Bug 117683

Summary:	boot.idedma: device /dev/hdg for CD-ROM is not found
Product:	[openSUSE] SUSE Linux 10.1	Reporter:	Ulrich Derenthal <uli.2001>
Component:	Basesystem	Assignee:	Ladislav Slezák <lslezak>
Status:	RESOLVED FIXED	QA Contact:	E-mail List <qa-bugs>
Severity:	Normal
Priority:	P5 - None	CC:	hare
Version:	Alpha 1
Target Milestone:	Alpha 2
Hardware:	x86
OS:	All
Whiteboard:
Found By:	Beta-NTS	Services Priority:
Business Priority:		Blocker:	---
Marketing QA Status:	---	IT Deployment:	---

Description Ulrich Derenthal 2005-09-18 15:22:15 UTC

My CD-ROM drive is /dev/hdg. The YaST module for the IDE DMA mode configuration
allows me to specify an appropriate DMA mode.

However, on startup, boot.idedma fails because /dev/hdg is not found. However
after startup, /dev/hdg exists. This is strange.

Comment 1 Christian Zoz 2005-09-27 11:14:43 UTC

Ladislav, we cannot guarantee that all devices are present at a certain time
when booting. Device initialisaton is an assynchronous process that happens in
backround. And further there might be devices which will be plugged at runtime.

Can you please change the script that way, that it just works on one single
device given on command line (check if device is in DEVICES_FORCE_IDE_DMA and
skip if not). Then we can call that scripts via an udev rule and remove it from
/etc/init.d. Call it /sbin/udev.idedma.sh.

Comment 3 Christian Zoz 2005-09-27 14:24:33 UTC

You can leave the echo commands in.

If you set 
  /etc/udev/udev.conf:udev_log=info
and restart udev or call
  udevcontrol log_priority=6
then you will see all output in syslog.

To generate a hotplug event for ide devices you may manually (un)bind devices in
sysfs. E.g. in /sys/bus/ide/drivers/ide-cdrom/ there is a link to the cdrom
device. Take that name and 'echo -n' it to (un)bind.
  echo -n 1.0 > /sys/bus/ide/drivers/ide-cdrom/unbind
  echo -n 1.0 > /sys/bus/ide/drivers/ide-cdrom/bind
You can use show_event_log from /usr/share/doc/packages/udev/ to extract the
mesages for certain events from syslog. Use a fresh /var/log/messages for that.
show_event_log <sequence number of first event> [<seq.num. of last or "last">]
See README.Logging.

Read about udev rules in man udev. You will need something like 
  KERNEL=="hd*[!0-9]", RUN+="/sbin/udev.idedma.sh"
If you don't specify arguments to your script it will be called with the device
(kernel) name as single argument.

Comment 4 Ladislav Slezák 2005-10-06 14:35:45 UTC

Ruediger, please add the script (sent via mail) into aaa_base package. Then
reassign the bug back to me and I will adapt the yast module.

Comment 5 Ruediger Oertel 2005-10-12 16:40:19 UTC

added script to hdparm package (and removed leftovers from aaa_base) 
 
setting product to 10.1 
 
reassigning

Comment 6 Ladislav Slezák 2005-10-13 08:41:53 UTC

The yast module has been adapted (fixed in yast2-tune-2.13.1)