Guys,
FYI.
-------- Original Message --------
Subject: Re: kern/106432: Record of disks (DVD-R) through the k3b
program leads to lag of system
Date: Fri, 12 Jan 2007 19:57:06 +0200
From: Andriy Gapon <[EMAIL PROTECTED]>
To: [EMAIL PROTECTED], [EMAIL PROTECTED], [EMAIL PROTECTED]
I would like to followup on the portion of this PR that says that k3b
shows incorrect speed list in its "Speed" drop-down for DVD media.
I have this problem as well and I think that I found a reason. The
following lines from k3b debug output raised my suspicion:
k3b: (K3bDevice::openDevice) open device /dev/pass0 succeeded.
k3b: (K3bDevice::ScsiCommand) transport command ac, length: 12
k3b: (K3bDevice::openDevice) open device /dev/pass0 succeeded.
k3b: (K3bDevice::ScsiCommand) transport command ac, length: 10
k3b: (K3bDevice::Device) /dev/cd0: Number of supported write speeds via
GET PERFORMANCE: 7
k3b: (K3bDevice::Device) /dev/cd0 : 13854 KB/s
k3b: (K3bDevice::Device) /dev/cd0 Invalid DVD speed: 0 KB/s
k3b: (K3bDevice::Device) /dev/cd0 Invalid DVD speed: 0 KB/s
k3b: (K3bDevice::Device) /dev/cd0 Invalid DVD speed: 0 KB/s
k3b: (K3bDevice::Device) /dev/cd0 Invalid DVD speed: 0 KB/s
k3b: (K3bDevice::Device) /dev/cd0 Invalid DVD speed: 0 KB/s
k3b: (K3bDevice::Device) /dev/cd0 Invalid DVD speed: 0 KB/s
It seems that the second 0xAC (GET PERFORMANCE) command was sent as
10-byte command instead of correct 12-byte command. I've checked the
sources of k3b and dvd+rw-mediainfo and they both send two 0xAC commands
, first one is to query number of writing profiles and the second one is
to actually get them. Only dvd+rw-mediainfo does it correctly and k3b
does it incorrectly.
The problem is in libk3bdevice/k3bdevice_mmc.cpp file, method
K3bDevice::Device::getPerformance(): the code assumes that some bytes in
cmd[] will survive the first execution and so they do not need to be set
again. This might be an incorrect assumption. So I changed the
corresponding lines so that they look like follows:
[[[[]]]]
int numDesc = (dataLen-8)/16;
cmd[0] = MMC_GET_PERFORMANCE;
cmd[1] = dataType;
cmd[2] = lba >> 24;
cmd[3] = lba >> 16;
cmd[4] = lba >> 8;
cmd[5] = lba;
cmd[8] = numDesc>>8;
cmd[9] = numDesc;
cmd[10] = type;
cmd[11] = 0; // Necessary to set the proper command length
[[[[]]]]
Now everything is correct:
k3b: (K3bDevice::openDevice) open device /dev/pass0 succeeded.
k3b: (K3bDevice::ScsiCommand) transport command ac, length: 12
k3b: (K3bDevice::openDevice) open device /dev/pass0 succeeded.
k3b: (K3bDevice::ScsiCommand) transport command ac, length: 12
k3b: (K3bDevice::Device) /dev/cd0: Number of supported write speeds via
GET PERFORMANCE: 7
k3b: (K3bDevice::Device) /dev/cd0 : 22161 KB/s
k3b: (K3bDevice::Device) /dev/cd0 : 22160 KB/s
k3b: (K3bDevice::Device) /dev/cd0 : 16621 KB/s
k3b: (K3bDevice::Device) /dev/cd0 : 16620 KB/s
k3b: (K3bDevice::Device) /dev/cd0 : 11081 KB/s
k3b: (K3bDevice::Device) /dev/cd0 : 11080 KB/s
k3b: (K3bDevice::Device) /dev/cd0 : 5540 KB/s
And I see the correct list in GUI drop-down too.
Before that I had to always set DVD writing speed to "Ignore", so that
k3b wouldn't try to force some unnatural speed on my DVD drive.
--
Andriy Gapon
--
Andriy Gapon
_______________________________________________
freebsd-ports@freebsd.org mailing list
http://lists.freebsd.org/mailman/listinfo/freebsd-ports
To unsubscribe, send any mail to "[EMAIL PROTECTED]"
