Re: Boot failure with ppc64 port on iMacs G5
Hi, On Wed, 2024-03-06 at 12:57 +1100, Michael Ellerman wrote: > > p, the second, older image works as expected. However, the recent one does > > not > > and I have absolutely no clue why. > > I actually tested both, and both work, but then I cited the wrong one in > my email >_< > > So at least on qemu that newer kernel is OK: > > Preparing to boot Linux version 6.6.15-powerpc64 > (debian-ker...@lists.debian.org) (gcc-13 (Debian 13.2.0-13) 13.2.0, GNU ld > (GNU Binutils for Debian) 2.42) #1 SMP Debian 6.6.15-2 (2024-02-04) > ... > Booting Linux via __start() @ 0x0480 ... > Hello World ! > smp_core99_probe > smp_core99_bringup_done > Starting system log daemon: syslogd, klogd. Here is a freshly generated image using kernel 6.7.12 as the installer kernel: > https://cdimage.debian.org/cdimage/ports/tests/ppc64-test-20240511/debian-12.0.0-ppc64-NETINST-1.iso Still hangs for me with QEMU emulating a PPC970. Will retest once kernel 6.8.x enters Debian unstable. Adrian -- .''`. John Paul Adrian Glaubitz : :' : Debian Developer `. `' Physicist `-GPG: 62FF 8A75 84E0 2956 9546 0006 7426 3B37 F5B5 F913
Re: Boot failure with ppc64 port on iMacs G5
Hi Michael, On Wed, 2024-03-06 at 12:57 +1100, Michael Ellerman wrote: > > Yep, the second, older image works as expected. However, the recent one > > does not > > and I have absolutely no clue why. > > I actually tested both, and both work, but then I cited the wrong one in > my email >_< > > So at least on qemu that newer kernel is OK: > > Preparing to boot Linux version 6.6.15-powerpc64 > (debian-ker...@lists.debian.org) (gcc-13 (Debian 13.2.0-13) 13.2.0, GNU ld > (GNU Binutils for Debian) 2.42) #1 SMP Debian 6.6.15-2 (2024-02-04) > ... > Booting Linux via __start() @ 0x0480 ... > Hello World ! > smp_core99_probe > smp_core99_bringup_done > Starting system log daemon: syslogd, klogd. Did you get around testing the images on real hardware? And can tell me what command line you used for booting with QEMU? Maybe that gives us a clue where the problem is. Users are still reporting boot lockups with kernel 6.6.x. Adrian -- .''`. John Paul Adrian Glaubitz : :' : Debian Developer `. `' Physicist `-GPG: 62FF 8A75 84E0 2956 9546 0006 7426 3B37 F5B5 F913
Re: Boot failure with ppc64 port on iMacs G5
John Paul Adrian Glaubitz writes: > On Fri, 2024-03-01 at 12:56 +1100, Michael Ellerman wrote: >> That second iso boots OK for me in qemu. It boots grub and then the >> kernel loads and shows: >> >> Loading ... >> OF stdout device is: /pci@f000/mac-io@c/escc@13000/ch-a@13020 >> Preparing to boot Linux version 6.3.0-1-powerpc64 >> (debian-ker...@lists.debian.org) (gcc-12 (Debian 12.3.0-2) 12.3.0, GNU ld >> (GNU Binutils for Debian) 2.40) #1 SMP Debian 6.3.7-1 (2023-06-12) >> Detected machine type: 0400 >> command line: BOOT_IMAGE=/install/vmlinux --- quiet >> memory layout at init: >> memory_limit : (16 MB aligned) >> alloc_bottom : 05e7 >> alloc_top: 3000 >> alloc_top_hi : 8000 >> rmo_top : 3000 >> ram_top : 8000 >> copying OF device tree... >> Building dt strings... >> Building dt structure... >> Device tree strings 0x05e8 -> 0x05e80560 >> Device tree struct 0x05e9 -> 0x05ea >> Quiescing Open Firmware ... >> Booting Linux via __start() @ 0x0200 ... >> Hello World ! >> smp_core99_probe >> smp_core99_bringup_done >> Starting system log daemon: syslogd, klogd. >> >> And eventually starts the installer. > > Yep, the second, older image works as expected. However, the recent one does > not > and I have absolutely no clue why. I actually tested both, and both work, but then I cited the wrong one in my email >_< So at least on qemu that newer kernel is OK: Preparing to boot Linux version 6.6.15-powerpc64 (debian-ker...@lists.debian.org) (gcc-13 (Debian 13.2.0-13) 13.2.0, GNU ld (GNU Binutils for Debian) 2.42) #1 SMP Debian 6.6.15-2 (2024-02-04) ... Booting Linux via __start() @ 0x0480 ... Hello World ! smp_core99_probe smp_core99_bringup_done Starting system log daemon: syslogd, klogd. cheers
