Re: [gentoo-user] [OT} CPU question
2015-07-14 0:04 GMT+08:00 meino.cra...@gmx.de: Hi, I am on the way to decide for a tablet PC (7) to use it as a platform for installing Linux (preferred: Gentoo!) on it and compile software for it for usage of decoding shortwave audio transmissions (i.e. morse code, sstv, etc.) for example. I mean this NOT performance wise or anything else than the technical possibility to painless compile linux software on this CPU, so... Is an Intel Atom Z3745 (quad core) a sane decision? Are crosscompilers freely available for it (or is this CPU even i386 compatible) (tablet: Asus MEMO Pad 7(ME176CX)) Thank you very much in advance for any help ! Best regards, Meino many device with Z3745 uses 32bit UEFI firmware, so you have to use 32bit UEFI loader and enable mixed mode to load 64bit kernel from 32bit bootloader
Re: [gentoo-user] xen: How to enable a non-existant USE flag? (xen doesn't work)
On Tue, 14 Jul 2015 20:44:36 -0400, Fernando Rodriguez wrote: app-emulation/xen-tools -hvm Note the -, you are negating the mask. the syntax if perfectly logical if you think about it with the right kind of logic. It is perfectly logical, it just don't follow the same convention used for masking/unmasking packages. I did look at the man page but I just did a quick search for .unmask It does make sense, as you are removing the mask. Of course, there may be a very good reason why this flag is masked on no-multilib profiles, in which case you will not only see why but get to keep the resulting shrapnel. In this case, judging by the bug report on the ChangeLog, I think the issue was fixed and they forgot to unmask the use flag. In that case, if it works with the flag for you, you should file a bug report to request the mask's removal. -- Neil Bothwick Our bikinis are exciting. They are simply the tops. pgpeKLuqvKt6k.pgp Description: OpenPGP digital signature
Re: [gentoo-user] xen: How to enable a non-existant USE flag? (xen doesn't work)
On Wed, Jul 15, 2015 at 12:33:26PM +0100, Neil Bothwick wrote: ebuilds are only shell scripts, not magic spells. Such blasphemy! -- wraeth wra...@wraeth.id.au GnuPG Key: B2D9F759 signature.asc Description: Digital signature
Re: [gentoo-user] SOLVED xen hvm USE flag disabled (xen: How to enable a non-existant USE flag? (xen doesn't work))
Am 14.07.2015 um 19:31 schrieb Fernando Rodriguez: On Tuesday, July 14, 2015 11:55:46 AM hw wrote: Hi, now I found this: moonflo ~ # find /usr/portage/profiles/ -type f -print0 | xargs -0 -P24 grep xen-tools [...] /usr/portage/profiles/ChangeLog-2007: Add hvm USE flag for Xen HVM support in xen-tools. Mask on no-multilib [...] And: http://gentoo-en.vfose.ru/wiki/Xen If you plan to add hvm support on amd64, you will need to have multilib support. Of course, I don't have multilib. Is that still required, and if so, why? There isn't any 32bit software to run other than within HVM guests perhaps. How can I remove this mask? I do need xen working last week ... It's in /usr/portage/profile/amd64/no-multilib/use.mask, I can't figure out how to unmask it on /etc/portage. What I would do is copy the xen-tools ebuild to your local overlay then run: sed -ie '/hvmloader/! s/hvm/hvm2/g' xen-tools-4.5.1-r1.ebuild and enable hvm2 and hvm, that way it doesn't get overwritten when you sync and when the ebuid gets updated and the mask removed you already have the right flags set. Should I make a bug report about it? I would comment on bug #351648 because it looks like they fixed it but forgot to remove the mask. Hm, I'm not sure what to make of this bug. I switched profile to one that doesn't say 'no-multilib', and the flag became available. However, I could not compile xen-tools with hvm because stub-32.h was missing. So I ended up re-installing the server to a different profile and finally got it to work. I'm thinking about making an entry about this problem to the wiki if I have some time at the weekend.
