Re: [gentoo-user] USB automount
Am 25.09.2012 18:49, schrieb Canek Peláez Valdés: On Tue, Sep 25, 2012 at 3:32 AM, Stefan G. Weichinger li...@xunil.at wrote: Am 25.09.2012 10:09, schrieb Stefan G. Weichinger: So if I don't use systemd right now, it would be better to keep consolekit? I give it a try now ... compiling stuff without that flag for a test. Did not work. Rather easy to understand, if neither systemd or consolekit is there, how should things work ... Re-enabled USE-flag consolekit for now, re-emerged 4 pkgs, ok now. Maybe I will try systemd again soon ... It's not only the use flag; if you set USE=systemd, you need to boot with systemd. Otherwise, set USE=consolekit -systemd. I think this should go into the wiki or so. I always assumed that adding the flag systemd just somehow enhanced my packages with systemd-compatibility and I could then simply switch between init-systems as I like. It wasn't clear to me that it somehow disabled stuff or made my binaries incompatible with eg. consolekit. For now I stay with my working openrc-based setup, I have other things to test and will only re-compile stuff for systemd when I find more time again. Thanks so far for your investigation on this bug, Stefan
Re: [gentoo-user] Problems with update
Am 26.09.2012 00:19, schrieb Silvio Siefke: Hello, i want run the update and emerge ever give message: gentoo-desk doxygen # emerge --update --newuse --deep --with-bdeps=y @world Calculating dependencies... done! !!! All ebuilds that could satisfy =gnome-base/gvfs-1.10.1[udisks,udev] have been masked. !!! One of the following masked packages is required to complete your request: - gnome-base/gvfs-1.14.0::gentoo (masked by: package.mask, ~x86 keyword) /usr/portage/profiles/package.mask: # Alexandre Rostovtsev tetrom...@gentoo.org (25 Sep 2012) # GNOME 3.6 mask # Core libraries to be unmasked first: - gnome-base/gvfs-1.12.3::gentoo (masked by: ~x86 keyword) - gnome-base/gvfs-1.12.2-r1::gentoo (masked by: ~x86 keyword) (dependency required by xfce-base/thunar-1.4.0[udev] [installed]) (dependency required by xfce-extra/thunar-volman-0.8.0 [installed]) (dependency required by @selected [set]) (dependency required by @world [argument]) For more information, see the MASKED PACKAGES section in the emerge man page or refer to the Gentoo Handbook. Try disabling the udisks useflag for gnome-base/gvfs
[gentoo-user] udev not reading the rules files
I udev problems after updating to udev 191 on an almost fresh install, then downgraded to 189 in order to match a working system. This was working before the latest upgrade cycle. The problem is most (not all !) device nodes getting root/root owner/group. So /dev/snd, /dev/video belongs to root and not the official groups. So any kind of desktop interaction (webcams, audio etc) fails unless its the root user. It appears that udev isnt reading the rules files - whilst on another much older system with 189 all is fine :( The guides I have found so far seem way out of date, even bugzilla. * sys-fs/udev Latest version available: 191 Latest version installed: 189 Size of downloaded files: 1,370 kB Homepage:http://www.freedesktop.org/wiki/Software/systemd Description: Linux dynamic and persistent device naming support (aka userspace devfs) License: LGPL-2.1 MIT GPL-2 * sys-fs/udev-init-scripts Latest version available: 16 Latest version installed: 16 Size of downloaded files: 4 kB Homepage:http://www.gentoo.org Description: udev startup scripts for openrc License: GPL-2 BillK
Re: [gentoo-user] udev not reading the rules files
On Wed, 26 Sep 2012 16:07:14 +0800, Bill Kenworthy wrote: The problem is most (not all !) device nodes getting root/root owner/group. So /dev/snd, /dev/video belongs to root and not the official groups. So any kind of desktop interaction (webcams, audio etc) fails unless its the root user. It appears that udev isnt reading the rules files - whilst on another much older system with 189 all is fine :( Have you tried running udevadm test on one of the affected nodes? For example % sudo udevadm info --name=/dev/video0 | grep '^P:' P: /devices/pci:00/:00:1c.3/:03:00.0/:04:01.0/video4linux/video0 % sudo udevadm test /devices/pci:00/:00:1c.3/:03:00.0/:04:01.0/video4linux/video0 [lots of output about rules being read and actions done] -- Neil Bothwick Quality control, n.: Assuring that the quality of a product does not get out of hand and add to the cost of its manufacture or design. signature.asc Description: PGP signature
Re: [gentoo-user] udev not reading the rules files
On Wed, 2012-09-26 at 09:36 +0100, Neil Bothwick wrote: On Wed, 26 Sep 2012 16:07:14 +0800, Bill Kenworthy wrote: The problem is most (not all !) device nodes getting root/root owner/group. So /dev/snd, /dev/video belongs to root and not the official groups. So any kind of desktop interaction (webcams, audio etc) fails unless its the root user. It appears that udev isnt reading the rules files - whilst on another much older system with 189 all is fine :( Have you tried running udevadm test on one of the affected nodes? For example % sudo udevadm info --name=/dev/video0 | grep '^P:' P: /devices/pci:00/:00:1c.3/:03:00.0/:04:01.0/video4linux/video0 % sudo udevadm test /devices/pci:00/:00:1c.3/:03:00.0/:04:01.0/video4linux/video0 [lots of output about rules being read and actions done] Brilliant! - worked and noticing the paths involved was the hint I needed. Turned out the old style init.d file for udev was present and had to be deleted before the emerge would replace it with the new one. I am wondering if sys-fs/udev-init-scripts-16 is doing something non-standard or has some bug as its not creating an update file (or whatever its called :) for etc-update and there are some errors in a compress routine ... will look further tomorrow. Thanks. BillK
