Re: The state of blu-ray burning in linux is terrible
by Thomas Schmitt
Hi,
sorry for breaking the thread. I was not subscribed up to now
and did not yet find an archive that exposes message ids.
--------------------------------------------------------------
It is not that bad with Blu-ray. At least with the backends.
(I am the developer of libburn and use BD-R and BD-RE media daily.)
But wodim (or "cdrecord") out of cdrkit should really be used
only for CD.
The slowliness of BD media comes from their Defect Management
which checkreads the written blocks while they are still present
in the drive's buffer. In case of poor read quality the blocks
get written again or redirected to the Spare Area where the data
get stored in replacement blocks.
This checkreading reduces write speed to at most half of the
nominal speed of drive and BD medium.
BD-R do Defect Management by default if they are formatted.
BD-RE can only be used formatted and do Defect Management by default.
--------------------------------------------------------------
Original cdrecord out of cdrtools was already discussed in the this
thread. To my knowledge it is fast with BD-R, because it does not
format them. It is not fast with BD-RE, because it uses SCSI command
WRITE(10) which does not allow to override the slow Defect Management.
--------------------------------------------------------------
growisofs out of dvd+rw-tools has a little bug with BD-R.
https://bugzilla.redhat.com/show_bug.cgi?id=858029
https://bugzilla.redhat.com/show_bug.cgi?id=868527
It is supposed to be fixed in
dvd+rw-tools-7.1-13.fc19
The tiny patch is shown in
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=713016
Workaround is to explicitely format the BD-R before use by
dvd+rw-format /dev/sr0
or to use option
-use-the-force-luke=spare:none
when giving an unformatted BD-R to growisofs.
growisofs formats BD-R by default and then uses slow Defect
Management. This can be prevented by option
-use-the-force-luke=spare:none
growisofs has no means to prevent Defect Management on BD-RE media.
--------------------------------------------------------------
My own programs, libburn based cdrskin and xorriso, do not format
BD-R by default. So they are as fast as with cdrecord.
Other than with cdrecord it is possible to format BD-R on request
cdrskin -v dev=/dev/sr0 blank=format_if_needed
xorriso -outdev /dev/sr0 -format as_needed
which makes them capable of slow Defect Management.
Other than growisofs and cdrecord, cdrskin and xorriso offer the
opportunity to disable Defect Management on formatted BD-R and
on BD-RE
cdrskin stream_recording=on ...cdrecord-like-burn-options...
xorriso -stream_recording on ...xorriso-burn-commands...
This is especially helpful with 2x BD-RE, which elsewise need
an awfully long time to write their capacity of 22.5 GiB.
Have a nice day :)
Thomas
10 years, 10 months
Do I need avahi?
by Timothy Murphy
I recently noticed that I have been getting warnings
avahi-daemon[5884]: dbus-protocol.c:
Too many objects for client ':1.15', client request failed.
on my server.
I must admit I didn't know I was running avahi on the server.
I looked at a couple of avahi howtos,
and it seemed that for almost any usage other packages are required,
in particular nss-mdns .
If this is in fact required by avahi, it seems surprising
that it is not automatically installed at the same time.
(None of the examples of avahi usage actually worked on my system.)
But my real query is whether avahi (or zeroconf)
could actually offer me anything useful.
I'm running dhcpd on the server,
and I'm not looking for information about printers
or other users on my home network.
Also, is there any way of discovering who "client 1.15" is?
And is anything likely to go wrong if I simply "service avahi-daemon stop"?
--
Timothy Murphy
e-mail: gayleard /at/ eircom.net
tel: +353-86-2336090, +353-1-2842366
School of Mathematics, Trinity College, Dublin 2, Ireland
10 years, 10 months
Gnome classic working in F19?
by "Paul-Erik Törrönen"
Just want to check first if I am the only one having this problem with an
upgraded F19 setup.
Some background:
Upgraded the system from F18 (and previously from 17-16-15) with fedup
--network. Before the upgrade I was running Gnome fine in the classical
style (dropdown app menu, no hotspots, workspace grid on lower bar etc.).
After the upgrade logged on with Gnome Classic selected -> worked fairly
ok, I have a grey top and bottom bar. Logged out and in again in order to
get some additional settings (the workspace for both dual displays). After
the login (making sure that I still have the Gnome classic selected) the
top and bottom bars are not the same.
Specifically the bottom bar (where the running apps should be displayed as
well as the workspace app) is missing altogether and the top bar is now
the new Gnome-styled, ie. has the hotspot and no app-menu at all.
This is reproducable, if I log out from this state, select the normal
gnome session, then I (again) get the same new Gnome desktop as described
above, and after an additional logout + login with the Gnome Classic
selected, then I end back in the actual classic for that particular
session.
So it seems that the mode selection is not really working, and neither is
the selection remembered correctly.
Does this sound familiar to anyone?
Poltsi
--
Paul-Erik Törrönen "When science and the Bible differ,
poltsi(a)777-team.org science has obviously misinterpreted
+358 40 703 1231 its data"
http://poltsi.fi/ Henry Morris, father of 'modern creationism'
10 years, 10 months
Disable built-in WiFi card so that USB WiFi device gets used.
by Rolf Turner
I have a Toshiba Satellite L850 Laptop for which the WiFi card appears
to be incompatible
with any drivers available for Linux. To try to get around this problem
I recently purchased
a USB WiFi device: An ASUS USB-N110. They (ASUS) provide drivers which
one must
install. After a great deal of travail and fumbling around (the
instructions were both unclear
--- apparently written by someone for whom English was at best a *third*
language ---
and slightly misleading) I managed to get the device *partially* working.
