XPost: uk.comp.os.linux   
   From: java@evij.com.invalid   
      
   On 06/06/2024 10:23, Java Jive wrote:   
   > I still have an old PC dual-booting (X)Ubunutu 22 & flavours of Windows.   
   >   Currently, it triple boots via GRUB between Ubuntu 22, Windows XP   
   > 32-bit, & Windows 10, where the OS partitions are all primaries, while   
   > the two data partitions are logical drives in an extended partition:   
   >   
   > Win 10 Pro | Win XP-32 | Ubuntu 22 Root || Win Data | Ubuntu 22 Home ||   
   >   
   > However, now I wish to add another bootable partition, so, instead of   
   > booting from a new volume in the extended partition by shuffling the   
   > existing partitions around to make room for it, I've decided to reformat   
   > the entire disk as GPT/BIOS.   
   >   
   > Accordingly, as a proof of concept and to act as a working Linux system   
   > to boot from while accomplishing this, and to preserve the Windows Data   
   > partition which holds all the necessary Windows images for repopulating   
   > the original disk, I've formatted a spare disk in an external USB dock   
   > as follows ...   
   >   
   > Boot | Win7 | Win 10 | Win 32-bit | Ub 22 Root | Win Data | Ub 22 Home |   
   >   
   > ... have copied the two Ubuntu partitions and the Windows Data   
   > partition, have successfully installed GRUB, which found not just the   
   > Ubuntu on the external disk but also the still existing options on the   
   > internal hard disk and can boot into either Ubuntu.  However, while   
   > Ubuntu on the internal HD still boots normally even though GRUB is now   
   > on the external disk, with the Ubuntu on the latter there is a problem   
   > in that the GUI won't start, and messages concerning trying to start it   
   > disrupt anything that you try to type into the  text console by   
   > constantly switching you back to the primary console, and when you   
   > switch back to the one you're trying to type into, you have just a   
   > couple of seconds or so to type something in before being switched away   
   > again.   
   >   
   > The messages are, where nn is an number incrementing by 1 on each   
   > occurrence (beware possible unintended line wrap) ...   
   >   
   > Starting Light Display Manager...   
   > Started Light Display Manager.   
   > Started session Cnn of User lightdm [ OK ] Stopped Light Display Manager.   
   > Starting Detect the available GPUs and deal with any system changes...   
   > [ 1296.065219*] nouveau 0000:01:00.0 fb: trapped read at 01004b0034 on   
   > channel -1 [0fee0000 unknown]  engine 06 [BAR] client 08 [PFIFO_READ]   
   > subclient 01 [IN] reascon 00000002 [PAGE_NOT_PRESENT]   
   > Finished Detect the available GPUs and deal with any system changes.   
   > [Repeat ad nauseam]   
   >   
   > * this number also increments, I presume it's a time since boot up or   
   > something like that.   
   >   
   > ... which I have reduced to just the nouveau messages by typing ...   
   >   
   >      systemctl stop gpu-manager.service   
   >   
   > ... interspersed with ...   
   >   
   > Starting CUPS scheduler.   
   > Stopped CUPS scheduler.   
   > Stopping CUPS scheduler...   
   > Starting CUPS scheduler.   
   > [FAILED] Failed to start CUPS scheduler.   
   > See 'systemctl status cups.service' for details   
   >   
   > ... though I think I've managed to stop these latter by typing ...   
   >   
   >      systemctl stop cups.service   
   >   
   > I'm guessing that Ubuntu is trying to find a display chip in the   
   > hardware of the dock, which of course is bound to fail, and to fix it I   
   > will have temporarily to swap the disks around, which is what I will try   
   > next, but can anyone explain exactly what is going wrong, and suggest   
   > how to make it work?  For example, how does a suck-it-and-see Linux   
   > distro USB stick avoid this situation?   
      
   No, swapping the disks hasn't helped.  I now have only the nouveau   
   messages, but still no GUI.   
      
      
      
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