Re: [gentoo-user] Problems with update
On Wed, 26 Sep 2012 09:54:40 +0200 Michael Hampicke gentoo-u...@hadt.biz wrote: Try disabling the udisks useflag for gnome-base/gvfs Have the prob is same. Why i must unmask gvfs, i understand it not. When i set autounmask=y and autounmask-write portage write this configuration: /etc/portage/package.use #required by sys-fs/cryptsetup-1.4.1[static], required by sys-fs/udisks-1.99.0-$ =sys-fs/lvm2-2.02.88 static-libs #required by sys-fs/cryptsetup-1.4.1[static], required by sys-fs/udisks-1.99.0-$ =dev-libs/libgcrypt-1.5.0-r2 static-libs #required by sys-fs/cryptsetup-1.4.1[static], required by sys-fs/udisks-1.99.0-$ =sys-apps/util-linux-2.21.2 static-libs #required by sys-fs/cryptsetup-1.4.1[static], required by sys-fs/udisks-1.99.0-$ =dev-libs/popt-1.16-r1 static-libs #required by sys-fs/cryptsetup-1.4.1[static], required by sys-fs/udisks-1.99.0-$ =dev-libs/libgpg-error-1.10 static-libs #required by xfce-base/thunar-1.4.0[udev], required by @selected, required by @$ =gnome-base/gvfs-1.12.3 udisks udev /etc/portage/package.accept_keywords #required by sys-fs/udisks-1.99.0-r1, required by gnome-base/gvfs-1.12.3[udisks], required by @selected, required by @world (argument) =sys-auth/polkit-0.107-r1 ~x86 #required by gnome-base/gvfs-1.12.3[udisks], required by @selected, required by @world (argument) =sys-fs/udisks-1.99.0-r1 ~x86 #required by x11-libs/vte-0.30.1-r3, required by dev-util/anjuta-3.2.2, required by @selected, required by @world (argument) =dev-libs/glib-2.32.4 ~x86 #required by sys-fs/udev-191[openrc], required by sys-fs/udisks-1.99.0-r1, required by gnome-base/gvfs-1.12.3[udisks], required by @selected, r$ =sys-fs/udev-init-scripts-16 ~x86 #required by sys-fs/udev-191, required by sys-fs/udev-init-scripts-16 =sys-apps/kmod-10 ~x86 #required by sys-apps/kmod-10[zlib], required by sys-fs/udev-191, required by sys-fs/udev-init-scripts-16 =sys-libs/zlib-1.2.7 ~x86 #required by xfce-base/thunar-1.4.0[dbus,xfce_plugins_trash], required by @selected, required by @world (argument) =gnome-base/gvfs-1.12.3 ~x86 #required by sys-fs/udisks-1.99.0-r1, required by gnome-base/gvfs-1.12.3[udisks], required by @selected, required by @world (argument) =dev-util/gdbus-codegen-2.32.4 ~x86 #required by sys-fs/udev-191[hwdb], required by sys-fs/udev-init-scripts-16 =sys-apps/hwids-20120922 ~x86 #required by sys-fs/udev-init-scripts-16 =sys-fs/udev-191 ~x86 #required by sys-auth/polkit-0.107-r1, required by sys-fs/udisks-1.99.0-r1, required by gnome-base/gvfs-1.12.3[udisks], required by @selected, $ =dev-lang/spidermonkey-1.8.5-r1 ~x86 I do not understand why Portage goes this way. I have in make.conf -static-libs. Now I have to put unmask and static-libs use. Rely primarily static-libs at the end require more and more programs. Where hides the error? Thank you for help. Silvio
[gentoo-user] Re: systemd question
On 09/25/2012 08:21 PM, Canek Peláez Valdés wrote: Do you need remote filesystem support? If not, then don't worry about it; but if you want to find the problem, send the output from systemctl status remote-fs.target. Mine is: # systemctl status remote-fs.target remote-fs.target - Remote File Systems Loaded: loaded (/usr/lib64/systemd/system/remote-fs.target; enabled) Active: active since Mon, 24 Sep 2012 18:33:09 -0500; 1 day and 3h ago Docs: man:systemd.special(7) I mount /usr/portage by nfs, so I do want remote-fs support. The problem is listed by journalctl: Sep 26 05:44:27 a6v rpc.statd[1658]: Running as root. chown /var/lib/nfs to choose different user Sep 26 05:44:27 a6v rpc.statd[1658]: failed to create RPC listeners, exiting Sep 26 05:44:27 a6v mount[1655]: mount.nfs: rpc.statd is not running but is required for remote locking. Sep 26 05:44:27 a6v mount[1655]: mount.nfs: Either use '-o nolock' to keep locks local, or start statd. Sep 26 05:44:27 a6v mount[1655]: mount.nfs: an incorrect mount option was specified Sep 26 05:44:27 a6v systemd[1]: usr-portage.mount mount process exited, code=exited status=32 Sep 26 05:44:27 a6v systemd[1]: Failed to mount /usr/portage. Sep 26 05:44:27 a6v systemd[1]: Dependency failed for Remote File Systems. Sep 26 05:44:27 a6v systemd[1]: Job remote-fs.target/start failed with result 'dependency'. Sep 26 05:44:27 a6v systemd[1]: Unit usr-portage.mount entered failed state. # systemctl status remote-fs.target remote-fs.target - Remote File Systems Loaded: loaded (/usr/lib64/systemd/system/remote-fs.target; enabled) Active: inactive (dead) Docs: man:systemd.special(7) # grep nfs /etc/fstab a6:/usr/portage /usr/portagenfs rw,auto 0 0 (BTW, this works correctly when booting with openrc.) Any hints would be much appreciated, thanks.
