Re: devtmpfs on /dev type devtmpfs
by Paul Schroeder
On Mon, Apr 4, 2016 at 10:02 AM, Paul Schroeder <paul.schroeder(a)nimbix.net>
wrote:
>
>
> On Fri, Apr 1, 2016 at 8:21 PM, Joe Zeff <joe(a)zeff.us> wrote:
>
>> On 04/01/2016 08:05 AM, Paul Schroeder wrote:
>>
>>> I tried both. Neither solution seemed to keep the mount from happening.
>>>
>>
>> Have you considered using umount to remove the unwanted mount in
>> /etc/rc.d/rc.local? It's not exactly elegant, but it should do the trick.
>>
>> Yea. That won't really work:
>
> # umount /dev
> umount: /dev: target is busy.
> (In some cases useful info about processes that use
> the device is found by lsof(8) or fuser(1))
>
>
>
It would appear that the LXC config option for the container,
lxc.automount, determines whether or not LXC decides to mount devtmpfs on
/dev. When lxc.automount = 1, it is obviously on and always does this.
After digging through the LXC code, if the option is not specified, LXC
autodetects whether or not systemd is used inside the container. If it is
detected, LXC automatically turns automount on. (I wish this had been
documented somewhere.) So to stop LXC from mounting /dev, one has to
explicitly set lxc.automount = 0..
However, this causes problems inside the container, causing it to freeze on
boot. It would appear that systemd within my CentOS container is still
trying to mount /dev when it can't. I believe that I have all of the udev
services masked properly, so this must be coming from somewhere else within
systemd. Any further ideas out there?
$ sudo lxc-start -n c7
Failed to mount devtmpfs at /dev: Permission denied
Failed to mount cgroup at /sys/fs/cgroup/systemd: Permission denied
[!!!!!!] Failed to mount API filesystems, freezing.
Thanks! Paul...
8 years, 2 months
OT: Suspend/restore and USB devices
by Patrick O'Callaghan
This is possibly a hardware issue rather than a Fedora problem, but I
thought I'd bring it up anyway:
I have a Bluetooth mouse connected via a BT dongle. The dongle normally
sits on the back of my cpu case on the floor beneath my desk, but I've
noticed this often produces lag in mouse movement, presumably caused by
interference from the desk's metal frame (BTW it took me months to
figure this out). I bought a USB extension cable (cheap Amazon Basics
model) and now have the dongle sitting above the desk and the lag
problems have gone.
So far so good. However now when I suspend the system and try to
restart it, nothing will happen until I physically remove the dongle
from the extension cable. The screen will then come back to life and I
can plug the dongle in again to get the mouse working. This never
happened when the dongle was directly connected to the cpu.
Do I need to get a better cable? If not, what can I do?
poc
8 years, 2 months
VDQ : Aaarrrghghghhh : Gnome 3
by Beartooth
Very Dumb Question :
I've just installed F 23, and failed to tell it to use xfce; how
do I fix that?? (I seem doomed never to find anything in Gnome 3.)
--
Beartooth Staffwright, Neo-Redneck Not Quite Clueless Power User
Remember I have precious (very precious!) little idea where up is.
8 years, 2 months
gnome
by Patrick Dupre
Hello,
In gnome, I can control the maximize and minimize buttons (titlebar
button in windows), but these button (as well as the exit/close x button)
never appear the sub windows.
By click right on the mouse, on the title bar, I get a list of options.
However, I would like to have a direct access to the close option.
Thank for your help.
===========================================================================
Patrick DUPRÉ | | email: pdupre(a)gmx.com
Laboratoire de Physico-Chimie de l'Atmosphère | |
Université du Littoral-Côte d'Opale | |
Tel. (33)-(0)3 28 23 76 12 | | Fax: 03 28 65 82 44
189A, avenue Maurice Schumann | | 59140 Dunkerque, France
===========================================================================
8 years, 2 months
Re: firefox plugins in fedora 21
by Ed Greshko
On 04/04/16 23:22, François Patte wrote:
> I am wondering why firefox is unable to use the plugins (flash, icedtea)
> unless I put an symlink in ~/.mozilla/plugins ?