Re: [gentoo-user] xen doesn't work
Am 14.07.2015 um 20:56 schrieb hydra: Actually PV guests are not that hard at all. Well, how do you do that? Soon I want to do some Gentoo installations on this server. Can I just start with HVM and switch over to PV once the installation is done? However, you don't have hvm/qemu enabled so that's why your HVM guests won't start up. Indeed that was the problem. Once I found that out, I finally was able to get it to work. It's quite frustrating when you follow the documentation and yet things just don't work for unknown reasons.
Re: [gentoo-user] Securely deletion of an HDD
On Tue, Jul 14, 2015 at 6:21 PM, R0b0t1 r03...@gmail.com wrote: On Sun, Jul 12, 2015 at 7:18 PM, Rich Freeman ri...@gentoo.org wrote: I think that assumes that the two get averaged together in some way and cannot be separated. If you could determine the orientation of individual magnetic domains it is possible that you might be able to determine which ones are which. For example, if in a given location you found 90% of the grains had one orientation, and 10% had another, you might be able to infer that the 10% was the previous value of that location. Every bit on the disk will have this ghost inverse behind it. If you flip bits at random - what overwriting the drive with random data effectively does - then it's impossible to tell which ones were flipped recently and which ones were flipped before the last write. If a disk head moves across a track and lays down a pattern of magnetic fields, I imagine that the intensity of those fields will vary with distance from the head. If the head makes a second pass writing a different pattern of magnetic fields following a path not identical to the first, I imagine that those field intensities will also vary with distance from the head, but particles on ones die of the track will probably retain more of the former pattern and particles on the other side of the track would tend to retain more of the second pattern. I'm just not seeing anything that suggests that such an attack is physically impossible. It might be impractical today. It might be impractical forever. However, impossible is a very high bar to clear. Whether somebody with a technical capability so advanced that it is so debatable today fits within your threat model is a different story. Clearly these techniques are not available commercially/etc. If you're afraid of the NSA and you have unencrypted data on a disk in the first place they've probably already defeated your security in 100 different ways already. So, I'll agree there is a practical argument to be made. However, I can't really agree that something is physically impossible unless you can prove it from first principles. -- Rich
Re: [gentoo-user] xen: How to enable a non-existant USE flag? (xen doesn't work)
Am 14.07.2015 um 22:47 schrieb Neil Bothwick: On Tue, 14 Jul 2015 22:12:09 +0200, Alan McKinnon wrote: You override profiles in /etc/portage/profile. In this case add cat/pkg - hvm to package.use.mask. man portage for more information ha, I had tried (among other things) package.use.unmask following the convention used by package.mask/unmask. Thanks. The directory is: package.unmask Read man portage. The answer you seek is there. That's for unmasking packages, he wants to unmask USE flags. My previous post got a bit mucked up, set from my phone. to clarify, add a line to /etc/portage/profile/use.mask like this app-emulation/xen-tools -hvm Note the -, you are negating the mask. the syntax if perfectly logical if you think about it with the right kind of logic. Everything will be logical when you apply the right kind of logic ;) Of course, there may be a very good reason why this flag is masked on no-multilib profiles, in which case you will not only see why but get to keep the resulting shrapnel. I would say it is wrong to disable this flag in the first place, especially so without giving any warning, like when emerging xen-tools, that that flag is required for hardware virtualisation. The same goes for other flags which are alike as well. Then, why doesn't the xen-tools package pull in /all/ required dependencies (like whatever provides stub-32.h) for hvm, like it pulls in quite a few other packages already. Maybe give a warning that some are packages you would otherwise not have with a no-multilib profile. That would be much better than forcing users to re-install just to get hvm with xen-tools. Maybe I'll add that to the bug report.