[gentoo-user] Re: OT: new printer suggestions?
Neil Bothwick neil at digimed.co.uk writes: I have a Brother MFC-7460DN network laser AIO. Both printing and scanning work fine, using modified ebuilds from b.g.o. Duplex printing also works as expected. So I started looking at the drivers at the bgo overlay, I did fine: brother-mfc-j265w-drivers-1 http://welcome.solutions.brother.com/bsc/public_s/id/linux/en/download_prn.html#DCP-J315W Is that the drive you used? How will I know it works with the printer I'm looking at? (MFC-J6710DW ) Will I have to hack an ebuild to get my specific printer to work? And I ended up here: http://welcome.solutions.brother.com/bsc/public_s/id/linux/en/download_prn.html#MFC-J6710DW Since I did not see a specific overlay for the MFC-J6710DB, I did browse the brother linux drivers here: http://welcome.solutions.brother.com/bsc/public_s/id/linux/en/download_prn.html So, I guess I'm looking for advice on rolling my own hacked ebuild for this brother printer, or did I miss how all Brother printers are supported on gentoo? Looking in CUPS, I did not see
Re: [gentoo-user] Re: OT: new printer suggestions?
On Wed, Sep 26, 2012 at 12:01 PM, James wirel...@tampabay.rr.com wrote: Neil Bothwick neil at digimed.co.uk writes: I have a Brother MFC-7460DN network laser AIO. Both printing and scanning work fine, using modified ebuilds from b.g.o. Duplex printing also works as expected. So I started looking at the drivers at the bgo overlay, I did fine: brother-mfc-j265w-drivers-1 http://welcome.solutions.brother.com/bsc/public_s/id/linux/en/download_prn.html#DCP-J315W Is that the drive you used? How will I know it works with the printer I'm looking at? (MFC-J6710DW ) Will I have to hack an ebuild to get my specific printer to work? And I ended up here: http://welcome.solutions.brother.com/bsc/public_s/id/linux/en/download_prn.html#MFC-J6710DW Since I did not see a specific overlay for the MFC-J6710DB, I did browse the brother linux drivers here: http://welcome.solutions.brother.com/bsc/public_s/id/linux/en/download_prn.html So, I guess I'm looking for advice on rolling my own hacked ebuild for this brother printer, or did I miss how all Brother printers are supported on gentoo? Looking in CUPS, I did not see For my Brother printers, having net-print/cups and net-print/foomatic-filters, is sufficient. I'm not doing anything with scanning or the like, though. Isn't there a page on one of the Gentoo wikis for this? At the very least, there's the printer compatibility database[1] at the Linux foundation. (Apparently, that's where linuxprinting.org went.) [1] http://www.linuxfoundation.org/collaborate/workgroups/openprinting/database/databaseintro -- :wq
Re: [gentoo-user] Re: systemd question
On Wed, Sep 26, 2012 at 8:11 AM, walt w41...@gmail.com wrote: On 09/25/2012 08:21 PM, Canek Peláez Valdés wrote: Do you need remote filesystem support? If not, then don't worry about it; but if you want to find the problem, send the output from systemctl status remote-fs.target. Mine is: # systemctl status remote-fs.target remote-fs.target - Remote File Systems Loaded: loaded (/usr/lib64/systemd/system/remote-fs.target; enabled) Active: active since Mon, 24 Sep 2012 18:33:09 -0500; 1 day and 3h ago Docs: man:systemd.special(7) I mount /usr/portage by nfs, so I do want remote-fs support. The problem is listed by journalctl: Sep 26 05:44:27 a6v rpc.statd[1658]: Running as root. chown /var/lib/nfs to choose different user Sep 26 05:44:27 a6v rpc.statd[1658]: failed to create RPC listeners, exiting Sep 26 05:44:27 a6v mount[1655]: mount.nfs: rpc.statd is not running but is required for remote locking. Sep 26 05:44:27 a6v mount[1655]: mount.nfs: Either use '-o nolock' to keep locks local, or start statd. Sep 26 05:44:27 a6v mount[1655]: mount.nfs: an incorrect mount option was specified Sep 26 05:44:27 a6v systemd[1]: usr-portage.mount mount process exited, code=exited status=32 Sep 26 05:44:27 a6v systemd[1]: Failed to mount /usr/portage. Sep 26 05:44:27 a6v systemd[1]: Dependency failed for Remote File Systems. Sep 26 05:44:27 a6v systemd[1]: Job remote-fs.target/start failed with result 'dependency'. Sep 26 05:44:27 a6v systemd[1]: Unit usr-portage.mount