Re: [gentoo-user] (OT) Recommendations for WLAN-AP?

[wabenbau]

Paul Tobias  wrote:

> On 2 May 2015 at 17:17,  wrote:
> 
> > Volker Armin Hemmann  wrote:
> >
> > > Am 27.04.2015 um 20:37 schrieb waben...@gmail.com:
> > > > I'm searching for a new WLAN-AP that is fast, powerful and
> > > > reliable. I can remember that there were some recommendations in
> > > > this list some weeks/months ago, but I can't find them.
> > > >
> > > > Regards
> > > > wabe
> > > >
> > > >
> > >
> > > tplink archer series?
> > >
> > > can cope with 20 laptops at the same time easily and is not too
> > > expensiv.
> >
> > Thanks Volker. I will have a look at it.
> >
> > --
> > Regards
> > wabe
> >
> >
> Hi wabe, did you decide yet? You might find this article useful:
> http://arstechnica.com/gadgets/2015/03/from-the-wirecutter-the-best-wi-fi-router-for-most-people-anyway/
> 
> Before that article came out, I also arrived at the same conclusion:
> the TP-Link Archer C7 v2 is the best for me. My requirements also
> included OpenWRT support.

I have two questions about the Archer C7 v2.

1. Can the stock firmware handle multiple SSIDs and VLANs?
2. Can OpenWRT on the Archer C7 handle multiple SSIDs and VLANs?

--
Regards
wabe

Re: [gentoo-user] Re: question for en_GB users of myspell-en dictionaries

[Peter Humphrey]

On Tuesday 19 May 2015 17:43:57 »Q« wrote:

> The main difference between standard UK spelling and Oxford spelling is
> that Oxford spelling uses -ize endings (criticize, optimize) whereas
> standard UK spelling uses -ise.  Using Oxford will make most readers
> think you're using American spelling, since Americans use -ize.

Yes, and I've never understood that. The -ise version is true to its French 
origins (remember 1066?), while as far as I can see the -ize version has no 
precedent. It also doesn't help with knowing which ending to use in a 
particular case, so I've no idea why they've adopted it.

Moreover, Oxford English insists on that egregious comma before nearly every 
"and", which is just stupid. It causes as many problems as it avoids, and it's 
deadly to the flow of the sentence. I once argued about it with an American 
contributor to an e-mail list, and was told "it's a matter of style". No. 
Wrong. It's just slavish obedience of an arbitrary rule which cannot be 
justified in any rational way. Just consider: "and" is equivalent to a comma in 
most cases; it's how a child starts out until it learns something more 
sophisticated. So pairing the two leaves us with nonsense.

Just my two penn'orth.

-- 
Rgds
Peter

[gentoo-user] Re: question for en_GB users of myspell-en dictionaries

[»Q«]

On Mon, 11 May 2015 20:29:37 + (UTC)
James  wrote:

> »Q«  gmx.net> writes:
> 
> 
> > tl;dr:  Is an update to the myspell-en Oxford  spelling dictionary
> > really wanted by anyone?  
> 
> Oxford is known as the 'the reference' for unabridged dictionaries in 
> English (at least this is what some psychotic professors tortured us
> with, in English 101/102 some decades ago; leather helmets, dinosaurs
> etc).. ymmv.

For meanings and etymology, the OED is the gold standard, but we're
just talking about spellchecking dictionaries here.  The Oxford
spelling is *not* the spelling used by most of the UK.  It's the
official spelling of the Oxford University Press and some academic
journals, such as /The Lancet/, and people writing for those
publications need it.  Most Oxford dons don't use the Oxford spelling.
IOW, only people who have to write according to style guides which
explicitly specify Oxford spelling need an Oxford spellchecking
dictionary.

I'm interpreting the feedback from you and Joost to mean "yes we want a
good UK spelling dictionary", which you'll get.  If it really is
*Oxford* spelling one of you needs, I need to hear a more specific
plea (e.g., "I write for The Lancet/").

My mother has a Ph.D. in English Lit, and there was always a concise
OED around my house when I was growing up, but she was unaware of the
"Oxford spelling" until I asked her about it recently.

The main difference between standard UK spelling and Oxford spelling is
that Oxford spelling uses -ize endings (criticize, optimize) whereas
standard UK spelling uses -ise.  Using Oxford will make most readers
think you're using American spelling, since Americans use -ize.

>  I hope it is available system wide for a variety of apps?

Yes, these are system dictionaries.  `equery d hunspell aspell enchant`
will probably show you most of the things on your system that use these
dictionaries.  (I don't know what GNOME uses, but it probably depends
on either hunspell or aspell.)

Re: [gentoo-user] Tips for fresh install with GRUB2+RAID1+LVM2

[Stefan G. Weichinger]

Am 2015-05-19 um 22:17 schrieb Rich Freeman:
> On Tue, May 19, 2015 at 12:23 PM,   wrote:
>>
>> Do you know if the Samsung 850 evo or similar are considered brain-dead?
>>
> 
> That's what I'm using, and I couldn't find anything too useful on
> Google, so I might just test it out.

wow, that thread is rather active

my 2 cents: one samsung 850 evo 500gb here in my main desktop, with
btrfs on it, and I decided to run "fstrim -va" every few days manually
... kind of when I am at keeping things in shape or so ... along "btrfs
scrub" on fridays ...

