Registar
Página 1 de 2 12 ÚltimoÚltimo
Resultados 1 a 15 de 18

Tópico: Linux Kernel

  1. #1
    Tech Membro Avatar de Filipe
    Registo
    Jun 2014
    Local
    127.0.0.1
    Posts
    655
    Avaliação
    0

    Linux Kernel

    Meus caros amigos já saiu a ultima versão estável do kernel para sistemas linux.



    Linux Kernel 4.1 Released, This Is What’s New

    What’s New In Linux 4.1?


    linux kernel 4 1
    Tux got mail
    The sub-heading is on your lips and we’re not here simply to serve up an announcement of an announcement.


    We’ve gone through the (vast, long, lengthy and at times technically unintelligible) change-log to pick out some highlights that may not feed hyperbole but may impact on you, a desktop users.


    Power Improvements
    The big headline user-facing feature you’ll find in Linux 4.1 are the wealth of performance and power efficiency improvements committed for Intel’s Cherry Trail and Bay Trail chips. SoCs and devices, such as the Intel Compute Stick.


    Anecdotal suggestions are that Linux Kernel 4.1 gives select combinations of newer Intel hardware as much as an extra hour of battery life. Such high gains are not likely to apply to anything but a very specific sub-set of chips and systems (and high-end ones at that) but it’s still exciting to hear of.


    Highlights of Linux 4.1 include:


    EXT4 gains file-system level encryption (thanks to Google)
    Logitech lg4ff driver improves ‘force feedback’ for gaming wheels
    Toshiba laptop driver gains USB sleep charging and backlight improvements
    Rumble support for Xbox One controller
    Better battery reporting in Wacom tablet driver
    Various misc. power improvements for both ARM and x86 devices
    Samsung Exynos 3250 power management improvements
    Support for the Bamboo Pad
    Lenovo OneLink Pro Dock gains USB support
    Support for Realtek 8723A, 8723B, 8761A, 8821 Wi-Fi cards
    Donwload aqui: https://www.kernel.org/
    Ubuntu: http://kernel.ubuntu.com/~kernel-ppa/mainline/
    Stable: 4.1.6
    Mainline: 4.2
    Última edição de Filipe : 06-09-15 às 21:43
    List of Public DNS Servers! - Internet Censurada? Tenta alterar o DNS.
    aqui como testares o teu DNS!


  2. #2
    Tech Ubër-Dominus Avatar de Jorge-Vieira
    Registo
    Nov 2013
    Local
    City 17
    Posts
    30,005
    Avaliação
    1 (100%)
    AMD issues new Linux drivers



    Still a few problems

    AMD has released new Linux drivers for the upcoming Linux 4.2 kernel.

    The drivers include the new "AMDGPU" kernel driver which succeeds the "Radeon" DRM kernel driver.
    For those who came in late this is part of AMD's long talked about new Linux driver architecture for supporting the latest GPUs and all future GPUs.
    However the drivers are missing some important things. The new open-source AMDGPU Linux code works for Tonga/Carrizo GPUs but it doesn't support the latest R9 Fury "Fiji" GPUs.
    It lacks re-clocking/DPM for Tonga GPUs which will mean that these will have lower performance. Clearly there are stability issues under high-load OpenGL apps/games.
    According to Slashdot, Linux users need to get the code into a working state with the latest kernel and forked versions of Mesa, libdrm, new proprietary microcode files, and the new xf86-video-amdgpu user-space driver. Not someone new to Linux would want to do.
    With Linux for games getting more important, AMD is going to have to pull finger on this.
    Noticia:
    http://www.fudzilla.com/news/graphic...-linux-drivers
    http://www.portugal-tech.pt/image.php?type=sigpic&userid=566&dateline=1384876765

  3. #3
    Tech Membro Avatar de Filipe
    Registo
    Jun 2014
    Local
    127.0.0.1
    Posts
    655
    Avaliação
    0
    Qual será o dia em que a AMD consegue criar uns drivers decentes para linux.
    List of Public DNS Servers! - Internet Censurada? Tenta alterar o DNS.
    aqui como testares o teu DNS!