entered failed state. # systemctl status remote-fs.target remote-fs.target - Remote File Systems Loaded: loaded (/usr/lib64/systemd/system/remote-fs.target; enabled) Active: inactive (dead) Docs: man:systemd.special(7) # grep nfs /etc/fstab a6:/usr/portage /usr/portagenfs rw,auto 0 0 (BTW, this works correctly when booting with openrc.) Any hints would be much appreciated, thanks. I believe you have your answer: Sep 26 05:44:27 a6v mount[1655]: mount.nfs: rpc.statd is not running but is required for remote locking. Sep 26 05:44:27 a6v mount[1655]: mount.nfs: Either use '-o nolock' to keep locks local, or start statd. Put nolock in the mount options in fstab (rw,auto,nolock), or get rpc.statd running. For the later, you will need the service file for it: a quick googling turned out: http://en.gentoo-wiki.com/wiki/Systemd#NFS Put the necessary service files in /etc/systemd/system, make a link to them in /etc/systemd/system/remote-fs.target.wants (you need to do this by hand, since they don't seem to have an [Install] section), and then do a 'systemctl --system daemon-reload'. Afterwards, you should be able to mount your NFS partition with 'systemctl start usr-portage.mount'. Regards. -- Canek Peláez Valdés Posgrado en Ciencia e Ingeniería de la Computación Universidad Nacional Autónoma de México
Re: [gentoo-user] openmp flag
Am 25.09.2012 17:01, schrieb Michael Mol:
On Tue, Sep 25, 2012 at 10:42 AM, James wirel...@tampabay.rr.com wrote:
Hello,
background:
It seems there is a major push now to put openmp:
[1,2] into embedded systems [3].
So I looked at these [4] packages to find something
interesting to look deeper into related to openMP.
Blender immediately jumped out at me as a good example,
cause an old friend Ken Hughes is, imho, one of the
world's most amazing C programmers, and a stalwart at
the blender project.
OK, here's the question, I went to emerge blender
and found that the openmp flag is already set. {?}
Yet I looked everywhere and did not see the openmp flag
set (/etc/make.conf, /etc/portage/package.use)
so where is it getting set on my AMD workstation?
[ebuild N ] media-gfx/blender-2.49b-r2 USE=ffmpeg
nls ogg openmp -blender-game -openal -verse
I feel like I should know (profiles etc) but, I'm a little
bit brain_dead this am, so any help is appreciated.
Packages can choose to have USE flags enabled or disabled for them by
default. So blender likely has openmp enabled by default, without that
affecting any other packages.
OH, anyone is encouraged to chime in about openmp
and your thoughts as to it's viability and usefulness.
Do you believe it will become a core technology,
embedded into GCC? Used widely?
If you can use it, use it. OpenMP is little more than a set of
extensions to C (and C++) which allows the normally-scalar language to
do some things in a parallel fashion without resorting to the costs of
multithreading. This is good, because vector instructions have been
available in x86 since MMX came out, and improvements to the vector
instructions available to x86 still goes on.
I guess this is just poorly phrased but to clarify: OpenMP *does* use
multithreading and nothing else. It does not, in any way, make more use
of vector instructions than GCC without -fopenmp. I guess what you mean
is avoiding the costs of *manual* multithreading using POSIX threads and
the like.
If you want to use vector instructions for your own code, you should
look into compiler intrinsics (i.e. vector instructions as built-in C
functions).
http://ds9a.nl/gcc-simd/
And, just to nit-pick: OpenMP also works for Fortran.
Related are CUDA and OpenCL, which are two other systems for
parallelizing code. CUDA assumes you have access to an nVidia GPU (and
have a CUDA-enabled driver installed). OpenCL is a big more generic,
and supports dispatching to CUDA, CPU vector instructions or even
thread pools.
Personally, my recommendation is to enable everything you can get
working (be it, OpenMP, CUDA or OpenCL); vector processing is going to
be generally more efficient than scalar processing. You don't need to
worry about which is better unless you're a software developer. (And
if you're a software developer, go study up on their differences;
tradeoffs happen.)
