Postings by Jerry Geis

Nvidia error

I am getting this error on CentOS 7.4

kernel: NVRM: API mismatch: the client has the version 384.98, but#012NVRM:
this kernel module has the version 384.90.

Error message at times

I see this message once in a while:
Buffer I/O error on dev dm-1, logical block 8388592, async page read

I am using two crucial SSD as RAID-1 on CentOS 7.4

What should I do? can I mark that block as not usable. ?



/usr/bin/x0vncserver large blocks on screen at times

I use this vnc program to remote into my station. (C 7.4)

When I do, about every 5 to 10 seconds a big solid block appears on my
screen. About six inches long and 3 inches wide. it quickly then goes away.

I use the viewer when I do this.

Is there some setting that would help with this ?


Dahdi get latest

I am trying to use dahdi complete 2.11.1 with a 4.13 kernel. - NOT working
for know reasons.
I tried applying two patches but still get compile errors. AHHH!

How do I just use git to get the latest with the fixes ????

This command did not work - I still get the errors.
git clone git:// dahdi-linux



compile webkit

I am trying to compile webkitgtk
I downloaded the webkit source, extracted

CMake Error at Source/cmake/OptionsGTK.cmake:12 (message):
GCC 4.9.0 is required to build WebKitGTK+, use a newer GCC version or

I downloaded 2.14.7 - just like CentOS 7.4 has, how can I be getting a GCC
error ?

My goal is to get the MediaSource package in webkit working. It seems to
not be enabled.
Is there a better way ?



VNC into CentOS 7.4

When I VNC into 7.4 everything is fine until I run vmplayer (VMware).
The vmplayer runs but when I type on the console for vmplayer which is also
running a centos image I get multiple key presses - sometimes. Its not
everytime - but enough to be annoying.

How do I take care of that ?


vmplayer for linux 12.5.7 on CentOS 7.4

So after the update to CentOS 7.4 vmplayer 12.5.7 is no longer working.

I can't believe after all the time that RHEL 7.4 has been released and
VMware has not fixed the issue and made a new release.

What is everyone doing that used the vmplayer on linux?



webkit on CentOS 7.4

Hello is the webkit with CentOS 7.4 compiled with ENABLE_MEDIASOURCE ?

When I call the set_media_source function with TRUE and then ask
get_media_source function for the value it returns TRUE. I presume it would
no return TRUE if its not enabled.

However, my webpage with a video tag using webkit is not finding the



update to 7.4

I was doing an update to 7.4 and somewhere in middle the machine died.

If I drop back to a previous kernel the machine is alive. So how do I say
"forget the previous yum update" and start all over and do it again.

Booting into the new kernel I get a kernel fault. So going back one level
on teh boot screen solves that - I just need to start the update again. How
is that?



vmware player 12.5.7 with CentOS 7.4

hi all - anyone find a way to get vmware player 12.5.7 working with 7.4?

Thanks - everything good with the upgrade except that.

Great job CentOS team!


starting vmplayer I get the following:
Note: adwaita is installed.
canberra is installed
No idea what pk is ?


(vmware-modconfig:12595): Gtk-WARNING **: Unable to locate theme engine in
module_path: "adwaita",
/usr/share/themes/Adwaita/gtk-2.0/main.rc:733: error: unexpected identifier
`direction', expected character `}'

(vmware-modconfig:12595): Gtk-WARNING **: Unable to locate theme engine in
module_path: "adwaita",

Update to 7.4 using DVD

I am attempting to update to 7.4 using the DVD

I get these errors(truncated list)
Error: Package: libgpod-0.8.3-14.el7.x86_64 (@epel)
Removing: usbmuxd-1.0.8-11.el7.x86_64 (@anaconda)
Obsoleted By: usbmuxd-1.1.0-1.el7.x86_64 (c7-media)
Not found
Error: Package: network-manager-applet-1.4.0-2.el7.x86_64 (@base)
Requires: libnma(x86-64) = 1.4.0-2.el7
Removing: libnma-1.4.0-2.el7.x86_64 (@base)
libnma(x86-64) = 1.4.0-2.el7

intel wireless 3165 and CentOS 7.3

I am trying to get wireless working on CentOS 7.3 with intel wireless 3165

ip link
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN mode
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state
UP mode DEFAULT qlen 1000
link/ether b8:ae:ed:77:b3:3a brd ff:ff:ff:ff:ff:ff
3: wlan0: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN mode DEFAULT
qlen 1000
link/ether 34:02:86:cc:a0:79 brd ff:ff:ff:ff:ff:ff
4: virbr0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state

Centos 7 Install

I have a Centos 7 install that seems to be filling up disk space to 100% on
the root partition.

in /tmp I found files of names...
systemd-private-XXXXXXXX-colord and rtkit
I have never seen these files before.

there were also files of XXXXXXXXXXXXX.tmp in the /tmp folder.

Why are these files appearing? I have a number of installs and never came
across this before.



Custom kickstart post section on usb thumbdrive

Hi All,

I am attempting to create a custom USB drive for kickstart install.

I found this:
1. get the ISO file of CentOS 7

2. mount -o loop CentOS-7.0*.iso /mnt/

3. mkdir -p

4. rsync -avz /mnt/ /CentOS-7-ISO-respin/RHEL-7-unpacked

5. put your kickstart file into


CentOS 7.3 and e1000e

Hi All - I have a box running the above. Power was lost long enough that
UPS did not work. When power came back on the C7 box boots way faster than
the switch and resulted in no network. power cycling the C7 box resulted in

This even happened a second time. The only way to get the box back was to
power cycle. the box is remote and no keyboard and mouse connected.