  4. #4
    Tech Ubër-Dominus Avatar de Jorge-Vieira
    Registo
    Nov 2013
    Local
    City 17
    Posts
    30,005
    Avaliação
    1 (100%)
    GeForce GTX 980 Ti: The Best For Linux Gamers

    The alternative OS gurus at Phoronix say that the best GPU out there right now for Linux gamers is the GeForce GTX 980 Ti.


    For the past few weeks I've been extensively testing the NVIDIA GeForce GTX 980 Ti on Linux and it's been a rather pleasant experience. Compared to the troubles with the R9 Fury on Catalyst Linux, the GTX 980 Ti has been a pleasant experience and yielding terrific results, assuming you're okay with using NVIDIA's proprietary driver.
    Noticia:
    http://www.hardocp.com/news/2015/08/...s#.VczRppf0OTQ
    http://www.portugal-tech.pt/image.php?type=sigpic&userid=566&dateline=1384876765

  5. #5
    Tech Ubër-Dominus Avatar de Jorge-Vieira
    Registo
    Nov 2013
    Local
    City 17
    Posts
    30,005
    Avaliação
    1 (100%)
    IBM puts a Tux on its mainframes with LinuxOne

    Mainframes may seem like dinosaurs at first glance these days, but IBM's big iron is still evolving. The company introduced its first exclusively Linux-based mainframes yesterday under the LinuxOne umbrella. LinuxOne systems are meant to allow businesses to host their Linux infrastructure on IBM's high-performance, high-availability mainframe hardware.




    Companies can pick from three distros. Red Hat and SUSE Enterprise Linux flavors have been available for mainframes for some time, and they're already compatible with LinuxOne systems. IT departments can also choose their preferred "runtime, hypervisor, database, analytics and cloud management tools." IBM is partnering with Canonical to bring Ubuntu to its mainframes as a third open-source option.
    Big Blue has also contributed some of its predictive IT analytics code to the Linux Foundation, which is creating an "Open Mainframe Project" to "advance development and adoption of Linux on the mainframe."
    Mainframe hardware doesn't look like a commodity x86 server at all. The LinuxOne Emperor (like emperor penguins, get it?), based on IBM's z13 mainframe, can be configured with up to 32 8-core, 5GHz z13 microprocessors. All that processing power is backed with up to 10TB of memory, and up to 320 lanes of PCI Express expansion. The Emperor can host up to 8,000 virtual machines or "hundreds of thousands" of Docker containers. A smaller LinuxOne Rockhopper is also available for businesses that want to get their toes into the Linux-on-the-mainframe waters without committing to the Emperor.
    Noticia:
    http://techreport.com/news/28844/ibm...-with-linuxone
    http://www.portugal-tech.pt/image.php?type=sigpic&userid=566&dateline=1384876765

  6. #6
    Tech Ubër-Dominus Avatar de Jorge-Vieira
    Registo
    Nov 2013
    Local
    City 17
    Posts
    30,005
    Avaliação
    1 (100%)
    Direct3D Takes First Steps In Wine 1.7.50

    It's been a long wait. Over six years, in fact, for Wine to implement Direct3D 11 in some form. It's finally here, though, in its first baby-steps.

