Freeze with CAM (using KsCD)
olivier.certner at free.fr
Tue Jan 4 07:43:39 PST 2005
I'm getting a problem when using KsCD, the KDE CD player, and the SCSI
emulation for ATAPI devices within the kernel.
A couple of minutes after having logged in with kdm, which launches a KDE
session with a KsCD iconified, the whole machine freezes: apparently no more
display update, impossible to move the pointer, etc. Pressing keys on the
keyboard continues to work, but at a very low rate, ie if I do a CTRL+ALT+Fn
to switch to console mode, I have to wait for 5 minutes... Then I'm sometimes
able to login (sometimes keys are ignored), which means the kernel is still
Here are the logged messages I get every time the problem occurs:
kernel: atapicam0: timeout sending command=a0
kernel: atapicam0: error issuing ATAPI packet command
...repeated lots of times...
kernel: scsi_cd: error in readtocentries, returning EINVAL
The only way I've found to avoid that is to deactivate KsCD in KDE. Despite
that, I'm not totally sure if the problem is really trigerred by KsCD, since
no precise visible operation seems to trigger it instantaneously.
I use CAM in order to be able to burn CDs/DVDs, so I have compiled support
for atapicam, among others, as these lines in my kernel conf file states:
device atadisk # ATA disk drives
device atapicam # emulate ATAPI devices as SCSI ditto via CAM
# needs CAM to be present (scbus & pass)
options ATA_STATIC_ID # Static device numbering
device scbus # SCSI bus (required for SCSI)
device cd # CD
device pass # Passthrough device (direct SCSI access)
There is no support for SCSI's hard disk since I just want to use my CD/DVD
units through the emulation.
I'm using FreeBSD 5.3-RELEASE for the kernel source (as well as for the KDE
Does anybody have heard something about that? It seems to me it is a bug but
I would like some advices before submitting it.
Thanks in advance for your answers. Regards,
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