+1
By the way: Did anyone get good results out of dev-util/intel-ocl-sdk
for OpenCL? Some time ago I tested it with a package that supported both
OpenMP and OpenCL (not sure which) and OpenCL didn't really make an
impact on my Core i5.
Regards,
Florian Philipp
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Re: [gentoo-user] openmp flag
On Wed, Sep 26, 2012 at 2:25 PM, Florian Philipp li...@binarywings.net wrote:
Am 25.09.2012 17:01, schrieb Michael Mol:
On Tue, Sep 25, 2012 at 10:42 AM, James wirel...@tampabay.rr.com wrote:
Hello,
background:
It seems there is a major push now to put openmp:
[1,2] into embedded systems [3].
So I looked at these [4] packages to find something
interesting to look deeper into related to openMP.
Blender immediately jumped out at me as a good example,
cause an old friend Ken Hughes is, imho, one of the
world's most amazing C programmers, and a stalwart at
the blender project.
OK, here's the question, I went to emerge blender
and found that the openmp flag is already set. {?}
Yet I looked everywhere and did not see the openmp flag
set (/etc/make.conf, /etc/portage/package.use)
so where is it getting set on my AMD workstation?
[ebuild N ] media-gfx/blender-2.49b-r2 USE=ffmpeg
nls ogg openmp -blender-game -openal -verse
I feel like I should know (profiles etc) but, I'm a little
bit brain_dead this am, so any help is appreciated.
Packages can choose to have USE flags enabled or disabled for them by
default. So blender likely has openmp enabled by default, without that
affecting any other packages.
OH, anyone is encouraged to chime in about openmp
and your thoughts as to it's viability and usefulness.
Do you believe it will become a core technology,
embedded into GCC? Used widely?
If you can use it, use it. OpenMP is little more than a set of
extensions to C (and C++) which allows the normally-scalar language to
do some things in a parallel fashion without resorting to the costs of
multithreading. This is good, because vector instructions have been
available in x86 since MMX came out, and improvements to the vector
instructions available to x86 still goes on.
I guess this is just poorly phrased but to clarify: OpenMP *does* use
multithreading and nothing else. It does not, in any way, make more use
of vector instructions than GCC without -fopenmp. I guess what you mean
is avoiding the costs of *manual* multithreading using POSIX threads and
the like.
Fair point.
If you want to use vector instructions for your own code, you should
look into compiler intrinsics (i.e. vector instructions as built-in C
functions).
http://ds9a.nl/gcc-simd/
Personally, I don't like compiler intrinsics; they're specific to
given compilers. I've tended to write code which is supposed to
compile on multiple compilers. (There's a world outside GCC...)
And, just to nit-pick: OpenMP also works for Fortran.
True; this slipped my mind. :)
Related are CUDA and OpenCL, which are two other systems for
parallelizing code. CUDA assumes you have access to an nVidia GPU (and
have a CUDA-enabled driver installed). OpenCL is a big more generic,
and supports dispatching to CUDA, CPU vector instructions or even
thread pools.
Personally, my recommendation is to enable everything you can get
working (be it, OpenMP, CUDA or OpenCL); vector processing is going to
be generally more efficient than scalar processing. You don't need to
worry about which is better unless you're a software developer. (And
if you're a software developer, go study up on their differences;
tradeoffs happen.)
+1
By the way: Did anyone get good results out of dev-util/intel-ocl-sdk
for OpenCL? Some time ago I tested it with a package that supported both
OpenMP and OpenCL (not sure which) and OpenCL didn't really make an
impact on my Core i5.
Haven't tried it, no. I've got a Radeon 6870, and I can only have one
OpenCL driver loaded at a time. (IBM has a middleman driver which
supports dispatching to multiple backends, but I believe its a for-pay
package.)
--
:wq
Re: [gentoo-user] Re: OT: new printer suggestions?
On Wed, Sep 26, 2012 at 9:15 AM, Michael Mol mike...@gmail.com wrote: For my Brother printers, having net-print/cups and net-print/foomatic-filters, is sufficient. I'm not doing anything with scanning or the like, though. Michael, Are you saying that you were able to print to your brother printers by more or less following these steps: 1. buy a computer, install gentoo 2. buy a brother printer, plug it into computer via usb 3. emerge net-print/cups and net-print/foomatic-filters 4. Visit the local cups webpage, add new printer, select brother 5. print Notably missing from my list is a visit to brother's website (or any other website) to download drivers/binaries/confs/etc. Thank you, Chris
[gentoo-user] OT: shot an XFS-filesystem, oh my
I had an XFS-filesystem within a KVM-VM (32 bit Gentoo, so it isn't that off-topic, btw ;-) ) ... and I did a lot of work within that filesystem over the last 2 days. Unfortunately it ran full so I decided to shutdown the VM, use qemu-img to resize that image-file (raw format), reboot the VM ... and deleted the partition /dev/vdb1 (virtio ...) and recreated vdb1 with the full size of the underlying image-file. XFS doesn't like that. Now I lost my xfs-superblock and xfs_check/xfs_repair tell me that they find candidates for 2nd superblock but can't decide to actually use them :-( The XFS-fs was fine before, unmounted correctly ... I am googling and trying ... does anyone have a hint on this? If I lose it, OK. No backup (ok, maybe one from a week ago ... without the latest work of today), but it was mostly a pulled git-repo I worked with. I got the generated binaries and have the learned steps documented so I can live with it. But it would be great to somehow get that stuff online again. Thanks, greets, Stefan
Re: [gentoo-user] Re: OT: new printer suggestions?