I also have "written" / cut-and-pasted systemd-timers for that but I
disabled them for now.

"discard" in fstab was documented to slow down things and who wants
*that* ??

;)

Re: [gentoo-user] Tips for fresh install with GRUB2+RAID1+LVM2

[Rich Freeman]

On Tue, May 19, 2015 at 12:23 PM,   wrote:
>
> Do you know if the Samsung 850 evo or similar are considered brain-dead?
>

That's what I'm using, and I couldn't find anything too useful on
Google, so I might just test it out.

-- 
Rich

Re: [gentoo-user] Tips for fresh install with GRUB2+RAID1+LVM2

[Nuno Magalhães]

On Tue, May 19, 2015 at 3:44 PM, Peter Humphrey  wrote:
> Hmm. Looks like I'm hijacking Nuno's thread. Apologies if that's ruffled any
> feathers, but I think I'm still on-topic, more or less, and he may still be
> interested in the conversation.

No sweat, i intend to get an SSD for my laptop. It interests me and
it's on topic. :)

Re: [gentoo-user] Re: Question for users of the Firefox browser

[Daniel Frey]

On 05/19/2015 09:35 AM, »Q« wrote:
> ctrl+k does the same thing for the search box.  (And if the search box
> is hidden in your UI, ctrl+k opens about:home and puts the carat in its
> search box.)
> 
> For browsers a lot of things are mousey, but for inherently type-y
> things, I really like the keyboard shortcuts.  All (or most) Fx ones are
> listed at
> .
> 

I didn't know that either. I've always found Alt+D the easiest to use,
and the search box to me is Alt+D then Tab.

Dan

Re: [gentoo-user] Re: Brother missed in cups listing

[Silvio Siefke]

On Tue, 19 May 2015 17:28:57 + (UTC) James
 wrote:

> Did you keep a backup of the old working config files on that system?

No i have not, i has use cups not so often because i not often print. 
But when i use i ever pluged in, make config in cups and it works. But
now not work. 
 
> For me it's these files; I just append a date to the end of the file:
> 
> /etc/cups/
> 
> 
> cupsd.conf.15mar2015
> cups-files.conf.3apr2015 
> printers.conf.15mar2015
> snmp.conf.15mar2015
> 
> 
> Also, brother printers, like most, work better in a 
> linux/unix centric network when they are ethernet
> connected. If you have your printers plugged into ethernet, then you 
> can connect to them (via ethernet) by just typing in the ip address
> of the printer into your web browser. That makes checking the
> embedded printer configuration much simpler.

Yes sure when i buy new one i sure think on it. But now is not networking
and Brother give driver for the printer and it work not. 

Okay im not sure what has do but now my brother is in cups listed, correct
with usb but it print not, say success but page come not out. 

access.log
localhost - - [19/May/2015:20:06:16 +0200] 
"POST /printers/MFC7320 HTTP/1.1" 200 16467 Print-Job successful-ok

error.log
W [19/May/2015:20:03:40 +0200] CreateProfile failed: 
org.freedesktop.DBus.Error.ServiceUnknown:The name org.freedesktop.ColorManager 
was not provided by any .service files
W [19/May/2015:20:03:40 +0200] CreateDevice failed: 
org.freedesktop.DBus.Error.ServiceUnknown:The name org.freedesktop.ColorManager 
was not provided by any .service files
W [19/May/2015:20:03:40 +0200] CreateProfile failed: 
org.freedesktop.DBus.Error.ServiceUnknown:The name org.freedesktop.ColorManager 
was not provided by any .service files
W [19/May/2015:20:03:40 +0200] CreateProfile failed: 
org.freedesktop.DBus.Error.ServiceUnknown:The name org.freedesktop.ColorManager 
was not provided by any .service files
W [19/May/2015:20:03:40 +0200] CreateDevice failed: 
org.freedesktop.DBus.Error.ServiceUnknown:The name org.freedesktop.ColorManager 
was not provided by any .service files
W [19/May/2015:20:04:18 +0200] CreateProfile failed: 
org.freedesktop.DBus.Error.ServiceUnknown:The name org.freedesktop.ColorManager 
was not provided by any .service files
W [19/May/2015:20:04:18 +0200] CreateDevice failed: 
org.freedesktop.DBus.Error.ServiceUnknown:The name org.freedesktop.ColorManager 
was not provided by any .service files

cups/printers.conf

UUID urn:uuid:4f27ca0f-cbeb-34cb-55f8-480a2c66422d
AuthInfoRequired none
Info MFC7320
Location 
MakeModel Brother MFC7320 for CUPS
DeviceURI usb:/dev/usb/lp0
State Idle
StateTime 1432058183
Type 8392708
Accepting Yes
Shared Yes
JobSheets none none
QuotaPeriod 0
PageLimit 0
KLimit 0
OpPolicy default
ErrorPolic

But nothing happen, the printer not speak with laptop or other. 

Thank You & Nice Day
Silvio


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[gentoo-user] Re: Poor mans audio in the world of the great Jack D.

[James]

  gmx.de> writes:


> >  media-sound/qjackctlhttp://qjackctl.sourceforge.net/

> And master James moved slightly and asked a simply question.
> Suddenly the novice was enlighted.
> He answers "It is used for my PC." And after a while he added:
> "I want to decode sstv and weather fax."