Re: Boot failure with ppc64 port on iMacs G5
On Fri, Mar 01, 2024 at 03:47:26PM +0100, John Paul Adrian Glaubitz wrote: > The problem is that the newer image doesn't boot and currently I don't know > why because installing the exact same kernel later from the package manager > into an installed system works yields a bootable system with the latest > kernel. > > The installer images are built from the same kernel package which makes the > whole thing even more confusing. Perhaps it's a memory allocation problem before the kernel has fully configured the MMU? I know in the past the kernel could be touchy about how memory was mapped in the very early stages of boot. If we happened to be near some limit, even a small increase in the size of the kernel might have pushed us over the edge. I'm not sure of the exact details, but perhaps the memory setup is slightly different when booted from the CD image. I haven't looked at recent images, but I know in the past the boot process was different on CD compared to after the install. Brad Boyer f...@allandria.com
Re: Boot failure with ppc64 port on iMacs G5
Hi Michael, On Fri, 2024-03-01 at 12:56 +1100, Michael Ellerman wrote: > OK. > > That second iso boots OK for me in qemu. It boots grub and then the > kernel loads and shows: > > Loading ... > OF stdout device is: /pci@f000/mac-io@c/escc@13000/ch-a@13020 > Preparing to boot Linux version 6.3.0-1-powerpc64 > (debian-ker...@lists.debian.org) (gcc-12 (Debian 12.3.0-2) 12.3.0, GNU ld > (GNU Binutils for Debian) 2.40) #1 SMP Debian 6.3.7-1 (2023-06-12) > Detected machine type: 0400 > command line: BOOT_IMAGE=/install/vmlinux --- quiet > memory layout at init: > memory_limit : (16 MB aligned) > alloc_bottom : 05e7 > alloc_top: 3000 > alloc_top_hi : 8000 > rmo_top : 3000 > ram_top : 8000 > copying OF device tree... > Building dt strings... > Building dt structure... > Device tree strings 0x05e8 -> 0x05e80560 > Device tree struct 0x05e9 -> 0x05ea > Quiescing Open Firmware ... > Booting Linux via __start() @ 0x0200 ... > Hello World ! > smp_core99_probe > smp_core99_bringup_done > Starting system log daemon: syslogd, klogd. > > And eventually starts the installer. Yep, the second, older image works as expected. However, the recent one does not and I have absolutely no clue why. > That's using no VGA, so possibly there's something wrong with the video > setup on real hardware: > > $ qemu-system-ppc64 -nographic -vga none -M mac99,via=pmu -smp 1 -m 2G -nic > user -drive > file=$HOME/debian-12.0.0-ppc64-NETINST-1.2023-06-18.iso,format=raw,media=cdrom > -boot d > > I'll try and find time to test it on my actual G5 next week when I'm in > the office. The video issue can usually be worked around by disabling mode-setting or passing other kernel options related to the video card. That's not the main problem here though. The problem is that the newer image doesn't boot and currently I don't know why because installing the exact same kernel later from the package manager into an installed system works yields a bootable system with the latest kernel. The installer images are built from the same kernel package which makes the whole thing even more confusing. I'm using debian-cd to build the installation images: > https://salsa.debian.org/images-team/debian-cd/ Adrian -- .''`. John Paul Adrian Glaubitz : :' : Debian Developer `. `' Physicist `-GPG: 62FF 8A75 84E0 2956 9546 0006 7426 3B37 F5B5 F913
Re: Boot failure with ppc64 port on iMacs G5