On Wed, 26 Sep 2012 16:01:05 + (UTC), James wrote: I have a Brother MFC-7460DN network laser AIO. Both printing and scanning work fine, using modified ebuilds from b.g.o. Duplex printing also works as expected. So I started looking at the drivers at the bgo overlay, I did fine: brother-mfc-j265w-drivers-1 http://welcome.solutions.brother.com/bsc/public_s/id/linux/en/download_prn.html#DCP-J315W Is that the drive you used? How will I know it works with the printer I'm looking at? (MFC-J6710DW ) I looked at the Brother site to find the driver to use, then looked at the wiki and bgo and found an ebuild for the previous model, which I edited to use the drivers for my printer. -- Neil Bothwick Love and Trust: Oral sex between cannibals. signature.asc Description: PGP signature
Re: [gentoo-user] OT: new printer suggestions?
Have you checked EPSON as an option?
Re: [gentoo-user] Re: OT: new printer suggestions?
On Wed, Sep 26, 2012 at 4:13 PM, Chris Stankevitz chrisstankev...@gmail.com wrote: On Wed, Sep 26, 2012 at 9:15 AM, Michael Mol mike...@gmail.com wrote: For my Brother printers, having net-print/cups and net-print/foomatic-filters, is sufficient. I'm not doing anything with scanning or the like, though. Michael, Are you saying that you were able to print to your brother printers by more or less following these steps: 1. buy a computer, install gentoo 2. buy a brother printer, plug it into computer via usb 3. emerge net-print/cups and net-print/foomatic-filters 4. Visit the local cups webpage, add new printer, select brother 5. print Notably missing from my list is a visit to brother's website (or any other website) to download drivers/binaries/confs/etc. More or less. The Brother printers happen to be attached to a Debian box, but the Gentoo box doesn't require any additional drivers in order to feed the content to the Debian box over IPP. (And the Debian box isn't doing any PCL-Brother or PostScript-Brother translation.) -- :wq
Re: [gentoo-user] openmp flag
Am 26.09.2012 21:46, schrieb Michael Mol:
On Wed, Sep 26, 2012 at 2:25 PM, Florian Philipp li...@binarywings.net
wrote:
Am 25.09.2012 17:01, schrieb Michael Mol:
On Tue, Sep 25, 2012 at 10:42 AM, James wirel...@tampabay.rr.com wrote:
Hello,
background:
It seems there is a major push now to put openmp:
[1,2] into embedded systems [3].
So I looked at these [4] packages to find something
interesting to look deeper into related to openMP.
Blender immediately jumped out at me as a good example,
cause an old friend Ken Hughes is, imho, one of the
world's most amazing C programmers, and a stalwart at
the blender project.
OK, here's the question, I went to emerge blender
and found that the openmp flag is already set. {?}
Yet I looked everywhere and did not see the openmp flag
set (/etc/make.conf, /etc/portage/package.use)
so where is it getting set on my AMD workstation?
[ebuild N ] media-gfx/blender-2.49b-r2 USE=ffmpeg
nls ogg openmp -blender-game -openal -verse
I feel like I should know (profiles etc) but, I'm a little
bit brain_dead this am, so any help is appreciated.
Packages can choose to have USE flags enabled or disabled for them by
default. So blender likely has openmp enabled by default, without that
affecting any other packages.
OH, anyone is encouraged to chime in about openmp
and your thoughts as to it's viability and usefulness.
Do you believe it will become a core technology,
embedded into GCC? Used widely?
If you can use it, use it. OpenMP is little more than a set of
extensions to C (and C++) which allows the normally-scalar language to
do some things in a parallel fashion without resorting to the costs of
multithreading. This is good, because vector instructions have been
available in x86 since MMX came out, and improvements to the vector
instructions available to x86 still goes on.
I guess this is just poorly phrased but to clarify: OpenMP *does* use
multithreading and nothing else. It does not, in any way, make more use
of vector instructions than GCC without -fopenmp. I guess what you mean
is avoiding the costs of *manual* multithreading using POSIX threads and
the like.
Fair point.
If you want to use vector instructions for your own code, you should
look into compiler intrinsics (i.e. vector instructions as built-in C
functions).
http://ds9a.nl/gcc-simd/
Personally, I don't like compiler intrinsics; they're specific to
given compilers. I've tended to write code which is supposed to
compile on multiple compilers. (There's a world outside GCC...)