    The WINE tool for Linux, which is a Windows Emulator, has finally shown its first signs of Direct3D 11 support in the new 1.7.50 release.
    Yes, first signs. The announcement that the developers were going to implement Direct3D 11 support came a while back, and while there is now Direct3D 11 support, it is in a very basic form. This means that there isn't full support yet, and not all the features have yet been implemented. Therefore, not all Direct3D 11 software is supported as of now. The full release notes are available here.
    Additionally, the new release includes the new Gecko engine based on Firefox 40, improved font matching in DirectWrite, added support for OpenMP when run on ARM platforms, and a heap of bugfixes.
    It should be noted that Direct3D does not equal DirectX. Direct3D is part of DirectX, which handles the hardware access layer. It is therefore the most crucial component of the graphics API, but even full Direct3D support doesn't mean that all DirectX 11 applications will run perfectly. In the wine emulator, for various items that are completely implemented there is software that doesn't run smoothly.
    While we wait for the developers to continue their work, you can download the new version of WINE 1.7.50 here from SourceForge, and start playing around with it. If you're looking for software that runs well, or want to contribute to the WINE community, you can help out by testing different software and letting people know how it runs at the WineHQ AppDB.
    Noticia:
    http://www.tomshardware.com/news/dir...750,29906.html
    http://www.portugal-tech.pt/image.php?type=sigpic&userid=566&dateline=1384876765

  7. #7
    Tech Ubër-Dominus Avatar de Jorge-Vieira
    Registo
    Nov 2013
    Local
    City 17
    Posts
    30,005
    Avaliação
    1 (100%)
    AMD's open source Fury disappointing



    At least for now

    AMD's open source drivers for its Fury platform have proved rather disappointing.

    According to Phoronix, open-source AMD driver code for supporting the Radeon R9 Fury graphics cards is to be merged into the coming Linux 4.3 kernel.
    The Radeon R9 Fury support is for the first GPUs with High Bandwidth Memory and includes support for graphics, SDMA, UVD video decoding, VCE video encoding, and other core functionality.
    But already with Linux 4.3 kernel, there will not be any re-clocking / power management support. Fury support is being tacked onto the new AMDGPU kernel driver added in Linux 4.2 and there remains no support for power management on discrete GPUs.
    Phoronix tested AMD's experimental open-source driver – obviously this took a bit of fiddling to ensure you have all the necessary AMD Fiji microcode/firmware files downloaded and placed within /lib/firmware/amdgpu.
    Apparently the driver only works on OpenGL 3.0 while the rest of the hardware on the RadeonSI driver supports OpenGL 4.1.
    Their reviewer was not that impressed saying that he wasted $600 on the graphics card, but so far it's been a disappointment.
    "I cannot recommend any Linux user buy an R9 Fury/Nano until either the Catalyst driver is much-improved or until GL4+re-clocking is working and in the mainline code-bases for Fiji. At least by the time that happens, the cards should be cheaper," he muttered.
    Noticia:
    http://www.fudzilla.com/news/graphic...-disappointing


    Nada de novo, AMD e Linux não dá mesmo...
    http://www.portugal-tech.pt/image.php?type=sigpic&userid=566&dateline=1384876765

  8. #8
    Tech Iniciado
    Registo
    Oct 2015
    Posts
    22
    Avaliação
    0
    NVIDIA também não colabora nada. Uso intel e funciona bastante bem mas pq não preciso de mais poder gráfico. Para quem joga é mais complicado, precisa de ter sorte e de acender umas velinhas para que funcione. Vejam o video do Linus a falar sobre a nvidia: https://www.youtube.com/watch?v=IVpOyKCNZYw

  9. #9
    Tech Mestre Avatar de Sonas
    Registo
    Feb 2013
    Posts
    5,601
    Avaliação
    9 (100%)
    Que Lord este senhor hahhaaha


    Sent from my iPhone using Tapatalk
    PC: Intel i7 4790k@4.5Ghz | Asus Ranger Z97 | EVGA 980ti ACX | 2 x 8GB FuryX | SSD: Crucial 500gb + Samsung 250gb| Phanteks Entho Pro | Seasonic X-1250w
    Monitores: Acer XB270HU 27" 1440p@144hz G-Sync | Dell U2414H 1080p@60hz

  10. #10
    Tech Ubër-Dominus Avatar de Jorge-Vieira
    Registo
    Nov 2013
    Local
    City 17
    Posts
    30,005
    Avaliação
    1 (100%)
    Linux update brings Skylake



    Reworked Nvidia support

    The new stable Linux kernel is out there supporting Intel’s Skylake and a reworked open source support platform for Nvidia graphics cards.

