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Postings by fred smith

USB audio on Centos-7

I'm using Centos-7 on my PC, with ASUS motherboard. internal audio
has always worked fine EXCEPT that I can never get audio input (for
recording) to work. I want to feed audio from a phono turntable and
from a cassette deck.

installing lxqt on CentOS-7

I see that epel has a bunch of lxqt packages,, but there doesn't seem
to be a lxqt group.

if I try to install lxqt-* it of course wants to install a whole shipload
of stuff alongside it.

does anyone here happen to know the correct incantation for getting lxqt
onto a C7 system without unnecessary crap?

thanks in advance!

Fredex

anybody else had this problem since the CR updates?

I'm running Mate on my C7 boxen, a desktop and a netbook.\

Mate comes from epel, so it's probably not a CentOS problem, but lemme
ask here in case anybody else has seen it:

some tools (nm, pavucontrol, and possibly others I haven't noted down)
no longer have the correct formatting on screen. there are no backgrounds,
i.e., backgrounds that define areas of the screen by shading or borders.
clickable text tends to be jammed together.

more questions on setting up autofs on C7

Hi!

Thanks to some of you I got autofs set up on my C7 netbook for
mounting local cifs filesytems.

Now I want to do something on my C7 desktop machine, that seems to
me to be a little different, and I"m not sure how to do it.

I have an external RAID1 box that attaches via USB.

what is CodeMeter and why is it running on my CentOS box?

I just stumbled over /var/log/CodeMeter, which contains a number of large
log files.

I know I'm getting old and forgetful, but I can't remember intentionally
installing that package.

Yum just says "installed" instead of listing a repo.

Looking at codemeter.com, it seems to work with something called a
"cm stick". I don't have one, don't want one, and never heard of them.

Is there any reason I should be leery of just "yum remove"ing the
package?

thanks!

Fred

Kernel:[Hardware Error]:

I had a series of kernel hardware error reports today while I was away
from my computer:

Message from syslogd@fcshome at Aug 12 10:12:24 ...
kernel:[Hardware Error]: MC2 Error: VB Data ECC or parity error.

Message from syslogd@fcshome at Aug 12 10:12:24 ...
kernel:[Hardware Error]: Error Status: Corrected error, no action required.

Message from syslogd@fcshome at Aug 12 10:12:24 ...
kernel:[Hardware Error]: CPU:2 (15:2:0) MC2_STATUS[-|CE|MiscV|-|-|-|-|CECC]: 0x98444000010c0176

Message from syslogd@fcshome at Aug 12 10:12:24 ...
kernel:[Hardware Error]: cache level: L2, tx: DATA, mem-t

Using GIMP on Centos-7, problem

Wondering if anyone here has ever tried installing this

<a href="https://github.com/bootchk/resynthesizer" title="https://github.com/bootchk/resynthesizer">https://github.com/bootchk/resynthesizer</a>

as a gimp plugin in Centos-7, with gimp 2.8.16??

I find the installation instructions (for the binary tarball) are
minimal and whatever I do, it doesn't seem to appear in the gimp
menus, as it should.

I've used an older version (0.14) from years ago in older versions
of gimp, but how does one make this newer one work on C7?

I also tried building the source, but even "autoconfig" spewed some
errors that are greek to me, so I, for the moment, gave up on that.

Advice will be appreciated, thanks

I found this interesting: amount of evil traffic on the internet

I've just done a little "study" (well, nothing quite that pretentious)
of the traffic hitting my router, that gets DROPped the router's
firewall. there is a surprisingly (to me, at least) enormous amount of
it. over about the last 3 weeks, it has dropped over 65,000 connection
attempts.

I finally got around to figuring out how to have the router's logging
mechanism connect to the rsyslog on my Centos workstation, so I can
collect a large body of log entries to review.

looking for graphing tools

Hi!

I have bazillions of incoming (rejected) attempts to connect to my
SMTP server, and I'm interested in separating out those that seem
to come in huge bunches (e.g., the one from yesterday that ran for
about 10 hours and sent over 4100 attempts), and graphing them so
I can see the spacing and/or distribution in time.

I can figure out some simple scripting to turn the maillog entries
into times since the epoch, or other formats, if needed, but I have
no experience with the various graphing tools availabe, or even
what (or where) they are.

I'd appreciate pointers-and-or-advice, should any o

using autofs on C-7

Hi all!

I'm trying to set up autofs on my C7 netbook so I can automount a cifs
share (actually two) from my NAS box, and because when I'm not at home
I don't want it attempting to mount it.

so I've read several howtos on it, including the one on the CentOS Wiki.
but what I've got isn't working right, and I don't know why.

