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Jul
17
comment Internal wireless adaptor becomes not working after I move the laptop
Thanks! Restarting OS isn't tricking Ubuntu to think it works. It does work until I move my laptop.
Jul
17
comment Internal wireless adaptor becomes not working after I move the laptop
Thanks! But why restarting Ubuntu will make the adaptor work again?
Jul
17
comment Internal wireless adaptor becomes not working after I move the laptop
Thanks, @DavidSchwartz! (1) "Why did you open your laptop a few months ago?" I have had the problem for more than a year. (2) I can't be sure if they are fully engaged. But why restarting OS will temporarily solve the problem? (3) Will a USB wireless adaptor (mentioned in my post) solve the problem?
Jul
6
comment How to see both sides in Skype video chatting?
By the way, do you know if there is some online service to test webcam? I know skype has its service to test speaker.
Jul
6
comment How to see both sides in Skype video chatting?
Mine is 4.2.0.11.
Apr
26
comment How shall I enter BIOS after Ubuntu has fully started?
My laptop is Lenovo T400.
Sep
4
comment What are the frequencies of current in computers' external peripheral cables and internal buses?
@barlop: I got some nice answers here electronics.stackexchange.com/questions/38989/…
Aug
28
comment What are the frequencies of current in computers' external peripheral cables and internal buses?
@RedGrittyBrick: Do you mean that although the computer is using DC directly from the power adapter on its power chord, some parts of the computer convert DC back to AC again, and the currents in Ethernet cables (and possibly in USB cables and internal buses) are not DC but AC?
Aug
28
comment What are the frequencies of current in computers' external peripheral cables and internal buses?
Isn't the electricity already DC because the power adapter is AC->DC converter?
Aug
28
comment What are the frequencies of current in computers' external peripheral cables and internal buses?
@RedGrittyBrick: signals for data that is transmitted in theose cables are electricity currents, aren't they? So the frequency of signal and the frequency of the electricity current are the same concept?
Aug
28
comment What are the frequencies of current in computers' external peripheral cables and internal buses?
What is the difference between "signal frequency" and electricity frequency?
Aug
28
comment What are the frequencies of current in computers' external peripheral cables and internal buses?
@barlop: What does "+" mean? Is it different from GND?
Aug
28
comment What are the frequencies of current in computers' external peripheral cables and internal buses?
@barlop: in data wires of USB cables, and ethernet, all that are transmitted are electrical currents, right?
Aug
28
comment What are the frequencies of current in computers' external peripheral cables and internal buses?
@barlop: do you mean the currents in computers' external peripheral cables, such as Ethernet cable, USB cable, and in computers' internal buses are all DC, so their frequencies are all zero?
Aug
27
comment Cannot connect to Google sites in Firefox
@w3d: Can I say your comment is a cunning plan to get me to stay with Firefox?
Aug
27
comment Cannot connect to Google sites in Firefox
@Synetech: I am not using a proxy. But I am not sure if it has something to do with that I open about 200 tabs already.
Aug
23
comment Meaning of “expansion bus” or “peripheral bus”
Is the bus between northbridge and graphical card slot, called "high-speed graphical bus (AGP or PCI express)" an internal or expansion bus?
Aug
23
comment Meaning of “expansion bus” or “peripheral bus”
internal and external do refer to the computer case. Same Wikipedia link for peripherals "Usually, the word peripheral is used to refer to a device external to the computer case, but the devices located inside the computer case are also technically peripherals. Devices that exist outside the computer case are called external peripherals, or auxiliary components. Devices that are inside the case such as internal hard drives or CD-ROM drives are also peripherals in technical terms and are called internal peripherals, but may not be recognized as peripherals by laypeople."
Aug
23
comment Meaning of “expansion bus” or “peripheral bus”
@avirk: Thanks, your suggestion is a good one.
Aug
22
comment What to do with a new external HDD in order to be used under Ubuntu?
If I want to use it under both Ubuntu and Windows, which format shall I go, ext3 or ntfs?