[gentoo-user] Re: Securely deletion of an HDD
On 2015-07-15, wirel...@tampabay.rr.com wirel...@tampabay.rr.com wrote: In my impetuous youth, The first time I got to work under an old ATT unix license, we had several heated debates with nerds from DC and Jersey. turns out I was right; you could kill an phone switch with a single shot (and old att 3Bx series). Back in the 80s I worked for a company that made/sold radio-telephony mobile and base station equipment (which is basically a PBX connected to a bank of radio transceivers instead of phone sets). They had more than a few systems installed in various Central and South American countries during the 60s and 70s (the worse the standard copper infrastructure, the more important mobile phones tended to be). The field service guys told me that a not uncommon failure mode for the base station equipment was bullet holes. It turns out that one of the first things you do during a coup in a small central/south american county is take over or disable the radio-telphone base stations. [Back then the base stations were much higher power and covered much larger areas than a cellular base station does these days.] -- Grant Edwards grant.b.edwardsYow! Is something VIOLENT at going to happen to a gmail.comGARBAGE CAN?
Re: [gentoo-user] xen doesn't work
On Wed, Jul 15, 2015 at 12:46 PM, hw h...@gartencenter-vaehning.de wrote: Am 14.07.2015 um 20:56 schrieb hydra: Actually PV guests are not that hard at all. Well, how do you do that? Soon I want to do some Gentoo installations on this server. Can I just start with HVM and switch over to PV once the installation is done? From a running system lvm partitions are created for the virtual machine, then you mount those partitions, unpack stage3 on them, chroot and follow the same way as with installing a normal machine. You need to enable this when compiling the kernel. However, you don't have hvm/qemu enabled so that's why your HVM guests won't start up. Indeed that was the problem. Once I found that out, I finally was able to get it to work. It's quite frustrating when you follow the documentation and yet things just don't work for unknown reasons. Maybe try to modify the wiki for others to know?
Re: [gentoo-user] Re: Securely deletion of an HDD
On 07/13/2015 10:10 AM, Grant Edwards wrote: With regards to the other replies: I think physical destruction is unnecessary, and I don't really want to go through the trouble. If it's trouble rather than fun, then you're doing it wrong. :) Brilliant statement:: Others favor a high-powered rifle or an 8lb sledge. In my impetuous youth, The first time I got to work under an old ATT unix license, we had several heated debates with nerds from DC and Jersey. turns out I was right; you could kill an phone switch with a single shot (and old att 3Bx series). I took out a .338 with a questionable round and one shot turned off 3 out of 4 drives and most of the processors. The a_holes went back to their agency; and I lost some very valuable potential clients. But Grant is most correct!; if it ain't fun why fork with it? I did become great friends with some folks from the jersey labs.. cheers! James
[gentoo-user] [~amd64] Does the EGL useflag break mesa-progs-8.2.0?
Normally I would just file a bug report, but lately portage has been behaving so strangely I feel obligated to ask here first. Maybe you won't see what I see. Just try emerging mesa-progs-8.2.0 with the EGL useflag set.
[gentoo-user] Re: Securely deletion of an HDD
Grant Edwards grant.b.edwards at gmail.com writes: It turns out that one of the first things you do during a coup in a small central/south american county is take over or disable the radio-telphone base stations. [Back then the base stations were much higher power and covered much larger areas than a cellular base station does these days.] Yep:: Then when I got my first research lab, guess what was our first 'Big Donation' ? A semi trailer full of every make of those old att unix systems; from 3B2's own up the ladder to working switchgear. We wiped them clean and put Mt. Xinu unix (BSD) on them just to tick off the att folks Funny thing was they just kept giving us more and more equipment... Kids now a days do not get to play with the 'toys' we did in college. At poker flats [1] we got to shoot off rockets into the ionosphere. Try that one today The father of the modern rocket [2] taught my son Multi-Variable Calculus Small world when you get down to it Want to see the latest in Mach 7 guns? cheers! James [1] http://www.pfrr.alaska.edu/ [2] http://motherboard.vice.com/blog/lebanons-forgotten-space-race-in-1961-manoug-manougian-aimed-the-middle-east-at-the-stars
Re: [gentoo-user] [~amd64] Does the EGL useflag break mesa-progs-8.2.0?