Any thoughts on why the e1000e would not talk to the switch ? The switch is
an unmanaged linksys - could not get the model.

Updating to CentOS 7.3

I have remote systems that need updating. C5 and C6 systems.

Is there a "method" that is out there that you can load an ISO of 7.3 on a
different partition (other than root) tell the boot up process that the ISO
is there, do a clean install, install everything, auto reboot, and now C7
is installed and running.

Some configuring will be required after - but that is fine.

Crazy thought about upgrading to new major release

I have older systems out there that work fine, just for what ever reason
would be great to upgrade from a C5 -> C7 (due to no longer supported) or
C6 > C7 (for updated packages).

Sounds like the upgrade tool is not quite an option...
I was thinking...

What would be wrong with any "easy" script that did the following:

1) Removed all packages with the --justdb option.
2) Import the RPM-GPG-KEY-CentOS-7
3) install the centos-release-7.3.1611 ...

Upgrade 6 to 7

I found this site <a href="" title=""></a>

Is this still the case - there is no upgrade path from 6 to 7 ?

I have a few remote servers I'd like to upgrade (if possible).



CentOS 7 and sound


I have a need to get CentOS 7 sound working on a console only machine. X is
not running.

Currently when I try aplay:
aplay /usr/share/sounds/alsa/Front_Center.wav
ALSA lib pulse.c:243:(pulse_connect) PulseAudio: Unable to connect:
Connection refused

aplay: main:786: audio open error: Connection refused

aplay -l
**** List of PLAYBACK Hardware Devices ****
card 1: PCH [HDA Intel PCH], device 0: ALC283 Analog [ALC283 Analog]
Subdevices: 1/1
Subdevice #0: subdevice #0

So sound is present - I presume pulseaudio is not running as X is not

Can I run audio without X ?

Basic authentication - maybe off topoc

Hi - I am using CentOS 7.3 and trying to receive basic authentication.

I run a command liked: curl -X POST -u jerry:pw
<a href="" title=""></a>

When I use printenv in the cgi I do not see the user and password anywhere.
Isn't it supposed to be there in an environment variable like REMOTE_USER ?

How do I receive the basic authentication ?



Chrome version 28 for CentOS 6 or last official version that worked on C6

Anyone know where I can download version 28 of chrome for C6?

I know there are "other" ways to get the latest... and install on C6...
I know version 28 is old and unsupported and all that...

But that is what I need.

I think it was the last official build that worked on C6 "as is".

Thanks for your help.


email subject length issue

Hello all

I seem to be running into a subject length issue on email. Is there any way
to increase that ?



Timezone and date

When I do the date +%Z I get the timezone. Which currently is EDT.

I am sending information to another system, that says EDT is not a valid

Updated webkit

Has anyone updated their webkit in CentOS 7 to something much newer ?
LIke 2.14.5 ?

If so how might I do that. Thanks,


usb 3.1 support in CentOS 7

Hi All - Been trying to find out if USB 3.1 support is in CentOS 7 and
kernel 3.10 ?

I see its in the 4.X kernel - but what about CentOS 7?

Was hoping to make my external backups faster.


base64 response for websockets

I'm trying to generate the correct response to a websocket connect.

The websocket connect is:
GET /chat HTTP/1.1
Upgrade: websocket
Connection: Upgrade
Sec-WebSocket-Key: dGhlIHNhbXBsZSBub25jZQ==
Sec-WebSocket-Version: 13

So I take the Sec-WebSocket-Key above and add the extra part and put that
in /tmp/sha1

I then run sha1sum /tmp/sha1 and it gives:

I put that in a file /tmp/base64 and run
base64 /tmp/base64

The result of that is:

USB 2.0 device on a USB 3.0 plug

When I plug in my device which is USB 2.0 into a 3.0 slot (cause that is
all I have)
[495042.943074] usb 5-2: new low-speed USB device number 6 using xhci_hcd
[495043.100076] usb 5-2: device descriptor read/64, error -71

I receive the above error.

Is there a flag or setting that tells the USB to in a 2.0 mode ?



Trick to compile older packages

I am trying to add a package (I know its older - but it should work)
gst-rtsp-server-0.10.8 to CentOS 7.
The gstreamer 0.10 packages are included in C7 and they compile just fine.

When I extract and try to compile gst-rtsp-server 0.10.8 the ./configure
goes fine.
but the make results in errors:

make all-recursive
make[1]: Entering directory
Making all in gst
make[2]: Entering directory
Making all in rtsp-server
make[3]: Entering directory

Rebuild gstreamer

Hi all,

I have a need to rebuild the gstreamer and gst-plugins in CentOS 7.
So I found the wiki for rebuilding a source package...
I downloaded the files, installed them with dependencies.

I did the rpmbuild -ba for each of the four packages.

software raid 1 failure

Hi All,

I had a machine with software RAID-1 have a disk crash. I am attempting to
get the data off the good disk. Using a USB to SATA device I plugged it
into another machine. I tried many things to mount it, to mdadm add it but
could not get it to cooperate.

Another thought I had is can I use fdisk to change the "type" of the
partition from "linux raid" to "linux" and then mount as normal?

Does that work?