SSTV? really?  now you are just teasing an old (EE) fart?
That's a real application, it just hard to keep the sync bit stable.


> And in the distant a little radio whispers
> "Di da da di di da da da di da di di".

Once (in my youth) I dated a young, friendly lass, named 'Candy Morse'
do da da do da da..!


> And the fog raises and everything becomes clear as it was in
> the beginning.

This is unknown to me; but you might find help if you get sstv audio
signals parsed out of your serial line signal, if I am to speculate
what you are really after? You may need a spectrum analyzer to identify
and isolate the audio signal since the signal is a superposition
(hybrid) signal. It might be best to filter the audio signal out
in the Rf domain, as opposed to it's digital derivative signal.

http://users.belgacom.net/hamradio/index.htm

under software he has rx-sstv for windoz. Get it working under doz
and then hunt for a linux setup, using windows to verify it
all works (hardware wise) first, is one possible path.

Also : http://www.dxatlas.com/SstvTools/

and in portage (just to be complete)  media-radio/qsstv

Also verify the chipsets used (dongle?) and their reliability at various
frequencies. Those chipssets that are wideband, are always problematic,
imho Most of the crap (dongles) floating around are not very good.
Me, I'd go to the trouble to find a new chipset, including filters and
LNAs (low noise amplifiers) to build a decoder box. You could probably
sell them. If you go that route, drop to me privately.

Dowload PDF - Image Communication on Short Waves
www.sstv-handbook.com/download/sstv_04.pdf


good hunting!
James

[gentoo-user] Re: Brother missed in cups listing

[James]

Silvio Siefke  web.de> writes:



> > Has it worked ever before (e.g. it stopped working 
> > after an upgrade of so?)
> 
> On my acer it has last worked in january when i correct remember.


Did you keep a backup of the old working config files on that system?

For me it's these files; I just append a date to the end of the file:

/etc/cups/


cupsd.conf.15mar2015
cups-files.conf.3apr2015 
printers.conf.15mar2015
snmp.conf.15mar2015


That way it's fairly trivial to re-construct working cups files
after an upgrade has gone errant.
Do you have backups of the /etc/cups/ dir?
If it worked on the acer it should work everywhere. Often I just copy
/etc/cups/* files from one systems to the next, rather than deal with
that ever_changing cups interface. Also, brother printers, like most,
work better in a linux/unix centric network when they are ethernet
connected. If you have your printers plugged into ethernet, then you 
can connect to them (via ethernet) by just typing in the ip address of the
printer into your web browser. That makes checking the embedded printer
configuration much simpler.


hth,
James

[gentoo-user] Re: Question for users of the Firefox browser

[»Q«]

On Sun, 17 May 2015 14:41:21 -0700
walt  wrote:

> I've noticed that, when running linux, the end result of "selecting"
> text can depend on which "Desktop Environment" you are using.

Yes indeed.  If the DE comes with a clipboard manager (most do), it
pays to play around with the manager's config until the clipboard stops
annoying you.  Whether or not it syncs with the X clipboard and/or
whether it requires an explicit 'copy' command (as opposed to picking
up mere highlighting) should be set to suit the user's habits, rather
than the user trying to conform to the clipboard manager's defaults.

[gentoo-user] Re: Question for users of the Firefox browser

[»Q«]

On Mon, 18 May 2015 09:07:34 +0300
Gevisz  wrote:

> On Mon, 18 May 2015 06:26:31 +0100 Mick 
> wrote:
> 
> > On Monday 18 May 2015 02:56:43 Daniel Frey wrote:

> > > I usually use Alt+D on the keyboard, it moves the caret to the
> > > location bar and highlights its text, and I just checked, it
> > > doesn't touch the clipboard.
> > 
> > Useful tip!  I didn't know about Alt+D, thanks for sharing.  :-)
> 
> The same does Ctrl-L.  

ctrl+k does the same thing for the search box.  (And if the search box
is hidden in your UI, ctrl+k opens about:home and puts the carat in its
search box.)

For browsers a lot of things are mousey, but for inherently type-y
things, I really like the keyboard shortcuts.  All (or most) Fx ones are
listed at
.

Re: [gentoo-user] Brother missed in cups listing

[Silvio Siefke]

On Tue, 19 May 2015 16:24:17 +0200 Manuel Schönlaub
 wrote:

> Hi,
> 
> Did you install the correct driver from Brother?

Yes i have installed the correct driver on both maschines i delete old 
one and install new. 


> Has it worked ever before (e.g. it stopped working 
> after an upgrade of so?)

On my acer it has last worked in january when i correct remember. Since 
then cups not find it. On my tell i has last time print in March and now
there the same. Printer Not work, sending data thats all. Has delete 
printer after driver new install and now not find in cups. 

Cups > Add Printer > Local printer only pdf or nothing. 

I dont know what happen now. I can not understand the problem, under
Arch Linux the printer works without probs, friend come checked today
for me. But under gentoo the printer is not found. Very strange. 

