On 11/01/15 21:50, John Pilkington wrote:
Hi: This is a followup of my post of a month ago,
http://comments.gmane.org/gmane.linux.scientific.user/7532
in which I reported that after an SL7 kernel upgrade my tv-reception
hardware was no longer working. At that time it would still work under
older kernels.
Things have got worse; now the old kernels don't work either.
Both devices need kernel modules and firmware. Both firmware files are
still in /lib/firmware but only one is being loaded.
The immediate causes, read from dmesg, appear to be
DVB: Unable to find symbol tda10046_attach()
DVB: Unable to find symbol it913x_fe_attach()
although these symbols (or very close) *are* present
$ modprobe -c | grep tda1004
alias symbol:tda10046_attach tda1004x
$ modprobe -c | grep it913
alias symbol:it913x_fe_attach it913x_fe
If I use /etc/modprobe.d to add aliases with the missing brackets,
modprobe -c shows them as present, but module loading still fails:-
$ systemctl | grep module
sys-module-configfs.device loaded active plugged /sys/module/configfs
rhel-loadmodules.service loaded active exited Load legacy module
configuration
systemd-modulesload.service loaded failed failed Load Kernel Modules
$ systemctl status systemd-modules-load.service
systemd-modules-load.service - Load Kernel Modules
Loaded: loaded
(/usr/lib/systemd/system/systemd-modules-load.service; static)
Active: failed (Result: exit-code) since Sun 2015-01-11 20:14:51
GMT; 1h 22min ago
start condition failed at Sun 2015-01-11 20:14:57 GMT; 1h
22min ago
*************** none of the trigger conditions were met **************
Docs: man:systemd-modules-load.service(8)
man:modules-load.d(5)
Main PID: 95 (code=exited, status=1/FAILURE)
(My emphasis of the 'helpful' error message)
I believe that the *rhel-loadmodules.service* might be part of the real
cause. For some time I have been seeing, very early in the boot
process, lines flashing onto the screen and disappearing, that must have
had their origin in faulty long-deleted trial versions (legacy?) of
/etc/modprobe.d
I have tried 'systemctl disable rhel-loadmodules.service', but systemctl
still shows it as active and the problems, related or not, still persist.
It looks to me as if this isn't just a niche problem; I'd like to see
it solved.
I have posted on mythtv-users without much response, and on linux-media
with none, but that was before I came across this 'legacy config'
aspect, which seems more systemd related.
John Pilkington
after running, as root,
modprobe -r saa7134_dvb
modprobe -r dvb-usb-af9035
modprobe saa7134_dvb
modprobe dvb-usb-af9035
and sometimes repeated insertion of the usb device I now see
[john@HP_Box ~]$ dmesg | grep 'registering adapter'
[ 197.164048] saa7134 0000:07:04.0: DVB: registering adapter 0 frontend
0 (Philips TDA10046H DVB-T)...
[ 496.136567] usb 2-2: DVB: registering adapter 1 frontend 0 (Kworld
UB499-2T T09(IT9137)_1)...
[ 496.781191] usb 2-2: DVB: registering adapter 2 frontend 0 (Kworld
UB499-2T T09(IT9137)_2)...
[john@HP_Box ~]$ uname -a
Linux HP_Box 3.10.0-123.13.2.el7.x86_64 #1 SMP Thu Dec 18 02:09:51 CST
2014 x86_64 x86_64 x86_64 GNU/Linux
and things then seem to be working as expected. But it used to boot and
work without intervention, and I'm still seeing the 'missing symbol'
warnings early in the boot sequence.
Oh, and in case it's relevant, I now have
[john@HP_Box ~]$ cat /etc/modprobe.d/dvb.conf
alias symbol:tda10046_attach() tda1004x
alias symbol:it913x_fe_attach() it913x_fe
[john@HP_Box ~]$
John
