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13/04/2017

Dell latitude d820 laptop battery

Nvidia’s director of product marketing for Tegra, Matt Wuebbling, confirmed that you'll see clamshells on Tegra 3 - although he didn't specify any details or release dates.Nevertheless, with Windows 8 set to run on ARM processors, it's a move that will give Intel and AMD cause for concern.Nvidia's chip is set to make its debut in the Asus Eee Pad Transformer Prime, which will be released in January for £449.Nvidia is partnering its four cores with a low-power A9-based chip it dubs a companion core, which is reined in to 500MHz and is designed to handle low-power tasks such as video and audio playback.Nvidia claims this core helps web browsing consume 30% less power than Tegra 2, with audio playback requiring 61% less juice.Each of Tegra 3's four main cores, as well as the companion chip, can be activated or deactivated depending on the intensity of the task being carried out, with Nvidia confirming that the OS won't be affected by switching between cores.The updated graphics processing unit, meanwhile, has been designed to provide additional physics realism, dynamic lighting and particle effects, with Nvidia demonstrations illustrating improved water effects, sharper textures and more detail throughout.The introduction of a fifth core invites comparisons to ARM's big.LITTLE scheme, which partners a powerful Cortex A15 MPCore processor with an entry-level A7 chip that’s used for less intensive tasks.Unlike some of its rivals, there isn’t much in the way of ostentatious flair with D-Link’s latest 802.11ac router. Built in the same tall, cylindrical chassis the company has employed for some time, there isn’t much in the specifications to get the pulse racing either.The DIR-868L’s top 802.11ac link speed is 1,300Mbits/sec, and with 802.11n it maxes out at 450Mbits/sec. This places it one rung down the ladder from flagship routers such as the Linksys WRT1900AC and the Netgear Nighthawk, but considering the low price, it’s still a respectable specification.

Elsewhere, you get only a single USB socket, although it is of the faster USB 3 type. There’s no ADSL modem, only a Gigabit Ethernet WAN port, but external modems can be picked up fairly cheaply these days.Log into the router’s web interface and the D-Link continues to underwhelm. The clunky UI has hardly changed in years, and although it has plenty of features, its front-end is complicated to navigate and will be daunting to less-technical users.We’re also disappointed to see there’s no form of content-based parental control, although you get the option to block access to specific devices at predefined times. It’s possible to block URLs, too, or run a whitelist – so only URLs in the list are accessible – if you really want to lock down your internet connection. But setting up these features isn’t straightforward.The D-Link’s old-school UI sits at odds with the quality of features on offer. Its cloud management tools are good, and capable enough to rival Linksys’ Smart Wi-Fi features. You don’t get app extensibility, but you can monitor your network remotely from your PC and change core settings by registering the router with the cloud-based mydlink service. We like the way you can monitor how much data individual connected devices are consuming, and block those devices if necessary.

There are also iOS and Android apps: mydlink Lite lets you carry out basic monitoring and settings changes, and block devices remotely, although it lacks a live data-consumption meter; SharePort Mobile enables remote media streaming from a connected USB stick or hard drive; and QRS makes setup easier for those without access to a laptop or PC.Performance is key, however, and it’s here that the D-Link shines. At close range, it delivered the fastest speeds we’ve seen so far over 802.11ac, outstripping routers more than twice its price. It hit 79.7MB/sec from a distance of 2.5m, and speeds over 802.11n were also impressive.In our long-range tests at 30m, it faded somewhat. Its 5GHz speeds took the biggest hit, throughput dropping 71% on 802.11ac to 23.2MB/sec and 66% to the 2×2 stream iPad Air. Its speeds over 2.4GHz, however, were more consistent, falling by just over 50% to our 3×3 stream PCI Express card, and a similar amount to the 2×2 stream iPad Air.Despite that, speeds in this test never dipped to a level that we'd be concerned with. Throw in a top USB speed of 39.4MB/sec and you have a good-value all-rounder. At only £117, the D-Link DIR-868L is a steal.I have a Dell Studio 1555 laptop which has developed an infuriating habit. When typing, the cursor randomly repositions itself in previously entered text and I only become aware of its changed position when I look up to review what I have typed -- usually gobbledegook.I have tried to get help from Dell without success, and I have also sought advice from my IT manager at work but again without success. I have read that the only cure is to re-image the PC.

Although I am reasonably PC literate, that process is beyond me.This problem comes up quite often on the net, usually on PCs but sometimes on Macs, but almost never with any useful information. Typically people mention the brand of PC and the operating system, which makes the problem appear to be completely random and therefore beyond rational solution. To identify it as a fault, we really want to know the make and model of the mousepad, the version number of the software driver, and similar details.I'd not run into the problem because, for decades, I've used Toshiba Portégé and IBM ThinkPad laptops with pointing sticks (TrackPoint, PointStick etc) instead of mousepads. However, I did run into it recently with a couple of netbooks running Windows XP, and a thin-and-light Windows 7 portable that I bought myself. The mouse seemed to be clicking itself to select actions on a mouse-hover, which could be disastrous. Neither Microsoft nor the manufacturer could help me turn this feature off, probably because it didn't exist.I did solve the problem in the end, by going to the touchpad controller and turning off (unchecking) the feature often known as tap to click. On my Asus UL30A, this meant right-clicking on the Elan Smart-Pad icon in the Systray (bottom right), selecting the Elan tab in Mouse Properties, clicking Options and then Tapping. You can also adjust its sensitivity to PalmTracking.