Yes. I haven't used it, either. I guess you could autoconf it and
replace it with vanilla C macros in most cases. Or as an easier
solution: #ifdef a vanilla C implementation together with the vector
code. Bonus points for added readability.
Kind of makes you wonder how well GCC can vectorize programs on its own
when you lay out your code in a way suitable for its own intrinsics
without actually using them.
And, just to nit-pick: OpenMP also works for Fortran.
True; this slipped my mind. :)
Related are CUDA and OpenCL, which are two other systems for
parallelizing code. CUDA assumes you have access to an nVidia GPU (and
have a CUDA-enabled driver installed). OpenCL is a big more generic,
and supports dispatching to CUDA, CPU vector instructions or even
thread pools.
Personally, my recommendation is to enable everything you can get
working (be it, OpenMP, CUDA or OpenCL); vector processing is going to
be generally more efficient than scalar processing. You don't need to
worry about which is better unless you're a software developer. (And
if you're a software developer, go study up on their differences;
tradeoffs happen.)
+1
By the way: Did anyone get good results out of dev-util/intel-ocl-sdk
for OpenCL? Some time ago I tested it with a package that supported both
OpenMP and OpenCL (not sure which) and OpenCL didn't really make an
impact on my Core i5.
Haven't tried it, no. I've got a Radeon 6870, and I can only have one
OpenCL driver loaded at a time. (IBM has a middleman driver which
supports dispatching to multiple backends, but I believe its a for-pay
package.)
Isn't that what app-admin/eselect-opencl is for? I mean simple
switching, not dual application (which would be awesome, too).
Regards,
Florian Philipp
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Re: [gentoo-user] Re: OT: new printer suggestions?
To add to the list of recommendations, I have used Lexmark lasers (mono and color) for a long time and been very happy with them. They work with standard PostScript drivers out of the box, with duplex support for those models that have it. Their inkjets are crap, but then again they all are; i don't use ink jet printers at all. On Sep 24, 2012 6:15 PM, Peter Humphrey pe...@humphrey.ukfsn.org wrote: On Monday 24 September 2012 18:45:29 James wrote: So now I'll have to think about all of this some more HP printers have worked for me for over 14 years with linux, unix and bsd systems.. I just cannot find an HP printer that fits my previously described needs... I may just get 2 for less than 500.00 as the HP 7000 officejet does handle the large 11x17 (A3 ledger) paper.. thanks to all for the input; other can still make some suggestions. I don't remember what you said you wanted, but I have a Kyocera FS1020-D mono laser which has performed faultlessly these last five years or so. It has a duplexer which also is driven properly. I also have a next-to useless HP D4260 inkjet. It purports to work properly but it's used so seldom that I can't get an even ink deposition. HTH. -- Rgds Peter
Re: [gentoo-user] openmp flag
On Wed, Sep 26, 2012 at 5:03 PM, Florian Philipp li...@binarywings.net wrote: Am 26.09.2012 21:46, schrieb Michael Mol: On Wed, Sep 26, 2012 at 2:25 PM, Florian Philipp li...@binarywings.net wrote: Am 25.09.2012 17:01, schrieb Michael Mol: On Tue, Sep 25, 2012 at 10:42 AM, James wirel...@tampabay.rr.com wrote: [snip] If you want to use vector instructions for your own code, you should look into compiler intrinsics (i.e. vector instructions as built-in C functions). http://ds9a.nl/gcc-simd/ Personally, I don't like compiler intrinsics; they're specific to given compilers. I've tended to write code which is supposed to compile on multiple compilers. (There's a world outside GCC...) Yes. I haven't used it, either. I guess you could autoconf it and replace it with vanilla C macros in most cases. Or as an easier solution: #ifdef a vanilla C implementation together with the vector code. Bonus points for added readability. And the added maintenance, doubling the number of builds to test. :) Kind of makes you wonder how well GCC can vectorize programs on its own when you lay out your code in a way suitable for its own intrinsics without actually using them. [snip] By the way: Did anyone get good results out of dev-util/intel-ocl-sdk for OpenCL? Some time ago I tested it with a package that supported both OpenMP and OpenCL (not sure which) and OpenCL didn't really make an impact on my Core i5. Haven't tried it, no. I've got a Radeon 6870, and I can only have one OpenCL driver loaded at a time. (IBM has a middleman driver which supports dispatching to multiple backends, but I believe its a for-pay package.) Isn't that what app-admin/eselect-opencl is for? I mean simple switching, not dual application (which would be awesome, too). Dual-application is the circumstance IBM handles. Including dispatching over the network. :) -- :wq
[gentoo-user] trouble with custom keyboard shortcuts in gnome 3.4
My new install is gnome 3.4, which is running pretty well. I am having trouble with an (important-to-me) custom keyboard shortcut. I am an emacs user so changed many of the shortcuts to use the Windows key, i.e. super. This works Super+Up moves to the workspace above, etc. However, I have had 2 custom keyboards with previous gnome's Super+T gnome-terminal Super+E emacs This does not work. Pressing Super+T gives t, Super+E gives e. However if I set the shortcuts to be alt+T gnome-terminal alt+e emacs it works fine. However, I can't give up alt+T and alt+e as they are used in emacs. thanks, allan
Re: [gentoo-user] OT: shot an XFS-filesystem, oh my
On 09/26/2012 04:13 PM, Stefan G. Weichinger wrote: I had an XFS-filesystem within a KVM-VM (32 bit Gentoo, so it isn't that off-topic, btw ;-) ) ... and I did a lot of work within that filesystem over the last 2 days. Unfortunately it ran full so I decided to shutdown the VM, use qemu-img to resize that image-file (raw format), reboot the VM ... and deleted the partition /dev/vdb1 (virtio ...) and recreated vdb1 with the full size of the underlying image-file. XFS doesn't like that. That won't work with any filesystem. I think instead of that last step, you should have booted to a livecd and used GParted to resize the partition. I went through this once: http://michael.orlitzky.com/articles/resizing_a_kvm_or_qemu_disk_image.php That won't help you get your stuff back but it might help out the next time. There's proprietary software that can scan the disk for the deleted partition. They used to be included on Hiren's Boot CD circa 9.0, but you could easily waste a few hours screwing around with it. If there was nothing critical and nobody else has any clever ideas, you're probably better off reinstalling. You should cherish the times you trash something non-critical.
