Datasheet

“main” (Installation and Administration) — 2004/6/25 — 13:29 — page 346 — #372

image = /boot/vmlinuz

label = road

root = /dev/hda6

initrd = /boot/initrd

append = "vga=0x317 hde=ide-scsi PROFILE=road"

16.2.8 Troubleshooting

In most cases, SCPM should function smoothly. There are, however, some

pitfalls, which are described here.

SCPM is currently not able to survive a system update. The difﬁculty lies

in the fact that, with a system update, the data stored in the proﬁles is

not cleanly updated by the automatic mechanisms. SCPM then detects a

system update and refuses to work. In this situation, you should get an

error message from SCPM that says "your operating system installation

changed/is unknown, read man page!" In this case, reinitialize SCPM with

scpm -f enbale. Your proﬁles, however, will be lost and you must re-

conﬁgure them.

It can also sometimes occur that SCPM stops working during a switch pro-

cedure. This may be caused by some outside effect, such as a user abort, a

power fault, another similar problem, or even an error in SCPM itself. In

this case, an error message saying SCPM is locked appears the next time

you start SCPM. This is for system safety, because the data stored in its

database may differ from the state of the system. To solve this issue, delete

the lock ﬁle with rm /var/lib/scpm/#LOCK then update your database

with scpm -s reload. After this procedure, proceed as usual.

There is no real problem with changing the resource group conﬁguration

of an already initialized SCPM. However, you must run scpm rebuild

after adding or deleting groups. This adds new resources to all proﬁles and

removes the deleted ones. The deleted ones are then lost to the system. If

there are different conﬁgurations for the same resource in different proﬁles,

the deletion of resources might cause serious problems. The current proﬁle,

which is not touched by SCPM, will not be affected. If you reconﬁgure your

system with YaST, the rebuild is handled by YaST.

16.3 IrDA — Infrared Data Association

IrDA (Infrared Data Association) is an industry standard for wireless com-

munication with infrared light. Many laptops sold today are equipped with

346 16.3. IrDA — Infrared Data Association