Kernel Config : http://silviosiefke.com/downloads/kernelconf

Thank You & Nice Day
Silvio


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Re: [gentoo-user] Tips for fresh install with GRUB2+RAID1+LVM2

[covici]

Rich Freeman  wrote:

> On Tue, May 19, 2015 at 11:22 AM,   wrote:
> > On Tue, May 19 2015, Peter Humphrey wrote:
> >
> >> On Tuesday 19 May 2015 10:53:26 Rich Freeman wrote:
> >>> On Tue, May 19, 2015 at 10:44 AM, Peter Humphrey 
> >> wrote:
> >>> > Incidentally, what's the received wisdom on frequency of file-system
> >>> > trimming on SSDs these days? I've seen values quoted between twice a day
> >>> > and once a week. And how does trimming affect btrfs?
> >
> > I included "discard" in fstab for my ssd filesystems, presumably
> > following some installation guide.  For example I have
> >
> >   /dev/sda5 / ext4noatime,discard   0 1
> >   /dev/vg/local /localext4noatime,discard   0 2
> >
> > Is it preferred to instead issue explicit trim's via cron?
> >
> 
> It depends.
> 
> In theory giving your drive useful information about allocation now is
> better than giving it the information later.  The drive can make use
> of that information to improve performance.
> 
> In practice some drives have brain-dead firmware and they'll do stupid
> things with that information.  If you trim part of an erase block, the
> drive should just file that info away and make use of that information
> when it can.  However, some drives will immediately copy/erase the
> rest of the block at that moment, which creates an unnecessary erase
> cycle and creates IO load at a moment that the drive is already busy.
> 
> So, if your drive isn't brain-dead discard is better.  If your drive
> is brain-dead fstrim is almost as good if the drive isn't too full.
> I've yet to test discard and see how well it works.

Do you know if the Samsung 850 evo or similar are considered brain-dead?

-- 
Your life is like a penny.  You're going to lose it.  The question is:
How do
you spend it?

 John Covici
 cov...@ccs.covici.com

Re: [gentoo-user] Tips for fresh install with GRUB2+RAID1+LVM2

[gottlieb]

On Tue, May 19 2015, Rich Freeman wrote:

> On Tue, May 19, 2015 at 11:22 AM,   wrote:
>> On Tue, May 19 2015, Peter Humphrey wrote:
>>
>>> On Tuesday 19 May 2015 10:53:26 Rich Freeman wrote:
 On Tue, May 19, 2015 at 10:44 AM, Peter Humphrey 
>>> wrote:
 > Incidentally, what's the received wisdom on frequency of file-system
 > trimming on SSDs these days? I've seen values quoted between twice a day
 > and once a week. And how does trimming affect btrfs?
>>
>> I included "discard" in fstab for my ssd filesystems, presumably
>> following some installation guide.  For example I have
>>
>>   /dev/sda5 / ext4noatime,discard   0 1
>>   /dev/vg/local /localext4noatime,discard   0 2
>>
>> Is it preferred to instead issue explicit trim's via cron?
>>
>
> It depends.
>
> In theory giving your drive useful information about allocation now is
> better than giving it the information later.  The drive can make use
> of that information to improve performance.
>
> In practice some drives have brain-dead firmware and they'll do stupid
> things with that information.  If you trim part of an erase block, the
> drive should just file that info away and make use of that information
> when it can.  However, some drives will immediately copy/erase the
> rest of the block at that moment, which creates an unnecessary erase
> cycle and creates IO load at a moment that the drive is already busy.
>
> So, if your drive isn't brain-dead discard is better.  If your drive
> is brain-dead fstrim is almost as good if the drive isn't too full.
> I've yet to test discard and see how well it works.

Understood. Thank you.
allan

Re: [gentoo-user] Tips for fresh install with GRUB2+RAID1+LVM2

[Rich Freeman]

On Tue, May 19, 2015 at 11:22 AM,   wrote:
> On Tue, May 19 2015, Peter Humphrey wrote:
>
>> On Tuesday 19 May 2015 10:53:26 Rich Freeman wrote:
>>> On Tue, May 19, 2015 at 10:44 AM, Peter Humphrey 
>> wrote:
>>> > Incidentally, what's the received wisdom on frequency of file-system
>>> > trimming on SSDs these days? I've seen values quoted between twice a day
>>> > and once a week. And how does trimming affect btrfs?
>
> I included "discard" in fstab for my ssd filesystems, presumably
> following some installation guide.  For example I have
>
>   /dev/sda5 / ext4noatime,discard   0 1
>   /dev/vg/local /localext4noatime,discard   0 2
>
> Is it preferred to instead issue explicit trim's via cron?
>

It depends.

In theory giving your drive useful information about allocation now is
better than giving it the information later.  The drive can make use
of that information to improve performance.

In practice some drives have brain-dead firmware and they'll do stupid
things with that information.  If you trim part of an erase block, the
drive should just file that info away and make use of that information
when it can.  However, some drives will immediately copy/erase the
rest of the block at that moment, which creates an unnecessary erase
cycle and creates IO load at a moment that the drive is already busy.

So, if your drive isn't brain-dead discard is better.  If your drive
is brain-dead fstrim is almost as good if the drive isn't too full.
I've yet to test discard and see how well it works.

-- 
Rich

Re: [gentoo-user] Re: Poor mans audio in the world of the great Jack D.