I'm trying to follow the "even-better method", but am finding I don't
understand the syntax of entries, so I'm flailing around trying different
things.

so, here's what I have now:

in /etc/auto.master:

/mnt/syno-fredex /etc/auto.syno-fredex

I added /etc/auto.syno-fredex

plymouth themes problem

Hi all!

I was playing with plymouth themes on a c7 box. I found a page on
redhat, in their rhel7 documentation that describes how to change to
a different plymouth screen:

plymouth-set-default-theme --list
to find out what themes are installed.

then I installed the remaining bunch the yum had available.

so then installing one by doing

plymouth-set-default-theme <theme name>
dracut -f

as documented on the aforementioned page, followed by a reboot
produces NO plymouth splash screen.

nameserver issue

Hi all!

This question is, at best, somewhat peripheral to Centos, but I'm
hoping to be forgiven, and that someone here can give me a clue.

I've just brought up a nameserver on my household LAN, bind9 on a
Raspberry Pi.

The connection with Centos is this: my main desktop is C7, and its
hardwired network is also manual, not dhcp. I've edited the ipv4 config
(in NM) and changed the DNS settings from 192.168.2.1 (the router) to
192.168.2.2 (the RPi). I've also manually tweaked /etc/resolv.conf
to contain 192.168.2.2 instead of 192.168.2.1.

works fine. until I fire up a vpn.

SYSCALL problem in C7

Hi all!

I know this isn't a devel list, but thought someone here may have a clue
I could use...

I have a fairly big application that runs on Centos 7 (and 6 and 5).

Sometimes (not often, but too often) when running under the ddd debugger,
while sitting stopped at a breakpoint, it will suddenly spew an apparent
segfault in, as it says at the top of the source file, "Assembly code
template for system call stubs".

The specific place always looks like this:

T_PSUEDO (SYSCALL_SYMBOL, SYSCALL_NAME, SYSCALL_NARGS)
ret_ERRVAL
T_PSEUDO_END_ERRVAL (SYSCALL_SYMBOL)

the red error marker points to S

frozen bubble for C7

Hi all!

I'm looking for a frozen-bubble that works on C7.

I've tried installing the one in the Nux C7 archive, and the
installation dies with:

Error: Package: frozen-bubble-2.2.1-0.10.beta1.el7.nux.x86_64 (nux-dextop)
Requires: perl(Compress::Bzip2)

Can't find perl(compress::bzip2) anywhere.

thansk in advance!

Fred

another SMTP auth question

My ISP has just informed me that we will soon be required to authenticate
when connecting to their smtp server, so I've been looking around on the
web for how to do that with sendmail (just using auth when connecting
outward-bound, nothing else).

I've found a page here: <a href="http://www.sendmail.org/~ca/email/auth.html" title="http://www.sendmail.org/~ca/email/auth.html">http://www.sendmail.org/~ca/email/auth.html</a>
that explains it simply (for simple minds, like mine) but it appears
to be old-ish.

So, I'm wondering if the recommendation of using:

define(`confAUTH_MECHANISMS', `EXTERNAL GSSAPI DIGEST-MD5 CRAM-MD5 LOGIN PLAIN')dnl

is still appropriate, since MD5 is known to be breakable.

mdadm vs raidcheck

Hi all!

I don't religiously follow everything that pops up in the selinux
alerts, but now and then I go back and look at some of them.
(I'm on an up to date Centos-7).

Today I noted an error that seems to occur during a weekly raid check,
from /etc/cron.d.

the selinux alert is:

SELinux is preventing /usr/sbin/mdadm from write access on the file /var/log/rear/rear-fcshome.log.lockless.

so I go look at that file and find that it contains, down in the middle
of commands run, a series of errors:

2017-02-19 01:30:03 Relax-and-Recover 1.17.2 / Git
2017-02-19 01:30:03 Command line options: /u

firefox/flash/CNN issue in Centos-7

Hi all!

I have 3 up to date C7 systems.

One of them has flash installed, the other two do not.

One of the two without flash displays CNN videos fine. I'm not sure
whether it is using html5/canvas, or some other mechanism.

the other system without flash fails to display them because flash
is missing.

So far I have not been able to figure out what is different in the
two systems' firefox configuration.

networkmanager VS OpenConnect VPN

I have a VPN connection using the openconnect vpn, and it is managed by network manager. Works fine.

It has been on my system since the original Centos 7.x release.

Now that I have Centos 7.3, while it still works fine, I find that
I can no longer add a new connection using openconnect.

7.3 and USB headphones

Hi all!

I wish to give huge thankyous to KB and all the others who worked
to get 7.3 out the door. Many thanks!

I have some good things and some bad. A good thing is that unlike
previous versions, when I plug in my USB headphones they are automatically
recognized and I get sound without having to change anything! (which is
a huge win from before when I had to mess with settings, sometimes for
a few minutes, to get headphone sound and microphone audio.)