>
> Everything ok for the install of icedted-web:
>
> /usr/lib64/mozilla/plugins/libjavaplugin.so ->
> /etc/alternatives/libjavaplugin.so.x86_64
>
> and
>
> /etc/alternatives/libjavaplugin.so.x86_64 -> /usr/lib64/IcedTeaPlugin.so
>
> But this does not work and I have to put a link in my .mozilla/plugins
I do not know why it doesn't work for you. I have no sym link in ~/.mozilla/plugins just
an old directory from 2012 for moonlight that I never got to work properly.
[egreshko@meimei plugins]$ pwd
/usr/lib64/mozilla/plugins
[egreshko@meimei plugins]$ ll
total 28
lrwxrwxrwx. 1 root root 41 Mar 25 12:11 libflashplayer.so ->
/usr/lib64/flash-plugin/libflashplayer.so
-rwxr-xr-x. 1 root root 19504 Mar 3 22:58 libgnome-shell-browser-plugin.so
lrwxrwxrwx. 1 root root 41 Feb 22 05:56 libjavaplugin.so ->
/etc/alternatives/libjavaplugin.so.x86_64
-rwxr-xr-x. 1 root root 6912 Feb 10 23:04 librhythmbox-itms-detection-plugin.so
and all is well.
--
In reality, some people should stick to running Windows and others should stay away from
computers altogether.
8 years, 2 months
Shutdown takes too long
by Konstantin Svist
After upgrading the kernel to 4.4.x series, it takes my laptop a long
time to shut down without intervention.
Sometimes I see a status saying something like "wait job is running for
user ... (1m 30sec)"
But a lot of the time I just see the bootup log with "Starting Switch
Root..." being the last line
I noticed one way to shut down is to use sysrq shortcuts (R,E,I from
REISUB combo) -- obviously that's not a perfect solution..
Laptop has dual graphics, if that makes any difference.. Intel+Nvidia
Not sure if filing a bug would even help, most of them just get ignored
for years
8 years, 2 months
info on multiboot f23 and c7
by Gianluca Cecchi
Hello,
I have a nuc6i5 where I have 2 SSD disks.
The M.2 one (250Gb) is seen as sdb, while the sata one (500Gb) as sda.
Initially I have installed f23 on the one seen as /dev/sdb and I presume
the boot loader has been installed on it, correct? How to check?
In a second moment I installed CentOS 7.2 specifying its new partitions
still on the second disk (I plan to use the first as data disk only).
With my surprise CentOS 7 made all in a fantastic way, in the sense that
during the partitioning part it recognized the fedora 23 partitions and its
lvm parts and without asking anything (actually there was no option to
manage grub configuration at all...) it configured its (I think) grub2 so
that the menu contains also the fedora 23 lines (normal one and one labeled
as "Advanced options for Fedora 23...") and they work as expected
So far so good, it went better than I imagined...
Now I have a kernel update proposal for Fedora 23 and I have not applied it
because I don'tknow if it can break anything or not (eg replace grub
configuration or so on...)
ANd the same doubt would be when a CentOS 7 new kernel will be available.
For both the OSes I configured a (different) /boot partition, if this can
be of any importance.
BTW: lastly I would like in the near future to install also the free
version of ESXi to make some tests with it and with oVirt (planned to be
installed on the CentOS 7 OS part), while the Fedora 23 part would be to be
used as a pure desktop one (that already is in place and works like a
charm!)
Thanks in advance for any tip.
Gianluca
8 years, 2 months
info on multiboot f23 and c7
by Gianluca Cecchi
Hello,
I have a nuc6i5 where I have 2 SSD disks.
The M.2 one (250Gb) is seen as sdb, while the sata one (500Gb) as sda.
Initially I have installed f23 on the one seen as /dev/sdb and I presume
the boot loader has been installed on it, correct? How to check?
In a second moment I installed CentOS 7.2 specifying its new partitions
still on the second disk (I plan to use the first as data disk only).
With my surprise CentOS 7 made all in a fantastic way, in the sense that
during the partitioning part it recognized the fedora 23 partitions and its
lvm parts and without asking anything (actually there was no option to
manage grub configuration at all...) it configured its (I think) grub2 so
that the menu contains also the fedora 23 lines (normal one and one labeled
as "Advanced options for Fedora 23...") and they work as expected
So far so good, it went better than I imagined...