John Paul Adrian Glaubitz writes: > Hi Michael, > > On Thu, 2024-02-29 at 17:42 +1100, Michael Ellerman wrote: >> > There seems to be a regression in the kernel which affects PowerPC 970 >> > machines, >> > i.e. PowerMac G5 CPUs. The issue needs to be bisected and reported >> > upstream. >> >> I have a quad G5 that is booting mainline happily. > > it's a really tricky problem because it seems to depend on how the kernel > image > is booted. > > It fails when trying to boot the kernel off the installation CD, i.e. like > from here: > >> https://cdimage.debian.org/cdimage/ports/snapshots/2024-02-25/debian-12.0.0-ppc64-NETINST-1.iso > > but the kernel will boot fine when installing in an existing system which was > installed > with an installation CD which uses an older kernel. > >> https://cdimage.debian.org/cdimage/ports/snapshots/2023-06-18/debian-12.0.0-ppc64-NETINST-1.iso > > I have not really figured out yet what the problem is. OK. That second iso boots OK for me in qemu. It boots grub and then the kernel loads and shows: Loading ... OF stdout device is: /pci@f000/mac-io@c/escc@13000/ch-a@13020 Preparing to boot Linux version 6.3.0-1-powerpc64 (debian-ker...@lists.debian.org) (gcc-12 (Debian 12.3.0-2) 12.3.0, GNU ld (GNU Binutils for Debian) 2.40) #1 SMP Debian 6.3.7-1 (2023-06-12) Detected machine type: 0400 command line: BOOT_IMAGE=/install/vmlinux --- quiet memory layout at init: memory_limit : (16 MB aligned) alloc_bottom : 05e7 alloc_top: 3000 alloc_top_hi : 8000 rmo_top : 3000 ram_top : 8000 copying OF device tree... Building dt strings... Building dt structure... Device tree strings 0x05e8 -> 0x05e80560 Device tree struct 0x05e9 -> 0x05ea Quiescing Open Firmware ... Booting Linux via __start() @ 0x0200 ... Hello World ! smp_core99_probe smp_core99_bringup_done Starting system log daemon: syslogd, klogd. And eventually starts the installer. That's using no VGA, so possibly there's something wrong with the video setup on real hardware: $ qemu-system-ppc64 -nographic -vga none -M mac99,via=pmu -smp 1 -m 2G -nic user -drive file=$HOME/debian-12.0.0-ppc64-NETINST-1.2023-06-18.iso,format=raw,media=cdrom -boot d I'll try and find time to test it on my actual G5 next week when I'm in the office. cheers
Re: Boot failure with ppc64 port on iMacs G5
Hi Michael, On Thu, 2024-02-29 at 17:42 +1100, Michael Ellerman wrote: > > There seems to be a regression in the kernel which affects PowerPC 970 > > machines, > > i.e. PowerMac G5 CPUs. The issue needs to be bisected and reported upstream. > > I have a quad G5 that is booting mainline happily. it's a really tricky problem because it seems to depend on how the kernel image is booted. It fails when trying to boot the kernel off the installation CD, i.e. like from here: > https://cdimage.debian.org/cdimage/ports/snapshots/2024-02-25/debian-12.0.0-ppc64-NETINST-1.iso but the kernel will boot fine when installing in an existing system which was installed with an installation CD which uses an older kernel. > https://cdimage.debian.org/cdimage/ports/snapshots/2023-06-18/debian-12.0.0-ppc64-NETINST-1.iso I have not really figured out yet what the problem is. Adrian -- .''`. John Paul Adrian Glaubitz : :' : Debian Developer `. `' Physicist `-GPG: 62FF 8A75 84E0 2956 9546 0006 7426 3B37 F5B5 F913
Re: Boot failure with ppc64 port on iMacs G5
John Paul Adrian Glaubitz writes: > On Tue, 2024-02-20 at 04:16 +0100, tuxayo wrote: >> I tried snapshots/2024-01-31/debian-12.0.0-ppc64-NETINST-1.iso >> >> And was able to start booting from usb with: >> boot usb0/disk@1:,\boot\grub\powerpc.elf >> (typed in Open Firmware shell) >> (usb0 is the top port) >> >> Grub worked, and then I tried default install (the 1st option) and it >> started loading during like 2 minutes. >> And then it got stuck with some superposition of the messages >> smp_core99_probe >> and >> the stuff before >> DO-QUIESCE finisedBooting Linux via __start() @ 0x0209 ... > > There seems to be a regression in the kernel which affects PowerPC 970 > machines, > i.e. PowerMac G5 CPUs. The issue needs to be bisected and reported upstream. I have a quad G5 that is booting mainline happily. I used to have an iMac G5 but it died. > If you have the time, I would really appreciate if you could test the various > snapshots and let me know which kernel is the first to not work. I expect that > the breakage occurred somewhere around kernel 6.3 or so. Can someone send the .config for the kernel in question? I could try that on my machine here. cheers