The not so good thing is that I don't have any working volume
control for that sound.

odd sendmail question

I've looked thru all the stuff at sendmail.org (or whatever its name
is now, they seem to have gone corporate...) and don't see anything
relating to this:

I get a series of log entries in /var/log/maillog, once or twice a day
at various times--not 12 or 24 hours apart. not always the identical
series either.

Sound problem, possibly Mate Volume Control

Hi all!

In the last day or two (on Centos 7)the speaker icon in the Mate top
panel, which normally drops down to a volume control, has stopped working.

what does "stopped working" mean?

It means when I drop down the volume slider and slide it, it makes no
difference at all in the output volume.

if I right-click that icon, it'll open up "Sound Preferences", which
appears to be the same as "Mate Volume Control".

hacking grub to control number of retained kernels.

I've recently had this problem on two C7 systems, wherein when doing "yum
update", I get a warning about /boot being low on space.

both systems were installed using the partition size recommended by
Anaconda, right now "df -h" shows /boot as 494M, with 79M free.

I don't store unrelated crap on /boot, I assume that yum and/or grub
will manage it for me.

netbook screen suddenly goes black

Hi all!

I'm running an up to date Centos-7 on my Acer Aspire One netbook. have
been for, well, ever since C7 was released.

Just had an event today that also happened 2 or 3 times with earlier
systems installed, but I never pursued it.

What happens is that suddenly while working away on the desktop the
display suddenly goes black... not black as in turned off, I can see
that the backlight is still on, but no image is displayed.

Nothing I can do fixes it except a reboot. I've tried CTRL-ALT-BKSP,
CTRL-ALT-DEL, alt+printscreen+r+e+i+s+u+b.

enlarging partition and its filesystem

Hi all!

I've got a VM at work running C6 on HyperV (no, its not my fault,
that's what the company uses. I'd rather gag myself than own one
of th ose things.)

I ran out of disk space in the VM, so the admin enlarged the virtual disk.
but now I realize I don't know how to enlarge the partition and its
filesystem.

I'll be googling, but in case I miss it, it'd be great if someone could
point me in the right direction.

thanks!

Fred

Sound input on C7

Hi all!

I've just spent a frustrating hour trying to get audio to come out
of the speakers, where the input is via a cable from the headphone
jack of my Sansa Sandisk player.

I'm usin the Mate desktop (yes, I know, centos doesn't support it, so
this may more properly be a question for EPEL...) and the Mate Volume
control Applet.

I've got it configured to use the front panel mic input (perhaps I
need the line input on the back panel??) but I can't find any combination
of settings that sends the audio out my speakers.

for input I've chosen "Built-in Audio Analog Stereo), and as music plays
o

firewalld question

Hi all!

I'n wondering if it is possible to have Centos-7 automatically change
firewall zones, depending on the network we conect to.

my default zone is "home" and it has some ports open that probably
shouldn't be open when I'm on someone elose's network.

so I'm thinking that if there's a way to have it always use home when
I'm at home, and external when I'm not, it would be great.

I see that firewall-cmd has a ton of options, but not sure which one(s)
I'd need for switching.

Openshot 2.x (beta) on C7??

I'm interested in trying out the new OpenShot beta (2.06) on CentOS 7.
Openshot requires Python3.

so I look at available packages where I find a bunchof python3 packages
as well as python34 packages.

I'm assuming that python34 is version 3.4 of python, while python3 is some
other 3.x version.

Can anyone here explain to me what are the differences, any compatibility
across these versions, and how to tell which I need for OpenShot?

Thanks in adva ce!

Fred

Balsa problem

Wondering if anyone here has built Balsa for Centos-7.

I've used it on Centos 5 and 6 for years, though I had to compile
it myself.

It compiles cleanly on c7, but when run I keep getting error messages
that say "Failure to sync mailbox xxxx" that seem to happen when I try
to view a mailbox that has new/unread mail, or perhaps it happens when
a mailbox receives new mail whilei Balsa is open, not certain which.

I can't find anything in the Balsa mailing list(s) that helps, and
Google isn't my friend in searching for any help on this.

Anybody got any thoughts?

MATE question

I know I should go to EPEL with this, but thought to ask here in case
anyone else uses Mate and may know more about it than I do.

I had installed the MATE 1.12 packages from epel testing a few days ago,
but since that did not include some of the devel packages, I just removed
it and reinstalled all the MATE 1.10 packages from epel-7.

they all installed fine, but now my desktop has a background, and top
and bottom panels and nothing else. right-click on the desktop produces
no context menu.

Anyone know what I've missed (or messed) ?

thanks!

what browser plugin provides Quicktime on 7.2?

Several of the plugins I used on C6 no longer seem to be available,
so I can't figure out what to use for Quicktime (apple.com/trailers).

Advice appreciated!

Fred