Now I have a kernel update proposal for Fedora 23 and I have not applied it
because I don'tknow if it can break anything or not (eg replace grub
configuration or so on...)
ANd the same doubt would be when a CentOS 7 new kernel will be available.
For both the OSes I configured a (different) /boot partition, if this can
be of any importance.
BTW: lastly I would like in the near future to install also the free
version of ESXi to make some tests with it and with oVirt (planned to be
installed on the CentOS 7 OS part), while the Fedora 23 part would be to be
used as a pure desktop one (that already is in place and works like a
charm!)
Thanks in advance for any tip.
8 years, 2 months
Gnuchess
by Timothy Murphy
Is anyone able to get gnuchess hints under Fedora?
I'm using gnuchess with knights, or rather the other way round -
I start knights, and choose gnuchess as chess "engine".
But I see no way to access gnuchess hints.
Incidentally, "gnuchess --xboard" does not seem to work at all.
And starting xboard does not offer any way to use gnuchess,
as far as I can see.
--
Timothy Murphy
gayleard /at/ eircom.net
School of Mathematics, Trinity College, Dublin
8 years, 2 months
Re: Discourse - DeviceMapper causing corruption?
by Philip Rhoades
People,
> Date: Mon, 21 Mar 2016 15:02:02 -0600
> From: Chris Murphy <lists(a)colorremedies.com>
> To: phil(a)pricom.com.au, Community support for Fedora users
> <users(a)lists.fedoraproject.org>
> Subject: Re: Discourse - DeviceMapper causing corruption?
> Message-ID:
> <CAJCQCtSCPQRQsecq0+dzEKdNjEDfBzaDavOOV_e_ARL6LjgkDg(a)mail.gmail.com>
> Content-Type: text/plain; charset=UTF-8
>
> On Mon, Mar 21, 2016 at 1:03 PM, Philip Rhoades <phil(a)pricom.com.au>
> wrote:
>> People,
>>
>> I had a couple of issues to sort out with installing the Docker
>> Discourse
>> app and while that was being done people made these comments:
>>
>> "Devicemapper is non starter, fails spectacularly under load and
>> causes
>> corruption. We block setup if we detect devicemapper. You need aufs or
>> another better supported docker filesystem."
>>
>> - which was not true - it did install without resorting to aufs.
>>
>> also:
>>
>> "Redhat team get very upset when we mention that it just does not work
>> for
>> us, but release after release they say there are no bugs left, and
>> each time
>> we keep seeing Discourse users complain about corruption due to device
>> mapper."
>>
>> Any comments?
>
> On the one hand, I'd say, talk is cheap, show me the bug.
>
> On the other hand, having blown up thinly provisioned pools quite a
> few times early on, I basically couldn't handle how non-deterministic
> the blow ups were, and how difficult the LVM and devicemapper tools
> are to understand the state of the pool, and fix it. So I gave up and
> went down the Btrfs path just because I understand it better, and
> there are only so many rabbit holes one has time and interest to go
> down.
>
> For a good bug report you either need a way to debug it, i.e. you need
> familiarity with that thing you are debugging. Or you need a concise
> set of reproduce steps (and a list of versions) so someone else, like
> a dev or more experienced user, can reproduce that environment and
> steps and debug it. Without one of those two things at least, I think
> it's unreasonable to say "hi this is busted" and then just walk away.
>
> aufs is just not workable in my opinion because it's not in the
> mainline kernel. So any sense of portability can't be that important
> if you're going to depend on aufs. There are plenty of bugs to go
> around at this point, between overlay(fs), btrfs, and devicemapper
> although I think by now most of the devicemapper stuff is probably the
> more stable of the three (?) just a guess really. I had 500+ container
> states as Btrfs subvolumes and never ran into a Btrfs related problem
> though. What are the CoreOS folks using? Overlay or dm?
I had another response on the Discourse forum:
"It's probably this bug, devicemapper seems to be unable to free deleted
files until you delete the container:
https://github.com/docker/docker/issues/188672
Which is catastrophic for any long-lived server that uses temporary
files in any capacity at all."
Does that also make sense to more clued-up tech people than me?
Regards,
Phil.
--
Philip Rhoades
PO Box 896
Cowra NSW 2794
Australia
E-mail: phil(a)pricom.com.au
8 years, 2 months