[Meino . Cramer]

James  [15-05-19 03:02]:
>   gmx.de> writes:
> 
> 
> > From time to time I come across software, which directly wants
> > to talks to good ole' alsa and get kicked by Sensei Jack D. for accessing
> > a device, which already is occupied by him...
> 
> Well, this is a different question depending if you are asking for a
> gentoo workstation/server or one of your 'embedded' gentoo boards?
> 
> 
> > Is there any way to go or any software to install which enables me to use
> > Jack D.'ed software and alsa-acessing without shutting down and
> > restarting that grandmaster Jack D. ?
> 
> 
> I ran across this qt 'audio app' some time ago but have yet to download it
> and see what it can do. *maybe* it'll fill the need you have?
> 
>  media-sound/qjackctlhttp://qjackctl.sourceforge.net/
> 
> 
> > Meino
> 
> hth,
> James
> 

And master James moved slightly and asked a simply question.
Suddenly the novice was enlighted.
He answers "It is used for my PC." And after a while he added:
"I want to decode sstv and weather fax."
And in the distant a little radio whispers
"Di da da di di da da da di da di di".
And the fog raises and everything becomes clear as it was in
the beginning.

Re: [gentoo-user] Poor mans audio in the world of the great Jack D.

[Meino . Cramer]

Emanuele Rusconi  [15-05-19 03:01]:
> On 18 May 2015 at 19:54,  wrote:
> >
> > Hi,
> >
> > From time to time I come across software, which directly wants
> > to talks to good ole' alsa and get kicked by Sensei Jack D. for accessing
> > a device, which already is occupied by him...
> >
> > Is there any way to go or any software to install which enables me to use
> > Jack D.'ed software and alsa-acessing without shutting down and
> > restarting that grandmaster Jack D. ?
> >
> > Thanks a lot for any Koan, which will light up my darkened ears!
> > Best regards,
> > Meino
> >
> >
> >
> 
> And so the wise ~/.asoundrc thus spake:
> 
> 
> ## http://jackaudio.org/faq/routing_alsa.html
> ## http://www.alsa-project.org/main/index.php/Asoundrc
> pcm.jackplug {
> type plug
> slave { pcm "rawjack" }
> hint { description "JACK Audio Connection Kit" }
> }
> pcm.rawjack {
> type jack
> playback_ports {
> 0 system:playback_1
> 1 system:playback_2
> }
> capture_ports {
> 0 system:capture_1
> 1 system:capture_2
> }
> }
> 
> 
> -- Emanuele Rusconi
> 


Wise the words may sound and nice to hear.
But the shell spake

#>qsstv
using visual class 4, id 2b
hijackWindow() context created for QSplashScreen(0x7ffecb5760c0) 1 
Created Window Surface FBO QSize(736, 330) with samples 8 
Card  0 name:  HDA ATI SB 
Card  1 name:  HDA NVidia 
Card  2 name:  HDA NVidia 
ALSA lib 
/var/tmp/portage/media-libs/alsa-lib-1.0.28/work/alsa-lib-1.0.28/src/pcm/pcm_dmix.c:1022:(snd_pcm_dmix_open)
 unable to open slave
"Unable to open default: Device or resource busy" 
hijackWindow() context created for mainWindow(0x1820730, name = "MainWindow") 1 
Created Window Surface FBO QSize(897, 530) with samples 8 

The master control program (qsstv) raises its shield against Tron, displaying 
"Sound card error: Device or resource busy."

And silence was the only voice heard by the folks...
And nothing was displayed anymore.

Re: [gentoo-user] Tips for fresh install with GRUB2+RAID1+LVM2

[gottlieb]

On Tue, May 19 2015, Peter Humphrey wrote:

> On Tuesday 19 May 2015 10:53:26 Rich Freeman wrote:
>> On Tue, May 19, 2015 at 10:44 AM, Peter Humphrey  
> wrote:
>> > Incidentally, what's the received wisdom on frequency of file-system
>> > trimming on SSDs these days? I've seen values quoted between twice a day
>> > and once a week. And how does trimming affect btrfs?

I included "discard" in fstab for my ssd filesystems, presumably
following some installation guide.  For example I have

  /dev/sda5 / ext4noatime,discard   0 1
  /dev/vg/local /localext4noatime,discard   0 2

Is it preferred to instead issue explicit trim's via cron?

thanks,
allan

Re: [gentoo-user] Tips for fresh install with GRUB2+RAID1+LVM2

[Marc Joliet]

Am Tue, 19 May 2015 10:53:26 -0400
schrieb Rich Freeman :

> On Tue, May 19, 2015 at 10:44 AM, Peter Humphrey  
> wrote:
> >
> > Incidentally, what's the received wisdom on frequency of file-system 
> > trimming
> > on SSDs these days? I've seen values quoted between twice a day and once a
> > week. And how does trimming affect btrfs?
> >
> 
> I've been trimming mine daily, and I've yet to be able to distinguish
> it from a no-op.  As far as I can tell fstrim -v always outputs 0
> bytes trimmed.

(Note that I'm also a btrfs user.)

I've been using the systemd timer that comes with util-linux upstream without
modification, which runs fstrim weekly.  That seems to work well, but to be
quite honest, I wouldn't know how to tell.  Sometimes I wasn't even sure it
ran, so I would run it manually, and it always finished nigh-instantaneously.

