black screen
To: "Dan DeVoto" <dand1...@yahoo.com>
Cc: "luigi burdo" <intermedi...@hotmail.com>, "Risto Suominen"
<risto.suomi...@gmail.com>, "PowerPC List Debian"
<debian-powerpc@lists.debian.org>
Date: Thursday, April 30, 2015, 5:39 PM
Disabling KMS sounds like
something I could try (as I say, no X running on this
machine).
How do I do
that?
Thanks!
Rick
On Apr
30, 2015, at 2:02 PM, Dan DeVoto wrote:
> I have the black screen problem on my
iBook. It happens about halfway through the boot process,
when kernel modesetting is enabled. I left a bug
report:
>
> https://bugs.freedesktop.org/show_bug.cgi?id=90220
>
> A workaround is to
boot with parameters that disabled KMS, but if you have X
running you'll have an unaccelerated desktop.
>
> Regards,
>
> Dan
>
>
>
--------------------------------------------
> On Thu, 4/30/15, Rick Thomas <rbtho...@pobox.com>
wrote:
>
> Subject:
Re: PowerMac G5, GeForce FX 5200, black screen
> To: "luigi burdo" <intermedi...@hotmail.com>
> Cc: "Risto Suominen" <risto.suomi...@gmail.com>,
"PowerPC List Debian" <debian-powerpc@lists.debian.org>
> Date: Thursday, April 30, 2015, 1:35 PM
>
>
> I
> don’t have X.org
on this machine. I’m trying to keep
>
it as simple as possible, so I did not install any
desktop
> task. Just the basic virtual
terminal console.
>
>
Even so, I get the usual text
> streaming
by during the boot process, but then a blank
> screen. The system is up — I can ssh
into it, but no
> console.
>
> Anybody know
> what’s causing it?
>
> Rick
>
> On Apr
> 30, 2015, at
5:02 AM, luigi burdo <intermedi...@hotmail.com>
> wrote:
>
>> I start have
> this
issue on Jessie
>> but the black
> screen is the simptom i face because Xorg
make a hard crash
> (reported to xorg
devs).
>> switch to tty
> ... and try to make xinit or start x .
>>
>
>> On wheezy delete the xorg.conf and
> probably you will fix it
>>
>> Luigi
Burdo
>>
>>>
Subject: Re: PowerMac G5, GeForce FX
>
5200, black screen
>>> From: rbtho...@pobox.com
>>> Date: Thu, 30 Apr 2015 02:49:42
> -0700
>>> CC: debian-powerpc@lists.debian.org
>>> To: risto.suomi...@gmail.com
>>>
>>>
Hi
> Risto,
>>>
>>>
> I’m
seeing this as well. I have a PowerMac11,2 (dual core
> G5 7GB RAM)
>>>
>>
>> Did you
ever discover how to fix it without holding
> back on the kernel level?
>>>
>>>
Anybody? All clues are welcome!
>>>
>>> Thanks!
>>> Rick
>>>
>>> On Dec 1, 2014, at 6:16 AM,
Risto
> Suominen <risto.suomi...@gmail.com>
> wrote:
>>>
>>>
>> Hi,
>>>>
>>>> This is probably an old
issue,
> possibly discussed before, even
on this list.
>>>>
>>>>
> I've
been holding my linux-image as version 3.2.0-2 to
> avoid the problem.
>>>>
>>>> So, the problem: after
upgrading
> to 3.2.0-4, X display is not
working.
>>
>>> According to Xorg.log everything
is as before, but
> the screen remains
>>>> black. (At
> boot the text console is ok.)
>>>>
>
>>>> I'm using kernel
command
> line:
>>>>
>>
>>> video=TV-1:d
>>>>
>>>> and xorg.conf:
>>>>
>>>>
> Section
"Device"
>>>>
> Identifier "Configured Video
Device"
>>>> BusID
> "PCI:240:16:0"
>>>>
> Driver
"nouveau"
>>>>
> Option "Monitor-TV-1"
"Configured
> Monitor"
>>>> Option
> "NoAccel"
"true"
>>>>
EndSection
>>
>>>
>>>>
Section
> "Monitor"
>>>>
>
Identifier "Configured Monitor"
>>>> Option "Ignore"
> "true"
>>>>
>
EndSection
>>>>
>>>> Section "Screen"
>>>> Identifier "Default
> Screen"
>>>> Device
>
"Configured Video Device"
>>
>>> EndSection
>>>>
>>>> In addition, I've tried
to
> add /etc/modprobe.d/nouveau.conf:
>>>
>>
>>>> nouveau noaccel=1
>>>>
>>>>
> It makes
no difference.
>>>>
>>>> I'm using Wheezy (7.7)
with
> all latest packages.
>>>>
>>>> The machine is PowerMac7,3
> (2x1,8 GHz, 1,25 GB RAM).
>>>>
>>>> Anyone else seen this?
>>>>
>>>>
> Risto
>>>>
>
>
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