    Kernel 4.3 is the sequel to the existing 4.2 and weighs in with nearly an extra million lines of code. In fact the next version, tentatively titled 4.4, is estimated to have 21 million lines of code. These are huge increases given that Linux started out as super small.
    More than 70 percent of the changes are to drivers, while just 10 percent are architectural. Linux can now support AMD R9 Fury graphics chips and there are SMP scheduler optimisations and fixes to the file system.
    Supreme Linux Darlek Linus Torvalds said this upgrade had a few problems on its x86 vm86 mode which had to be fixed at the last minute.
    "The vm86 mode thing was a one-liner... it was slightly more nerve-racking because it looked scarier than it was before people figured out what was going on."
    Top contributors to the kernel are Red Hat with 5.9 percent of commits, Intel with 5.32 and the Linux Foundation itself at 3.14 (they deserve a Pi). Suse, Linaro, Texas Instruments and Samsung are also high on the list. Surprisingly Canonical, the company behind Ubuntu, didn't crack the top 10 contributors on this occasion.
    The next release, version 4.4, is set to be a long-term support release, which you can expect to see headed into the next generation of Linux flavours.
    Noticia:
    http://www.fudzilla.com/news/process...brings-skylake
    http://www.portugal-tech.pt/image.php?type=sigpic&userid=566&dateline=1384876765

  11. #11
    Tech Ubër-Dominus Avatar de Jorge-Vieira
    Registo
    Nov 2013
    Local
    City 17
    Posts
    30,005
    Avaliação
    1 (100%)
    AMD Crimson Performance Gains on Linux are Disappointing


    AMD recently overhauled the Catalyst Control Center software suite and created a more visually appealing design entitled, “Crimson”. Furthermore, the latest driver includes a whole host of new features and optimization enhancements. If you’d like to know more, feel free to check out our full review here. While Crimson is receiving an overwhelmingly positive reception from Windows users, it appears the performance gains on Linux are minimal. The highly revered Linux-based site, Phoronix decided to test the driver’s performance using a number of GPUs. As you can see from the image, Linux users still have to use the outdated user-interface but this was expected:

    The original press slides from AMD proclaimed there would be “Linux performance improvements” from “112% to 155%”. However, Phoronix’s testing shows a complete lack of progress and in some cases the update driver actually performs worse. Here we can see the performance differences between the 15.9 and 15.11 drivers. Honestly, the results are within a margin of error and nowhere near the 112% to 155% percent gains AMD promised. Obviously, this can improve via future driver revisions but this doesn’t look promising for Linux users on AMD hardware. Please note, this just one example, and Phoronix’s benchmarks show a similar pattern throughout various games.

    I hope this is just an isolated incident due to AMD’s completely reworked driver package. Whatever the case, it seems like you’re not going to see huge fps boosts at this current time.
    Have you upgraded to the Crimson Radeon software yet? If so, let us know what you think of it.
    Noticia:
    http://www.eteknix.com/amd-crimson-p...disappointing/


    Já era tempo de AMD conseguir fazer uma coisa decente para Linux
    http://www.portugal-tech.pt/image.php?type=sigpic&userid=566&dateline=1384876765

  12. #12
    Tech Ubër-Dominus Avatar de Jorge-Vieira
    Registo
    Nov 2013
    Local
    City 17
    Posts
    30,005
    Avaliação
    1 (100%)
    You Can Break Into a Linux System by Pressing Backspace 28 Times. Here’s How to Fix It