Before that, I used the discard mount option, but apparently that's only a good
idea with high-end SSDs (not that I noticed much of a difference in everyday
usage).

-- 
Marc Joliet
--
"People who think they know everything really annoy those of us who know we
don't" - Bjarne Stroustrup


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Re: [gentoo-user] Tips for fresh install with GRUB2+RAID1+LVM2

[Rich Freeman]

On Tue, May 19, 2015 at 11:00 AM, Peter Humphrey  wrote:
> On Tuesday 19 May 2015 10:53:26 Rich Freeman wrote:
>> On Tue, May 19, 2015 at 10:44 AM, Peter Humphrey 
> wrote:
>> > Incidentally, what's the received wisdom on frequency of file-system
>> > trimming on SSDs these days? I've seen values quoted between twice a day
>> > and once a week. And how does trimming affect btrfs?
>>
>> I've been trimming mine daily, and I've yet to be able to distinguish
>> it from a no-op.  As far as I can tell fstrim -v always outputs 0
>> bytes trimmed.
>
> Ah, well that's quite different from my Atom box with its 64GB SSD; before I
> remove the -v a few weeks ago it was reporting many megabytes trimmed most
> times it ran. That's on ext4 and running Gentoo with http-replicator service.
>

So, I was inspired to look into this yet again.  Looks like it is the
subject of this:
https://www.mail-archive.com/linux-btrfs@vger.kernel.org/msg40618.html

It doesn't look like this is in 3.18 yet.  So, I'm basically running
without trimming.

-- 
Rich

Re: [gentoo-user] Tips for fresh install with GRUB2+RAID1+LVM2

[Peter Humphrey]

On Tuesday 19 May 2015 10:53:26 Rich Freeman wrote:
> On Tue, May 19, 2015 at 10:44 AM, Peter Humphrey  
wrote:
> > Incidentally, what's the received wisdom on frequency of file-system
> > trimming on SSDs these days? I've seen values quoted between twice a day
> > and once a week. And how does trimming affect btrfs?
> 
> I've been trimming mine daily, and I've yet to be able to distinguish
> it from a no-op.  As far as I can tell fstrim -v always outputs 0
> bytes trimmed.

I've just run fstrim manually on my LAN server, which is installed on ext4:
# /sbin/fstrim -av
/usr/local: 0 B (0 bytes) trimmed
/usr/portage/packages: 71.4 MiB (74878976 bytes) trimmed
/usr/portage: 389.3 MiB (408174592 bytes) trimmed
/var/cache/http-replicator: 0 B (0 bytes) trimmed
/var/cache/squid: 41.5 MiB (43532288 bytes) trimmed
/home: 123.1 MiB (129081344 bytes) trimmed
/: 698.9 MiB (732839936 bytes) trimmed

It's supposed to have done that at 01:15 on Saturday, but my KMail system is 
sick so I can't say what it actually did. Roll on new SSDs!

-- 
Rgds
Peter

Re: [gentoo-user] Tips for fresh install with GRUB2+RAID1+LVM2

[Peter Humphrey]

On Tuesday 19 May 2015 10:53:26 Rich Freeman wrote:
> On Tue, May 19, 2015 at 10:44 AM, Peter Humphrey  
wrote:
> > Incidentally, what's the received wisdom on frequency of file-system
> > trimming on SSDs these days? I've seen values quoted between twice a day
> > and once a week. And how does trimming affect btrfs?
> 
> I've been trimming mine daily, and I've yet to be able to distinguish
> it from a no-op.  As far as I can tell fstrim -v always outputs 0
> bytes trimmed.

Ah, well that's quite different from my Atom box with its 64GB SSD; before I 
remove the -v a few weeks ago it was reporting many megabytes trimmed most 
times it ran. That's on ext4 and running Gentoo with http-replicator service.

-- 
Rgds
Peter

Re: [gentoo-user] Tips for fresh install with GRUB2+RAID1+LVM2

[Rich Freeman]

On Tue, May 19, 2015 at 10:44 AM, Peter Humphrey  wrote:
>
> Incidentally, what's the received wisdom on frequency of file-system trimming
> on SSDs these days? I've seen values quoted between twice a day and once a
> week. And how does trimming affect btrfs?
>

I've been trimming mine daily, and I've yet to be able to distinguish
it from a no-op.  As far as I can tell fstrim -v always outputs 0
bytes trimmed.

-- 
Rich

Re: [gentoo-user] Tips for fresh install with GRUB2+RAID1+LVM2

[Peter Humphrey]

On Tuesday 19 May 2015 08:54:26 Rich Freeman wrote:
> On Tue, May 19, 2015 at 6:13 AM, Neil Bothwick  wrote:
> > On Tue, 19 May 2015 10:02:38 +0100, Peter Humphrey wrote:
> >> > skip mdadm and lvm ... and try btrfs as you have the chance on shiny
> >> > new hardware
> >> 
> >> I also have a spare external hard disk, which I could experiment with
> >> for snapshots etc.
> > 
> > Snapshots are subvolumes in btrfs, so they stay in the same filesystem.
> > That's why they are so fast.
> > 
> > It's a similar situation with ZFS.
> 
> Yup.  In both cases they're copy-on-write, so they don't consume
> additional space except to the extent that things change.
> 
> Also, in both cases you can serialize a snapshot (either in its
> entirety or as a diff vs a previous snapshot) and store it on separate
> storage.  This is mainly done for backup (storing the serialized
> files) or replication (replaying them onto another server with the
> same filesystem).
> 
> But, neither ZFS nor btrfs are without issue on Linux, so I'd use care
> in a production environment.  The btrfs issues tend to revolve around
> stability, and the zfs issues tend to revolve around dealing with
> out-of-mainline code and legal/license issues.