On Wed, Jul 15, 2015 at 01:53:50PM -0700, walt wrote: Normally I would just file a bug report, but lately portage has been behaving so strangely I feel obligated to ask here first. Maybe you won't see what I see. Just try emerging mesa-progs-8.2.0 with the EGL useflag set. Attempting to compile =x11-apps/mesa-progs-8.2.0[egl,-gles1,-gles2] I got: Makefile:489: recipe for target 'eglut.lo' failed make: *** [eglut.lo] Error 1 Makefile:489: recipe for target 'eglut_screen.lo' failed make: *** [eglut_screen.lo] Error 1 libtool: compile: x86_64-pc-linux-gnu-gcc -DPACKAGE_NAME=\mesa-demos\ -DPACKAGE_TARNAME=\mesa-demos\ -DPACKAGE_VERSION=\8.2.0\ -DPACKAGE_STRING=\mesa-demos 8.2.0\ -DPACKAGE_BUGREPORT=\https://bugs.freedesktop.org/enter_bug.cgi?product=Mesacomponent=Demos\; -DPACKAGE_URL=\\ -DPACKAGE=\mesa-demos\ -DVERSION=\8.2.0\ -DSTDC_HEADERS=1 -DHAVE_SYS_TYPES_H=1 -DHAVE_SYS_STAT_H=1 -DHAVE_STDLIB_H=1 -DHAVE_STRING_H=1 -DHAVE_MEMORY_H=1 -DHAVE_STRINGS_H=1 -DHAVE_INTTYPES_H=1 -DHAVE_STDINT_H=1 -DHAVE_UNISTD_H=1 -DHAVE_DLFCN_H=1 -DLT_OBJDIR=\.libs/\ -DHAVE_LIBGLUT=1 -DHAVE_FREEGLUT=1 -DDEMOS_DATA_DIR=\../data/\ -DDEMOS_DATA_DIR=\../data/\ -I. -I/usr/include/libdrm -march=native -O2 -pipe -fomit-frame-pointer -c eglut_x11.c -o libeglut_x11_la-eglut_x11.o /dev/null 21 make: Leaving directory '/var/tmp/portage/x11-apps/mesa-progs-8.2.0/work/mesa-demos-8.2.0/src/egl/eglut' * ERROR: x11-apps/mesa-progs-8.2.0::gentoo failed (compile phase): * emake failed -- wraeth wra...@wraeth.id.au GnuPG Key: B2D9F759 signature.asc Description: Digital signature
Re: [gentoo-user] Virtualbox-5.0.0 [wow!]
On Tuesday, July 14, 2015 6:53:43 PM walt wrote: Even while slogging through my painful and ongoing update of perl and friends, I managed to install Virtualbox-5.0.0 and its guest-additions. (Apparently these two packages don't depend on perl at build-time.) I fired up my vbox gentoo guest machine and, of course, I tried to install the 5.0.0 guest additions kernel modules. I got an error message about usb support in the guest kernel, so I disabled guest usb support (temporarily) with the vbox gui, tried again and the guest kernel modules installed with amazing speed. I'd like to know if anyone else is seeing spectacular speed performance with vbox-5.0.0. No noticeable performance improvement for me using hardware virtualization. The USB issue is because it no longer pulls the extension pack or additions packages as a dependency so you need to add them to your world file. It also fails to compile for me with doc or sdk flags. -- Fernando Rodriguez
Re: [gentoo-user] xen: How to enable a non-existant USE flag? (xen doesn't work)
On Wed, 15 Jul 2015 12:42:00 +0200, hw wrote: Of course, there may be a very good reason why this flag is masked on no-multilib profiles, in which case you will not only see why but get to keep the resulting shrapnel. I would say it is wrong to disable this flag in the first place, especially so without giving any warning, like when emerging xen-tools, that that flag is required for hardware virtualisation. The same goes for other flags which are alike as well. If it doesn't work without multilib, it doesn't work without multilib - adding a USE flag will not change that. But masking the USE flag will at least stop you trying to use it without multilib. ebuilds are only shell scripts, not magic spells. -- Neil Bothwick The best antiques are old friends. pgp4m51QCDAoW.pgp Description: OpenPGP digital signature