    1
    Hitting a key over and over again actually works for once. Two security researchers in Spain recently uncovered a strange bug that will let you into most Linux machines just by hitting the backspace key 28 times. Here’s how to fix it and keep your data protected.
    The researchers, Hector Marco and Ismael Ripoll from the Cybersecurity Group at Polytechnic University of Valencia, found that it’s possible to bypass all security of a locked-down Linux machine by exploiting a bug in the Grub2 bootloader. Essentially, hitting backspace 28 times when the machine asks for your username accesses the “Grub rescue shell,” and once there, you can access the computer’s data or install malware. Fortunately, Marco and Ripoll have made an emergency patch to fix the Grub2 vulnerability. Ubuntu, Red Hat, and Debian have all issued patches to fix it as well.
    Linux is often thought of as a super secure operating system, but this is a good reminder to take physical security just as seriously as network security (if not more). Take extra care when your machine is around people you don’t know, especially if your system has sensitive data on it.
    Noticia:
    http://lifehacker.com/you-can-break-...ace-1748370796
    http://www.portugal-tech.pt/image.php?type=sigpic&userid=566&dateline=1384876765

  13. #13
    Tech Ubër-Dominus Avatar de Jorge-Vieira
    Registo
    Nov 2013
    Local
    City 17
    Posts
    30,005
    Avaliação
    1 (100%)
    Intel Xeon E3 1245 v5 Linux Benchmarks

    In continuation of last week's article about building an Intel Xeon E3 v5 Skylake Linux system, here are my complete performance figures on the Xeon E3-1245 v5 as a $300 Skylake processor featuring HD Graphics P530.
    In that earlier article about the Skylake Xeon system build, I shared benchmarks comparing the performance of this brand new system against dozens of other systems used for benchmarking at Phoronix Media. The Xeon E3-1245 v5 was doing great and in this article are more raw performance benchmarks comparing it to other Skylake and Haswell hardware, including some power and performance-per-dollar metrics.
    As a reminder, the Xeon E3 1245 v5 is a quad-core processor with Hyper Threading to yield eight threads. The base frequency of this newly-launched CPU is 3.5GHz with a turbo frequency of 3.9GHz. This 80 Watt TDP processor also features Intel HD Graphics P530, has an 8MB cache, and supports the other features common to Intel's Skylake processors. This processor sells for just over $300 USD.
    The motherboard used for the Xeon E3 1245 v5 system was a Supermicro X11SAE-M with Intel C236 chipset and has been working out fine under Linux.
    Over the week of testing this Intel Xeon system so far, my only gripe has been about the HD Graphics P530 Linux support as it wasn't baked quite in time for Linux distributions to ship for providing a pleasant out-of-the-box experience. With Ubuntu, workarounds were needed to drive the display and to upgrade to Linux 4.3+ if you want accelerated graphics and working mode-setting. Fedora 23 doesn't yet have support for the HD Graphics P530 and CentOS 7 1511 also goes without the graphics support. But on the processor side, everything has been smooth sailing.
    The processors used for this comparison against my lone Skylake Xeon system included:
    - Intel Core i5 6600K Skylake
    - Intel Core i5 6500 Skylake
    - Intel Pentium G4400 Skylake
    - Intel Xeon E5 2687W v3 Haswell
    - Intel Core i7 5960X Haswell-E
    They are just a selection of modern Intel processors I had available for testing. In the earlier Xeon Skylake system build article is a more diverse range of Intel and AMD systems tested if interested. All of these Haswell/Skylake systems were running Ubuntu 15.10 with the Linux 4.4 kernel, Mesa 11.2-devel, and the GCC 5.2.1 compiler.
    Before getting to this long article, consider joining Phoronix Premium to enjoy all of our content ad-free while being able to view each article on a single page.
    Toda a review:
    http://www.phoronix.com/scan.php?pag...n-1245v5&num=1
    http://www.portugal-tech.pt/image.php?type=sigpic&userid=566&dateline=1384876765

  14. #14
    Tech Ubër-Dominus Avatar de Jorge-Vieira
    Registo
    Nov 2013
    Local
    City 17
    Posts
    30,005
    Avaliação
    1 (100%)
    Tessellation Support Expands for Intel's Open Linux Driver

    The open-source driver for Intel is known to be a little behind on Linux. Because Intel does not provide as much support as they should, the driver still does not support OpenGL 4.0, although that is changing. One large chunk of that API is support for tessellation, which comes from DirectX 11, and recent patches are adding it for supported hardware. Proprietary drivers exist, at least for some platforms, but they have their own issues.