Well, this is my toy desktop, so no risk to fame and fortune there. By /toy/, 
of course, I mean I play with it, not that it's a Mickey-Mouse setup (which 
some of you pros out there might think it is anyway, but that's another 
story).

Some people will remember that I had a fling with f2fs on my little Atom LAN 
server some months ago; I don't think I'll be using that this time!

Incidentally, what's the received wisdom on frequency of file-system trimming 
on SSDs these days? I've seen values quoted between twice a day and once a 
week. And how does trimming affect btrfs?

Hmm. Looks like I'm hijacking Nuno's thread. Apologies if that's ruffled any 
feathers, but I think I'm still on-topic, more or less, and he may still be 
interested in the conversation.

- 
Rgds
Peter

Re: [gentoo-user] Brother missed in cups listing

[Manuel Schönlaub]

Hi,

Did you install the correct driver from Brother? Gutenprint seems not to
have support for your printer atm. Has it worked ever before (e.g. it
stopped working after an upgrade of so?)

Regards,
MS
Am 19.05.2015 15:51 schrieb "Silvio Siefke" :

> Hello,
>
> i has a problem, my printer Brother MFC-7320 is not listed in cups when
> i add a printer. Not on my Acer Aspire and not on Dell Inspiron. One ok,
> maybe printer is defect, but on all laptops then something is not okay.
>
> Has someone an idea what is wrong now?
>
> Thank you & Nice Day
> Silvio
>
> /var/log/messages
> May 18 22:10:46 gentoomobile kernel: usb 3-1: new full-speed USB device
> number 6 using uhci_hcd
> May 18 22:10:47 gentoomobile kernel: usb 3-1: New USB device found,
> idVendor=04f9, idProduct=01eb
> May 18 22:10:47 gentoomobile kernel: usb 3-1: New USB device strings:
> Mfr=0, Product=0, SerialNumber=3
> May 18 22:10:47 gentoomobile kernel: usb 3-1: SerialNumber: 000M9N691511
> May 18 22:10:46 gentoomobile mtp-probe[3435]: checking bus 3, device 6:
> "/sys/devices/pci:00/:00:1d.1/usb3/3-1"
> May 18 22:10:46 gentoomobile mtp-probe[3435]: bus: 3, device: 6 was not an
> MTP device
>
> dmesg
> [ 8300.874141] usb 3-1: new full-speed USB device number 6 using uhci_hcd[
> 8301.025146] usb 3-1: New USB device found, idVendor=04f9, idProduct=01eb[
> 8301.025157] usb 3-1: New USB device strings: Mfr=0, Product=0,
> SerialNumber=3[ 8301.025163] usb 3-1:SerialNumber: 000M9N691511
>
> gentoomobile cups # uname -a
> Linux gentoomobile 4.0.4-ck1
>
> siefke ~ $  cat .src/kernel/linux-4.0.4/.config | grep USB_PRINTER
> # CONFIG_USB_PRINTER is not set
>
> Is has try with USB in kernel active and in cups deactivated and other
> way too. Nothing change.
>
>
> siefke ~ $  equery u cups | grep usb
> +usb
>
>
> # lsusb
> siefke /usr/portage/net-print/cups $  sudo lsusb
> Passwort:
> Bus 005 Device 001: ID 04f9:01eb Brother Industries, Ltd MFC-7320
>
>

[gentoo-user] Brother missed in cups listing

[Silvio Siefke]

Hello,

i has a problem, my printer Brother MFC-7320 is not listed in cups when
i add a printer. Not on my Acer Aspire and not on Dell Inspiron. One ok,
maybe printer is defect, but on all laptops then something is not okay.

Has someone an idea what is wrong now?

Thank you & Nice Day
Silvio 

/var/log/messages
May 18 22:10:46 gentoomobile kernel: usb 3-1: new full-speed USB device number 
6 using uhci_hcd
May 18 22:10:47 gentoomobile kernel: usb 3-1: New USB device found, 
idVendor=04f9, idProduct=01eb
May 18 22:10:47 gentoomobile kernel: usb 3-1: New USB device strings: Mfr=0, 
Product=0, SerialNumber=3
May 18 22:10:47 gentoomobile kernel: usb 3-1: SerialNumber: 000M9N691511
May 18 22:10:46 gentoomobile mtp-probe[3435]: checking bus 3, device 6: 
"/sys/devices/pci:00/:00:1d.1/usb3/3-1"
May 18 22:10:46 gentoomobile mtp-probe[3435]: bus: 3, device: 6 was not an MTP 
device

dmesg
[ 8300.874141] usb 3-1: new full-speed USB device number 6 using uhci_hcd[ 
8301.025146] usb 3-1: New USB device found, idVendor=04f9, idProduct=01eb[ 
8301.025157] usb 3-1: New USB device strings: Mfr=0, Product=0, SerialNumber=3[ 
8301.025163] usb 3-1:SerialNumber: 000M9N691511

gentoomobile cups # uname -a
Linux gentoomobile 4.0.4-ck1 

siefke ~ $  cat .src/kernel/linux-4.0.4/.config | grep USB_PRINTER
# CONFIG_USB_PRINTER is not set

