Postings by fred smith

off-topic question about RDP to Win-10

I have a win10 VM in virtualbox on my Linux (C7) desktop. I CAN connect
to it with rdesktop 1.8.3 (now rather old, but it's the latest release),
but cannot connect with remmina or krdc. Both of them just hang for a
while then say they can't connect.

Curiously, they all will connect to the win10 box in my office.

They don't show any other useful information, and I don't know where
to go to figure this out. Anyone out there have any ideas they can share?

thanks in advance!


touchpad problem

Hi all!

I have a new-to-me (i.e., used) laptop and am having a problem making
the touchpad behave.

It is an old HP Elitebook 8530p, and I THINK it has a synaptics
touchpad. But I don't remember how to get more specifics than that
on Linux, lspci, lsusb and lshw don't tell me anything helpful.
lsmod doesn't list anything containing "syn" or "synaptics".

Anyway, I've installed C7 on the laptop and pretty much everything
works just as I expect it to, but even though I configure the touchpad
for two-finger-scrolling, it simply won't do it.

last failed login...

Hi all!

I just (well, a few days ago) installed C7 on a new-to-me (used) laptop,
and notice something I've not noticed before, either on my personal
desktop, or other C7 machines I use:

every time I log in, it gives me a message something like "last failed
login <timestamp>", where the date and time it gives are RIGHT NOW, just
at the time I'm logging in (which succeeds).

Anybody know why that would be happening?

BTW, using the Mate desktop, but did not change the DM, so I think
it is still GDM.

Thanks in advance!


fingerprint reader on C-7 ???

Hi all!

I just got a new (to me) used laptop (HP EliteBook 8530p) and find that
it has a fingerprint reader.

Wondering if it could be made to work for me (Centos-7) I did a lot
of googling (well, actually duck-duck-go-ing) and found a ton of hits
on either setting it up in Windoze, or others wondering if it can be
used in Linux.

Screensavers on Centos-7

Hi all!

I keep having problems with screensaver(s) on Centos-7.

I have in the past liked Xscreensaver, so I've installed it and tried
to suppress whatever other screensaver is on the system. Xscreensaver
works fine for a day or 20 then quits working. After a lengthy battle
I gave up and removed it.

I'm now trying mate-screensaver, which does the same thing!

when I say "quits working" I mean just that. one night it goes to a
black screen (as configured) then a minute or two later the power manager
shuts off the screen.

odd popups

Occasionally and without any action on my part, I get a popup
saying I need to authenticate in order to read others' actions.
I have no clue what this is for, so I always reject them.
Anyone got a clue?

Image attached.

Yum dependency failure installing latest LibreOffice

I've been bashing my head on the wall for 2 or 3 hours for something that
should be (and has been, in the past) simple.

Trying to install the latest LibreOffice downloaded from
I had and downloaded, and kept getting dependency errors:

--> Running transaction check
---> Package libobasis6.0-base.x86_64 0: will be installed
---> Package libobasis6.0-calc.x86_64 0: will be installed
---> Package libobasis6.0-core.x86_64 0: will be installed
--> Processing Dependency: libreoffice6.0-ure <= for package: libobasis6.0-core-6.0.4.

Yum list installed lies to me

when I do "yum list installed" I get a lot of stuff, including this excerpt:

wqy-zenhei-fonts.noarch 0.9.46-11.el7 @anaconda
wvdial.x86_64 1.61-9.el7 @anaconda
wxBase.x86_64 2.8.12-20.el7 @epel
wxBase3.x86_64 3.0.2-15.el7 @epel
wxGTK.x86_64 2.8.12-20.el7 @epel

using Skype on C-7


I've whined about this before, but now I feel the overwhelming urge
to whine some more. Forgiveness begged... :)

I've spent some very frustrating times trying to get a microphone
to work when doing skype calls.

According to the various sound tools available on Centos all the various
mics I have (built into webcam, analog headset, USB headset)produce
sound just fine.

but when using skype there are too many different knobs one can turn
to actually make it work.

dmarc auth on incoming email

Just reading up on DMARC, toying with setting it up to auth against
incoming emails. (but not configure my domain to use dmarc, or at least
not yet)

ran into an article about opendmarc, which is available on epel. but
when I took a look at the opendmarc website and the git pages it
doesn't appear to have been updated in several years.

while I see that it is still available from epel, I wonder if anyone
knows the project status? Is it still active? are there any other
viable alternatives?

thanks in advance!


question re: ls oddity

Hi all!

I use Centos-7 all the time.

spectre variant 2

Hi all!

I'm running an up-to-date Centos-7 on an AMD Vishera 6300, 6 core CPU.

I note that when I run the redhat script to test for spectre & meltdown
I get this result for variant 2:

Variant #2 (Spectre): Vulnerable
CVE-2017-5715 - speculative execution branch target injection
- Kernel with mitigation patches: OK
- HW support / updated microcode: NO
- IBRS: Not disabled on kernel commandline
- IBPB: Not disabled on kernel commandline

and when I run the one from github I get this:

CVE-2017-5715 [branch target injection] aka 'Spectre Variant 2'
* Mitigated according to the /sy

latest skype (version on Centos 7

Hi all!

I've finally been reduced to having to install Skype on my Linux box.
I resisted for years, but now ended up trying it.

and while the latest RPM installs just fine, it refuses to acknowledge
that I have a microphone!

In fact I have two: 1 in the USB web cam (it finds the cam), the second
in a Plantronics USB headset, which works fine but not with skype.
it is as if it doesn't exist.

So, when I connect to someone I can hear them, see them, and they can
see me, but I'm producing no sound output.

All the web hits I can find for nonfunctional microphone on the web
are for Ubuntu.

sqlinux weirdness

Every now and then I get an alert like this one. I have no clue what this
"rear" subsystem is, or why madam would be trying to write to its log

Anyone using GQRX in Centos-7, for SDR ?

I gave myself a toy, one of those cheap USB Software Define Radios, and
would like to use it on my C7 box.

modestly priced laptop for C7

I'm looking to replace my (old, creaky) netbook (Acer Aspire One D255e,
a screaming dual core 1.6 GHz Atom, and a whole 2 gigs of RAM) with
something faster but not too large.

RH software collections

Off topic, since it is a RH question, but I'm hoping someone here can
point me to the right place to pursue this:

We need an official RH build of nginx that contains the lua module(s),
but the nginx builds in the rh scl repository do not.

So, I'm looking for how to make an appropriate contact to inquire if
RH could add lua to their current nginx build for the software collections

I haven't a clue how to approach this, so any guidance would be great!

thanks in advance!

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!


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


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, 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



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="" title=""></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

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


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

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 (the router) to (the RPi). I've also manually tweaked /etc/resolv.conf
to contain instead of

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:


the red error marker points to S