Resolved [solved] PB no target-mode nor bootmanager

Traace

macrumors regular
Original poster
Jul 21, 2018
139
123
Germany
Hi,

I have received a powerbook A1138 hybrid that hasn't any dvd drive but preinstalled with lubuntu. And today the power supply arrived.

Trying to install leopard now. but there are a few issues.

- Target Disk mode "Press T while booting" doesn't work. It only works when triggered in openfirmware via (target-mode) command. But my G5 can't see any of its partitions.
- Boot menu "Press option(alt) while booting" doesn't work at all

openfirmware menu is working fine, but if I try anything "hotkey" related it falls back to yaboot


What did I already tried.. :
- Reset PRAM
- Remove PRAM battery
- Reset NVRAM
- Used another Apple USB keyboard (from G5)
- Tested the firewire cable with a working iBook | just fine


Someone can help? Please :)


Edit: Fixed. It was a strange one. First of all, I notice that the keyboard uses pressure that enables the circuit for a key. CMD was pushedvery hard through the surface resulting in a permanently CMD press, obliviously booting to target-mode or boot selection woudn't be possible with a pressed key, so I cutted the circuit until I found a solution.

Another issue was that I put in a ibook 2005 IDE disk drive, but it turns out a A1138 is very picky about its 2nd drive, pulled it out again.

It works fine now. Thanks for the help.
 
Last edited:

galgot

macrumors regular
May 28, 2015
158
209
Hi,

I have got a powerbook A1138 hybrid that hasn't any dvd drive but preinstalled with lubuntu. And today the power supply arrived.

Trying to install leopard now. but there are a few issues.

- Target Disk mode "Press T while booting" doesn't work. It only works when triggered in openfirmware via (target-mode) command. But my G5 can't see any of its partitions.
- Boot menu "Press option(alt) while booting" doesn't work at all

openfirmware menu is working fine, but if I try anything "hotkey" related it falls back to yaboot


What did I already tried.. :
- Reset PRAM
- Remove PRAM battery
- Reset NVRAM
- Used another Apple USB keyboard (from G5)
- Tested the firewire cable with a working iBook | just fine


Someone can help? Please :)
"preinstalled with ubuntu", if you mean that the all HD is formatted for Lubuntu (ext4) , then i suppose it's normal.
Mac OS X can't read ext4 linux format, so it can't see it in target mode.
Even Disk Utility doesn't see the HD in target mode ?
 
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Traace

macrumors regular
Original poster
Jul 21, 2018
139
123
Germany
"preinstalled with ubuntu", if you mean that the all HD is formatted for Lubuntu (ext4) , then i suppose it's normal.
Mac OS X can't read ext4 linux format, so it can't see it in target mode.
Even Disk Utility doesn't see the HD in target mode ?
No unfortunately its not a normal behavior, the drive doesn't appear in DU on my G5 at all. Yaboot partition should appear in PBs bootmenu too because stock yaboot uses Apple_Bootstrap
 

Amethyst1

macrumors 6502a
Oct 28, 2015
529
743
Does it still have the original hard drive or has that been replaced? If so, an incorrect master/slave configuration could cause these Target Disk Mode anomalies. I believe the "cable select" setting is best avoided too. What does the drive show up as when booted into Linux? /dev/hda, /dev/hdb or something else?
 
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Traace

macrumors regular
Original poster
Jul 21, 2018
139
123
Germany
Does it still have the original hard drive or has that been replaced? If so, an incorrect master/slave configuration could cause these Target Disk Mode anomalies. I believe the "cable select" setting is best avoided too. What does the drive show up as when booted into Linux? /dev/hda, /dev/hdb or something else?
I opened that powerbook and pulled out the hdd, a genuine apple branded 80gb drive without any jumpers. So it should be cable select, right? Then I hooked it up to a external 2.5 IDE -> USB adapter and installed leopard from my g5 & DU.

Afterwards I booted this drive in a working ibook g4 to make sure everything is good.

Now in that powerbook:
- Booting dont work at all expect to openfirmware
- Target Mode via openfirmware freeze system
- Bootmenu via option(alt) still missing

My guess is: nvram destoryed ...
 
Last edited:

Amethyst1

macrumors 6502a
Oct 28, 2015
529
743
I opened that powerbook and pulled out the hdd, a genuine apple branded 80gb drive without any jumpers. So it should be cable select, right? Then I hooked it up to a external 2.5 IDE -> USB adapter and installed leopard from my g5 & DU.

Afterwards I booted this drive in a working ibook g4 to make sure everything is good.

Now in that powerbook:
- Booting dont work at all expect to openfirmware
- Target Mode via openfirmware freeze system
- Bootmenu via option(alt) still missing

My guess is: nvram destoryed ...
What's the model number of the HDD? No jumpers sounds right, though.

Maybe worth trying: With the HDD removed, can you boot the PowerBook from a FireWire HDD or another machine in Target Mode?
 
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