    According to the Phoronix article, once the driver succeeds in supporting OpenGL 4.0, it will not be too long to open the path to 4.2. Tessellation is a huge hurdle, partially because it involves adding two whole shading stages to the rendering pipeline. Broadwell GPUs were recently added, but a patch that was committed yesterday will expand that to Ivy Bridge and Haswell. On Windows, Intel is far ahead -- pushing OpenGL 4.4 for Skylake-based graphics, although that platform only has proprietary drivers. AMD and NVIDIA are up to OpenGL 4.5, which is the latest version.
    While all of this is happening, Valve is working on an open-source Vulkan driver for Intel on Linux. This API will be released adjacent to OpenGL, and is built for high-performance graphics and compute. (Note that OpenCL is more sophisticated than Vulkan "1.0" will be on the compute side of things.) As nice as it would be to get high-end OpenGL support, especially for developers who want a more simplified structure to communicate to GPUs with, Vulkan will probably be the API that matters most for high-end video games. But again, that only applies to games that are developed for it.
    Noticia:
    http://www.pcper.com/news/Graphics-C...n-Linux-Driver
    http://www.portugal-tech.pt/image.php?type=sigpic&userid=566&dateline=1384876765

  15. #15
    Tech Ubër-Dominus Avatar de Jorge-Vieira
    Registo
    Nov 2013
    Local
    City 17
    Posts
    30,005
    Avaliação
    1 (100%)
    Serious bug in Linux kernel allows for privilege escalation

    The security team at Perception Point has uncovered a serious bug in the Linux kernel that could allow a regular user to get elevated permissions on an affected system. The vulnerability affects the Linux kernel versions 3.8 and higher.
    The bug lies in the code that implements Linux's keyrings facility, which is "primarily a way for drivers to retain or cache security data, authentication keys, encryption keys, and other data." To exploit the bug, an attacker has to make 232 requests to the keyring service, until an internal 32-bit counter rolls back to zero. After that, the attacker can trigger a use-after-free vulnerability to run arbitrary code with elevated privileges.
    Besides a substantial number of Linux systems, the security researchers also point out that an estimated 66% of Android devices are equally exploitable. However, The Register notes that Android's kernel configuration guide doesn't have keyrings enabled by default. Perception Point managed to trigger the bug in roughly 30 minutes on a Core i7-5500U CPU, but notes the exploit isn't really time-dependent—after all, the code can easily run in the background and take whatever time it needs.
    According to nixCraft, Red Hat Enterprise Linux 7, CentOS 7, Debian, Ubuntu, and Suse Linux Enterprise 12 are all vulnerable. It's not all bad news, though. Supervisor Mode Execution Protection (SMEP) and Supervisor Mode Access Protection (SMAP) CPU features and SELinux should defeat this exploit.
    Noticia:
    http://techreport.com/news/29627/ser...ege-escalation
    http://www.portugal-tech.pt/image.php?type=sigpic&userid=566&dateline=1384876765

 

 
Página 1 de 2 12 ÚltimoÚltimo

Informação da Thread

Users Browsing this Thread

Estão neste momento 1 users a ver esta thread. (0 membros e 1 visitantes)

Bookmarks

Regras

  • Você Não Poderá criar novos Tópicos
  • Você Não Poderá colocar Respostas
  • Você Não Poderá colocar Anexos
  • Você Não Pode Editar os seus Posts
  •