Re: [gentoo-user] trouble with custom keyboard shortcuts in gnome 3.4
On Wed, Sep 26, 2012 at 5:21 PM, Allan Gottlieb gottl...@nyu.edu wrote: My new install is gnome 3.4, which is running pretty well. I am having trouble with an (important-to-me) custom keyboard shortcut. I am an emacs user so changed many of the shortcuts to use the Windows key, i.e. super. This works Super+Up moves to the workspace above, etc. Be aware that Super+Up, Super+Left, and Super+Right work for maximize, mazimize to the left, and maximize to the right. However, I have had 2 custom keyboards with previous gnome's Super+T gnome-terminal Super+E emacs This does not work. Pressing Super+T gives t, Super+E gives e. However if I set the shortcuts to be alt+T gnome-terminal alt+e emacs it works fine. However, I can't give up alt+T and alt+e as they are used in emacs. Known bug: https://bugzilla.gnome.org/show_bug.cgi?id=659899 https://bugzilla.gnome.org/show_bug.cgi?id=655615 Basically, GNOME Shell treats the Super key as special, and sometimes shortcuts binded to it fail. It is a bug, however, and devs are discussing how to handle it. In the mean time, may I recommend trying: Ctrl+Alt+e - Emacs Ctrl+Alt+t - Terminal It is not optimal, and the bug should be fixed. But it has a workaround. Regards. -- Canek Peláez Valdés Posgrado en Ciencia e Ingeniería de la Computación Universidad Nacional Autónoma de México
Re: [gentoo-user] trouble with custom keyboard shortcuts in gnome 3.4
On Wed, Sep 26, 2012 at 9:11 PM, Canek Peláez Valdés can...@gmail.com wrote: On Wed, Sep 26, 2012 at 5:21 PM, Allan Gottlieb gottl...@nyu.edu wrote: My new install is gnome 3.4, which is running pretty well. I am having trouble with an (important-to-me) custom keyboard shortcut. I am an emacs user so changed many of the shortcuts to use the Windows key, i.e. super. This works Super+Up moves to the workspace above, etc. Be aware that Super+Up, Super+Left, and Super+Right work for maximize, mazimize to the left, and maximize to the right. However, I have had 2 custom keyboards with previous gnome's Super+T gnome-terminal Super+E emacs This does not work. Pressing Super+T gives t, Super+E gives e. However if I set the shortcuts to be alt+T gnome-terminal alt+e emacs it works fine. However, I can't give up alt+T and alt+e as they are used in emacs. Known bug: https://bugzilla.gnome.org/show_bug.cgi?id=659899 https://bugzilla.gnome.org/show_bug.cgi?id=655615 Basically, GNOME Shell treats the Super key as special, and sometimes shortcuts binded to it fail. It is a bug, however, and devs are discussing how to handle it. In the mean time, may I recommend trying: Ctrl+Alt+e - Emacs Ctrl+Alt+t - Terminal It is not optimal, and the bug should be fixed. But it has a workaround. Regards. BTW, it can be done with an extension (according to the bug) using global.display.add_keybinding(). I haven't wrote any GNOME Shell extension, but I've heard it's not difficult. Regards. -- Canek Peláez Valdés Posgrado en Ciencia e Ingeniería de la Computación Universidad Nacional Autónoma de México
Re: [gentoo-user] Re: OT: new printer suggestions?
On Wed, Sep 26, 2012 at 1:45 PM, Michael Mol mike...@gmail.com wrote: More or less. Hrm. I have the same printer and I had to visit brother's website and download some kind of binary to get it working. I was hoping to emerge cups and have it just work but that was not the case for me. Then again I don't even know what is PCL, IPP, PostScript, foomatic, hplip, ppds, etc. Chris
