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Debian on Sparc
This page is supposed to help in tracking various Sparc-related issues, including current critical bugs (with relevant links and work arounds), installer issues and the like.
Installation notes for various machines and methods: SparcInstallationNotes
Running Sarge on sun4c machines: ?SparcSun4c
Updating OpenBoot PROM: ["SparcUpdateOBP"]
Tracking the porting progress: SparcPorting
Tips and tricks for running X (X.org) on Sparc: XorgOnSparc
Packages currently supporting only 64-bit Sparcs: Sparc64Only
Current open problems for the port:
SILO/kernel hang
There is a bug either in kernel or SILO, which, when tripped, prevents the machines from booting. Symptoms: kernel hangs or machine returns to the PROM 'ok' prompt immediately after messages Remapping the kernel... FP Disabled. There is an old RC bug [http://bugs.debian.org/267428 #267428]. Common workarounds are to use older version of SILO (1.2.5 version from woody), or to build the new SILO with gcc-2.95 instead of the current compiler. This does not, however, eliminate the problem in all cases, as demonstrated in [http://lists.debian.org/debian-sparc/2005/01/msg00000.html this message]. The message about remapping the kernel really comes from the kernel, so it might be a kernel problem after all.
One possible reason for that is that the floating-point instruction is encountered somewhere in the execution path of the inherit_prom_mappings() function. I have [http://lists.debian.org/debian-sparc/2005/01/msg00026.html asked ] for more debugging information.
Support for sun4c machines, see also SparcSun4c
The sun4c architecture lacks a couple of important instructions (unsigned multiply and unsigned divide are probably the most important) so if everything is compiled for sun4c machines (gcc -v7) it's a major performance hit on newer platforms. Support was begun to be phased out in woody (3.0). This post http://lists.debian.org/debian-sparc/2005/01/msg00152.html is a good summary of the issues / status.
Support for UPA graphics cards on ultrasparc machines with onboard graphics
Some ultrasparc machines (eg. Ultra 10) have both onboard graphics and a UPA slot which can hold a graphics card (eg. Creator 3D). The default debian kernel/initrd contains all the graphics drivers which are in the linux kernel. This may result in the prom using a different graphics card for the console then the linux kernel. Worse, the graphics card chosen by linux for the console display may not have been initialized by the prom, which may cause the card to output a wrong video signal or no video signal at all. A workaround for this problem is to disable the onboard graphics in the prom if an UPA graphics card is installed. This can be done as follows :
1) Enter the prom (eg. by pressing stop-A)
2) Enter the following commands at the ok prompt :
ok nvedit
0: probe-all install-console banner 1: " /pci@1f,0/pci@1,1/SUNW,m64B@2" $delete-device drop 2: ^C (Type control-C)
ok nvstore
ok setenv use-nvramrc? true
use-nvramrc? = true
ok reset-all
3) Note that there might be 'devalias ...' lines in the nvramrc already. Just keep them in by pressing enter.