The device appears to work immediately after boot-up but if I close the
lid of my laptop,
(which causes it to go into hibernation (???) mode) or if I log out and
log back in,
the WiFi connection gets lost. When I try to restore the connection it
seems to keep
trying to use the WiFi card that is built into the laptop rather than
the USB WiFi device.
(And the built-in device doesn't work; as I said, its drivers are
incompatible with Linux OSes.
Which is why I bought the USN-N10 in the first place.) The only way to
get the laptop to
make use of the USB WiFi device seems to be to shut down and restart.
This is unsatisfactory.
Is there any way to "disable" the (non-functional) built-in WiFi card so
that the laptop will
*not* try to use it but will rather go straight to the (functional) USB
device? I Googled around
a bit and found some instructions for disabling the built-in WiFi card
under Ubuntu, but
these instruction did not (as far as I could tell) mesh with the Fedora
system that I am
running. Can anyone tell me how to do what I want under Fedora?
If you reply, ***PLEASE*** be as clear and explicit as you possibly
can. I am not terribly
swift with OS matters. I know and understand ***some*** things, but
there are huge
lacunae in my knowledge.
I am running Fedora 17; output of "uname -a" is:
> Linux localhost.localdomain 3.3.4-5.fc17.x86_64 #1 SMP Mon May 7
> 17:29:34 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux
Thanks for any help that anyone can give me.
cheers,
Rolf Turner
10 years, 10 months
RE: VirtualBox wont run -
by Alan Gagne
> On 30/07/13 12:41, Steven Stern wrote:
> >/ If you're using the repo from virtualbox.org*, type
> />/
> />/ sudo /sbin/service vboxdrv setup
> />/
> />/ It will use DKMS to remove the virtual box drivers, recompile them for
> />/ the new kernel, and install them into the active kernel modules.
> />/
> />/ * This may apply to the Fedora repos but I'm not sure. I'm using the one
> />/ from virtualbox.org.Seehttps://www.virtualbox.org/wiki/Linux_Downloads <seehttps://www.virtualbox.org/wiki/Linux_Downloads>
> />/ and scroll down to RPM-based Linux distributions
> />/
> />/
> /
> This is a yum install but I will look into that.
>
> Bob
>
If you have DKMS installed it will automatically update the modules when
a new kernel
in installed. Works great for me.
From the doc referenced above.
*Note:*Users of Fedora/Mandriva might want to install the*dkms*package
(not available on openSUSE) to ensure that the VirtualBox host kernel
modules (/vboxdrv/,/vboxnetflt/and/vboxnetadp/) are properly updated if
the linux kernel version changes during the next kernel update.
Alan
10 years, 10 months
How to create launchers on panel in Gnome 3 Classic Mode?
by Eric Smith
Is there some way to create launchers on the Gnome 3 Classic Mode
panel, as was easily done in Gnome 2?
I'm trying really hard to like Gnome 3 Classic Mode, but having a very
difficult time of it, because it seems to only provide a superficial
resemblance to the Gnome 2 desktop, without actually providing
comparable functionality.
Eric
10 years, 10 months
Login messed up after upgrading kernel
by Junayeed Ahnaf
Hello,
I'm using Linux 3.10.x kernel and I have AMD proprietary graphics driver running akmod. The 3.9.9 kernel series was working fine until the latest update came.
Now I can't log in using the new kernel, tthe screen goes black and it logs itself out. I can't even log back in.
The older kernel is working flawlessly though. Any solution?
Junayeed Ahnaf Nirjhor
Software Engineer @ Hulu
Twitter @ Nirjhor
10 years, 10 months
Backup settings
by Martin S
There apprently is a backup service in Fedora, which can automatically copy
files to various "cloud-services" or other places. What is needed to be able to
add /var/log/yum.log to the files that are backed up.
The file is greyed out, and I can't select it. How do I solve this or should I
go for some other tool for this?
10 years, 10 months
Howto make Firewalld allow remote SSH into a Virtual Machine?
by Patrick Lists
Hi,
I just did a fresh F19 x86_64 install on my workstation, copied a
Virtual Machine to it and started the VM (has IP addr 192.168.122.20).
Now I would like to be able to ssh into the VM from another box on my
local LAN like my laptop. Thus far I can't make it work. Steps:
Opened firewall-config
Set the firewall zone of my Ethernet interface to Trusted:
Options -> Change Zone of Connections -> <interface> -> Edit -> General
-> Firewall zone -> Trusted
Click on the reload icon
Set the default zone to Trusted:
Options -> Change Default Zone -> Trusted
Click on the reload icon
Results:
Can not ping VM from laptop:
[patrick@laptop ~]$ ping 192.168.122.20
PING 192.168.122.20 (192.168.122.20) 56(84) bytes of data.
From 10.0.0.135 icmp_seq=1 Destination Port Unreachable
Can not ssh from the laptop to the VM:
[patrick@laptop ~]$ ssh 192.168.122.20
ssh: connect to host 192.168.122.20 port 22: Connection refused
On the workstation IPv4 forwarding is on:
$ cat /proc/sys/net/ipv4/ip_forward
1
So how do I make firewalld allow pings and ssh from remote hosts?
Thanks!
Patrick
10 years, 10 months
Camera panasonic-TZ18
by Patrick Dupre
Hello,
I connected my camera panasonic DMC-TZ18
Bus 001 Device 005: ID 04da:2372 Panasonic (Matsushita) Lumix Camera (Storage mode)
but it does not seem to be seen by the computer.
no camera been by digicam or shotwell.
Do I need to install some drivers?
Thank.
===========================================================================
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
===========================================================================
10 years, 10 months