I had been certain that I wasn't touching the mousepad, and not brushing it with my palm. However, I was making enough contact to affect the mouse pointer and move the cursor. Either my skin is less sensitive than it used to be, or mousepads are far more sensitive than they used to be, or both. In fact, some seem to be so sensitive they could be affected by people hitting nearby keys such as the space-bar, though I have no concrete evidence for this.If disabling tap to click doesn't remove the problem, there are slightly more extreme solutions. One is to turn the mousepad off while typing. If there isn't an on/off button by the pad, read the manual for the command: it might be something like Fn+F3, or Fn+F9. Another is to disable the mousepad in the control software and use an external mouse.

That will tell you whether or not the mousepad is the culprit.There's also a free, open source utility called Touchfreeze for Windows NT, 2000 and XP, which automatically disables touchpad while you are typing text. Like syndaemon on X-Windows.Some people report that their pointer-jumping problem was solved by installing the latest mousepad driver. Others say they have been helped by unchecking the option that says Hide mousepointer while typing. (Go to Mouse Properties and click the tab for Pointer Options.) In some cases, there may actually be something wrong with the mousepad, such as a loose connection. Partly disassembling a laptop, blowing out the dust and pushing home all the connectors can solve intermittent problems for those brave enough to tackle it, or at least take their machine to a local repairer.Apple Mac OS X v10.5 (Leopard) users who have the problem can read the support document MacBook, MacBook Pro: Cursor reacts unexpectedly. This suggests checking the Ignore accidental trackpad input option.Incidentally, the decision to re-image a problem PC is one frequently taken by businesses. Large corporations often have a disk image that includes their preferred Windows set-up, including updates, and also their standard applications. The image is copied straight to the PC's hard drive, which is much faster than installing Windows and applications separately. Some companies, such as Dell, will deliver PCs in volume with a company's disk image installed. There are also programs (for example, Acronis True Image) that you can use to make a disk image of your own PC for backup purposes.

… we’ve got a small favour to ask. More people are reading the Guardian than ever, but far fewer are paying for it. Advertising revenues across the media are falling fast. And unlike many news organisations we haven’t put up a paywall – we want to keep our journalism as open as we can. So you can see why we need to ask for your help. The Guardian’s independent, investigative journalism takes a lot of time, money and hard work to produce. But we do it because we believe our perspective matters – because it might well be your perspective, too.The row over a Philadelphia school district accused of secretly spying on pupils through laptop cameras escalated today after it acknowledged capturing more than 56,000 images of its students, many of them in their homes.When the scandal first broke, it was believed that only a few pictures had been taken of one pupil, Blake Robbins. But court papers released this week showed that thousands of images were taken of Robbins and other students.Robbins and his parents have filed an action against the school district of Lower Merion in an affluent suburb of Philadelphia. Court papers from the Robbins's lawyers said that at first it was thought that the laptops' peeping tom technology had produced a few images but they found more than 400 of Robbins, including images showing him partially undressed and sleeping.There were images of other students in their homes as well.Not only was Blake Robbins being spied upon, but every one of the people he was IM [instant message] chatting with were spied upon, said Robbins's lawyer, Mark Haltzman.Henry Hockeimer, a lawyer for Harriton school which Robbins attended, revealed that at least 56,000 webcam pictures and other images were taken from students' laptops but he denied any were of a salacious nature.The school district issued 2,300 laptops to students and said it activated the spyware installed in them to try to track 80 that had gone missing. The system has now been deactivated.

The row began when Robbins was confronted in November by a school official suspicious that he may have had drugs in his bedroom and was shown a photograph taken from his laptop.Robbins said the pills were sweets. He and his parents launched the case, claiming violation of civil rights.Robbins said he did not know why the spying device was activated as his laptop had not been reported stolen or missing. Other students, whose pictures were taken said their laptops had not been reported stolen or missing either.The FBI is investigating the scandal and the Senate is to look at proposed legislation that would make it a crime to use webcams for spying.An administrator at the school, one of the few with authority to track the laptops, was refusing to answer questions, citing her constitutional right to remain silent.The Philadelphia Inquirer reported that 38,500 of the images came from six laptops that had been reported missing from the Harriton gym in September 2008.

These apparently helped the police catch a suspect. Another set of images were from cameras in laptops which employees responsible for tracking failed or forgot to turn off.In about 15 cases, it has not yet been established why the machines were being monitored. In a few other cases, images taken have not been recovered.Hockeimer said a tracking programme in the devices automatically took images every 15 minutes, usually capturing a photo of the user and a screen shot at the same time.The programme was sometimes turned on for weeks or months at a time, Hockeimer said.There were no written policies or procedures governing the circumstances surrounding activating the program and the circumstances regarding turning off the activations, he said.The court papers, filed by Robbins' lawyers, said that the technology was activated between 20 October and 4 November last year, with most of the 400 shots of him while he was in his home, and included his family. There were additional webcam pictures and screen shots taken of Blake Robbins which, to date, have not been recovered because the evidence was purged by the IT department, the court papers say.His lawyers are trying to obtain access to the administrator's home computer to establish whether she downloaded any of the pictures. The court papers allege she may be a voyeur.In one email, when an IT person commented on how the viewing of the webcam pictures and screen shots from a student's computer was like a little LMSD (Lower Merion School District) soap opera, she allegedly replied: I know, I love it.

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