Is has try with USB in kernel active and in cups deactivated and other
way too. Nothing change. 


siefke ~ $  equery u cups | grep usb
+usb


# lsusb
siefke /usr/portage/net-print/cups $  sudo lsusb
Passwort: 
Bus 005 Device 001: ID 04f9:01eb Brother Industries, Ltd MFC-7320



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Re: [gentoo-user] Tips for fresh install with GRUB2+RAID1+LVM2

[Rich Freeman]

On Tue, May 19, 2015 at 6:13 AM, Neil Bothwick  wrote:
> On Tue, 19 May 2015 10:02:38 +0100, Peter Humphrey wrote:
>
>> > skip mdadm and lvm ... and try btrfs as you have the chance on shiny
>> > new hardware
>>
>> I also have a spare external hard disk, which I could experiment with
>> for snapshots etc.
>
> Snapshots are subvolumes in btrfs, so they stay in the same filesystem.
> That's why they are so fast.
>
> It's a similar situation with ZFS.

Yup.  In both cases they're copy-on-write, so they don't consume
additional space except to the extent that things change.

Also, in both cases you can serialize a snapshot (either in its
entirety or as a diff vs a previous snapshot) and store it on separate
storage.  This is mainly done for backup (storing the serialized
files) or replication (replaying them onto another server with the
same filesystem).

But, neither ZFS nor btrfs are without issue on Linux, so I'd use care
in a production environment.  The btrfs issues tend to revolve around
stability, and the zfs issues tend to revolve around dealing with
out-of-mainline code and legal/license issues.

-- 
Rich

Re: [gentoo-user] Recommendations for WLAN-AP?

[Alec Ten Harmsel]

On 05/18/2015 06:47 PM, waben...@gmail.com wrote:
> Paul Tobias  wrote:
>
>> On 2 May 2015 at 17:17,  wrote:
>>
>>> Volker Armin Hemmann  wrote:
>>>
 tplink archer series?

 can cope with 20 laptops at the same time easily and is not too
 expensiv.
>>> Thanks Volker. I will have a look at it.
>>>
>>> --
>>> Regards
>>> wabe
>>>
>>>
>> Hi wabe, did you decide yet? You might find this article useful:
>> http://arstechnica.com/gadgets/2015/03/from-the-wirecutter-the-best-wi-fi-router-for-most-people-anyway/
>>
>> Before that article came out, I also arrived at the same conclusion:
>> the TP-Link Archer C7 v2 is the best for me. My requirements also
>> included OpenWRT support.
> Sorry for my late response, but I was on a holiday trip till last night.
>
> I never thought about using OpenWRT before I read your post, but I 
> wish I had. I already bought two ZyXEL NWA1123-AC. Unfortunately it 
> seems not possible to run OpenWRT on these devices. 
>
> I will call the dealer tomorrow. I hope that it is possible to exchange 
> the devices because I still have not opened the packagings.
>
> --
> Regards
> wabe
>


I'm a little late to the conversation, but my roommates and I use a $20
TP-LINK with DD-WRT as an AP because it has better wireless than my $100
Netgear router. The routing part of the TP-LINK isn't nearly as good
(chokes on more than 10 devices), but the Netgear for routing with the
TP-LINK for an AP is a perfect combo.

Alec

Re: [gentoo-user] Tips for fresh install with GRUB2+RAID1+LVM2

[Neil Bothwick]

On Tue, 19 May 2015 10:02:38 +0100, Peter Humphrey wrote:

> > skip mdadm and lvm ... and try btrfs as you have the chance on shiny
> > new hardware  
> 
> I also have a spare external hard disk, which I could experiment with
> for snapshots etc.

Snapshots are subvolumes in btrfs, so they stay in the same filesystem.
That's why they are so fast.

It's a similar situation with ZFS.


-- 
Neil Bothwick

Stop tagline theft! Copyright your tagline (c)


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Re: [gentoo-user] Tips for fresh install with GRUB2+RAID1+LVM2

[Peter Humphrey]

On Sunday 17 May 2015 21:36:57 Stefan G. Weichinger wrote:
> Am 2015-05-17 um 18:05 schrieb Peter Humphrey:
> > Maybe I will. I suspect dodgy disks and I have a pair of new SSDs on the
> > way. Perhaps it's time for a rethink.
> 
> perhaps one more thought to be thought right now:

(I overlooked this at the time.)

> skip mdadm and lvm ... and try btrfs as you have the chance on shiny new
> hardware

I also have a spare external hard disk, which I could experiment with for 
snapshots etc.

> less layers, more features ... I definitely recommend giving this a try.

I do like the idea of having fewer layers and less complication. I'm doing a 
bit of reading while awaiting the bits - the SSDs are here; all I need now is 
the mounting brackets.

> tl;dr ... maybe you listed some reason to stick with mdadm/lvm2/xfs etc
> ... sorry in that case

No, it's just what I have at the moment.

-- 
Rgds
Peter