News Posts matching "bug"

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AMD Preparing BIOS Update to Fix FMA3 Freezes on Ryzen CPU Family

AMD has acknowledged an issue in which applications utilizing FMA3 code (basically compute and floating point heavy applications) can freeze Ryzen-based desktops. According to AMD, a fix is already on the way in the form of a basic bios update that will be issued to motherboard vendors, who will then most assuredly update their boards with the fix. If you want to be sure your Ryzen based system is not affected by this or numerous other teething issues, making sure you are running the latest BIOS will go a long way towards easing your experience with your new platform.

AMD Ryzen Machine Crashes to a Sequence of FMA3 Instructions

An AMD Ryzen 7-1800X powered machine was found to be crashing upon execution of a very specific set of FMA3 instructions by Flops version 2, a simple open-source CPU benchmark by Alexander "Mystical" Yee. An important point to note here is that this little known benchmark has been tailored by its developer to be highly specific to the CPU micro-architecture, with separate binaries for each major x64 architecture (eg: Bulldozer, Sandy Bridge, Haswell, Skylake, etc.), and as such the GitHub repository does not have a "Zen" specific binary.

Members of the HWBot forums found that Ryzen powered machines crash on running the Haswell-specific binary, at "Single-Precision - 128-bit FMA3 - Fused Multiply Add." The Haswell-specific binary (along with, we imagine, Skylake), adds support for the FMA3 instruction-set, which Ryzen supports, and which lends some importance to the discovery of this bug. What also makes this important is because a simple application, running at user privileges (i.e. lacking special super-user/admin privileges), has the ability to crash the machine. Such a code could even be executed through virtual machines, and poses a security issue, with implications for AMD's upcoming "Naples" enterprise processor launch.

Intel's Skylake and Kaby Lake-based Systems Vulnerable to USB Exploit

At this year's CCC hacker congress, researchers from Positive Technologies have released information, which documents vulnerabilities in Intel's Skylake and Kaby Lake series processors' handling of USB 3.0-based debugging - which could be used to attack, corrupt, and even subvert a user's system.

This vulnerability allows attackers to bypass typical security mechanisms - both at the hardware and at the OS level - by using a new debugging interface, which could allow them to install malware and/or rewrite the system's firmware and BIOS. The exploit is currently undetectable using existing security tools, and according to the researchers, this mechanism can be used on a hacked system regardless of the OS installed.

AMD Releases Radeon Software Crimson Edition 16.2.1

AMD released the latest version of Radeon Software Crimson Edition. Version 16.2.1 is marked "non-WHQL" and hence should be a beta. The driver comes with a CrossFireX profile for "Far Cry Primal," along with a variety of game-specific bug fixes for "Fallout 4," and "Rise of the Tomb Raider." It also fixes an issue of choppy display on systems with both FreeSync and CrossFire being enabled. Grab the drivers from the links below.
DOWNLOAD: AMD Radeon Software Crimson Edition 16.2.1 for Windows 10/8.1/7 64-bit | Windows 10/8.1/7 32-bit

AMD Releases Radeon Software Crimson Edition 15.12 WHQL

AMD released the WHQL-signed version of Radeon Software Crimson Edition 15.11.1 as the new 15.12 WHQL. It addresses a variety of game-specific issues, including rendering errors on Star Wars: Battlefront; bugs on Fallout 4; texture-compression issues with Just Cause 3; poor CrossFire performance with Call of Duty: Black Ops 3. It also addresses a critical issue in which the driver would either spool fan-speeds all the way up to 100% on load, or lock them down at 30%, causing certain GPUs to overheat. A variety of bugs specific to the Radeon Settings app were also addressed.

DOWNLOAD: AMD Radeon Software Crimson Edition 15.12 WHQL for Windows 10 64-bit | Windows 10 32-bit | Windows 8.1 64-bit | Windows 8.1 32-bit | Windows 7 64-bit | Windows 7 32-bit

NVIDIA Releases GeForce 344.16 WHQL Drivers

Well, that was fast! NVIDIA gave WHQL signing to the GeForce 344.16 Beta drivers it released earlier this week. The drivers still support just GeForce GTX 980 and GTX 970 graphics cards. The release notes document (PDF) is still not clear on exactly what these drivers bring to the table, over the recently released 344.11 WHQL, but we believe it could be an important bug-fix specific to NVIDIA's new GPUs.
DOWNLOAD: GeForce 344.16 WHQL

28 nm struggles: TSMC & GlobalFoundries

Making silicon chips is not easy, requiring hugely expensive fabs, with massive clean-room environments and at every process shrink, the complexity and difficulty of making the things goes up significantly. It looks like TSMC and GlobalFoundries are both having serious yield problems with their 28 nm process nodes, according to Mike Bryant, technology analyst at Future Horizons and this is causing a rash of non-working wafers – to the point of having nothing working with some chip designs submitted for production. It seems that the root cause of these problems are to do with the pressures of bringing products to market, rather than an inherent problem with the technology; it just takes time that they haven't got to iron out the kinks and they're getting stuck: "Foundries have come under pressure to release cell libraries too early – which end up with designs that don't work," Bryant said. In an effort to try and be seen to treat every customer equally, TSMC is attempting to launch ten 28 nm designs from seven companies, but it's not working out too well: "At 45-nm, only NVIDIA was affected. At 28-nm any problems for TSMC will be problems for many customers" said Bryant.

NVIDIA Investigates TDR Issues, Requests Sample Cards

Guru3D reports on a post from NVIDIA tech support on NVIDIA's forums regarding TDR issues (Timeout Detection & Recovery problem (display stopped responding but has successfully recovered)). These problems centre around Battlefield 3 and Windows Media Centre, which NVIDIA can't reproduce, so it looks like the problems may be with specific card models. NVIDIA rep ManuelG posted:

Bitcoin & Password Stealer Trojan For Mac Now Available!

Hot on the heels of our previous story of Apple Macs falling prey to a DDoS trojan, we now have another Mac trojan come on the market, as explained by Sophos. Yes, the Apple platform must indeed be becoming more popular to get this one. It's an unfortunate fact of life that the popularity of any computing platform, including smartphones, can be judged by the number of criminals who will attack it. This little nasty, called OSX/Miner-D or 'DevilRobber', hijacks Mac OS X to perform various tricks, which include minting Bitcoins (the virtual and now virtually worthless currency) stealing usernames and passwords (of course) taking screenshots and stealing the victim's Bitcoin wallet while it's at it, if there is one. And for good measure:
it runs a script that copies information to a file called dump.txt regarding truecrypt data, Vidalia (TOR plugin for Firefox), your Safari browsing history, and .bash_history.
So, now the criminals also know about all the sites one has visited, eroding user privacy even more. It looks like this malware has covered all the bases, but wait, there's more.

SandForce BSOD Firmware Bug: Fix Finally Available

Finally a fix for the BSOD/disconnect bug that has been plaguing users for months is available for SF-2200 based SSDs. OCZ uses these, has been testing this new firmware for several weeks and now believes that it's fit for release. The new firmware is at version 2.15 for OCZ drives and 3.3.2 for drives that SandForce's standard numbering system. As with any firmware update, it should be used cautiously, all data backed up and perhaps used on a non-mission critical Windows install for a while, for confidence. Note that there may be more unresolved issues and new ones introduced.
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