Re: Boot failure with ppc64 port on iMacs G5
On 24-02-23 17:35, goberghen wrote: I'm not sure you'll be able to install debian with that cd image. I tried about a week ago on my iMac G5 iSight (ati x600 graphics) model, had to use 2023-05-16 image with kernel options "radeon.agpmode=1 radeon.modeset=1 video=offb:off nomodeset" in grub. Ok so you had the same issue when booting a recent iso, right? smp_core99_probe DO-QUIESCE finisedBooting Linux via __start() @ 0x0209 ... Thanks for the warnings about the next steps. One of my iMacs has an ATI Radeon 9600. I was hopping it would work better than the other one with the nVidia GeForce FX 5200 Ultra. Looking at this: https://wiki.debian.org/PowerPC/FAQ#How_do_I_get_graphics_working.3F you might have hope to get away without nomodeset and thus still having 2D acceleration (I'm not sure if your kernel params leave you with any kind of acceleration) Cheers, -- tuxayo
Re: Boot failure with ppc64 port on iMacs G5
On 24-02-20 10:16, John Paul Adrian Glaubitz wrote: There seems to be a regression in the kernel which affects PowerPC 970 machines, i.e. PowerMac G5 CPUs. The issue needs to be bisected and reported upstream. If you have the time, I would really appreciate if you could test the various snapshots and let me know which kernel is the first to not work. I expect that the breakage occurred somewhere around kernel 6.3 or so. No problem, I'm going there every week and can do as much testing as necessary even if it takes months. We got a donation of a standard PC so we have now one publicly usable PC at the library. So I can take my time to try to make something out of the iMacs. Results: - 2023-06-18: ok - running strings on iso's vmlinuz yields 6.3.7-1 (2023-06-12) - 2023-11-16: fail - 6.5.10-1 (2023-11-03) As expected, the regression happened during the big gap between snapshots >_< Anything more I can test? (cross compiling old kernels is unfortunately too much over my head) It's weird that it seems the regression is about booting the iso. Otherwise, net installs from old iso like what Claudia did wouldn't work after rebooting after install. Cheers, -- tuxayo
Re: Boot failure with ppc64 port on iMacs G5
Hello, On Tue, 2024-02-20 at 04:16 +0100, tuxayo wrote: > I tried snapshots/2024-01-31/debian-12.0.0-ppc64-NETINST-1.iso > > And was able to start booting from usb with: > boot usb0/disk@1:,\boot\grub\powerpc.elf > (typed in Open Firmware shell) > (usb0 is the top port) > > Grub worked, and then I tried default install (the 1st option) and it > started loading during like 2 minutes. > And then it got stuck with some superposition of the messages > smp_core99_probe > and > the stuff before > DO-QUIESCE finisedBooting Linux via __start() @ 0x0209 ... There seems to be a regression in the kernel which affects PowerPC 970 machines, i.e. PowerMac G5 CPUs. The issue needs to be bisected and reported upstream. If you have the time, I would really appreciate if you could test the various snapshots and let me know which kernel is the first to not work. I expect that the breakage occurred somewhere around kernel 6.3 or so. CC'ing Claudia Neumann who observed this bug before and can maybe share some additional information. > Full message of the two iMacs G5 ↓↓↓ > https://transfert.facil.services/r/Ksfq_2VM9_#tDATBcLXzB0zkAEaiqm9gfLfsaXliVJ13rQxKUHgUmA= > https://transfert.facil.services/r/Zs1h1jEtb2#jufjxv6+1DfHnO3TSfhmYD+teOvY46sGClHyz7SiXd4= Adrian -- .''`. John Paul Adrian Glaubitz : :' : Debian Developer `. `' Physicist `-GPG: 62FF 8A75 84E0 2956 9546 0006 7426 3B37 F5B5 F913
