[mythtv-users] Missing video Devices???
linux.luser at myrealbox.com
Thu Jan 4 12:46:31 UTC 2007
On 4 Jan 2007, at 12:00, A JM wrote:
>> These would indeed need reinstallation after a kernel upgrade because
>> they would be kernel driver modules, and driver modules need to be
>> compiled against a specific version of the kernel.
> I'm following you that they are KERNEL dependent. Why did they get
> un-installed? I know that is an open ended question but did the KERNEL
> update do that? I didn't specifically remove them so something removed
I'm not familiar with your package manager, so I don't know about that.
> The following shows no signs of the ivtv drivers...
> [root at myth2 mythtv]# /sbin/lsmod |grep "ivtv"
> [root at myth2 mythtv]# rpm -qa |grep "ivtv"
> [root at myth2 mythtv]# /sbin/modprobe ivtv
> FATAL: Module ivtv not found.
> [root at myth2 mythtv]#
What does `find /lib/modules/ --iname "ivtv*"`say?
(without the ` quotes, but with the " ones)
> Is changing between KERNELS after it's installed as easy as selecting
> the correct KERNEL at Boot up with GRUB? I assume that you would also
> then need to have the correct drivers for whichever KERNEL your using,
You're hitting the nail right on the head here... changing between
kernels is as easy as selecting the right kernel in Grub (you can
also edit /boot/grub/grub.conf by hand to change the default) but
drivers won't work unless they're compatible with the new version.
I think that occasionally drivers compiled for an old version of the
kernel will load in a newer one - showing an error in `dmesg` but
loading anyway - but usually only if the kernel version has changed
little (ie: not more than one point release). But I think you should
consider this the exception rather than the rule.
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