Guest Evil Kaz Posted November 30, 2009 Report Share Posted November 30, 2009 (edited) Hey all Have a strange problem, when the T-Mobile Pulse (Huawei U8220) is placed flat on a table the screen becomes unresponsive. If i tilt the phone at a slight angle then its fine again. I half suspect it might be a "feature" of some software I've installed but cant find any obvious suspects. Using the custom modaco rom. Oh and strangely it wont occur on every flat surface, I've mainly noticed it when its on my bed or the dinning table. Anyone else experienced something like this? :D Edited November 30, 2009 by Evil Kaz Link to comment Share on other sites More sharing options...
Guest kristijan_mk Posted November 30, 2009 Report Share Posted November 30, 2009 Hey all Have a strange problem, when the T-Mobile Pulse (Huawei U8220) is placed flat on a table the screen becomes unresponsive. If i tilt the phone at a slight angle then its fine again. I half suspect it might be a "feature" of some software I've installed but cant find any obvious suspects. Using the custom modaco rom. Oh and strangely it wont occur on every flat surface, I've mainly noticed it when its on my bed or the dinning table. Anyone else experienced something like this? :D I've read somewhere (maybe even on modaco) that this is due to capacitive screen technology. human touch on the case is needed in order for screen to work properly (i supose that when you tilt it, you held the phone in hand, right?). Link to comment Share on other sites More sharing options...
Guest Evil Kaz Posted November 30, 2009 Report Share Posted November 30, 2009 If i understand you correctly, your saying that human touch is needed on the case for the screen to work, i don't believe this is true. The screen does need human touch (or a specialised capacitive screen stylus), normal styluses wont work like they would on a resistive screen. But the case does not need touch. If I rest the Pulse at an angle, say against a magazine, then the screen will respond fine. Link to comment Share on other sites More sharing options...
Guest bounty123 Posted November 30, 2009 Report Share Posted November 30, 2009 This is exactly the case with my device. Link to comment Share on other sites More sharing options...
Guest kristijan_mk Posted November 30, 2009 Report Share Posted November 30, 2009 (edited) If i understand you correctly, your saying that human touch is needed on the case for the screen to work, i don't believe this is true. The screen does need human touch (or a specialised capacitive screen stylus), normal styluses wont work like they would on a resistive screen. But the case does not need touch. If I rest the Pulse at an angle, say against a magazine, then the screen will respond fine. capacitive screen uses much diferent technology than resistive, so lets not include styluses in the discusion :D Wikipedia (not my favourite source of information, but will do the job in this case) says this A capacitive touchscreen panel consists of an insulator such as glass, coated with a transparent conductor such as indium tin oxide As the human body is also a conductor, touching the surface of the screen results in a distortion of the local electrostatic field, measurable as a change in capacitance. Different technologies may be used to determine the location of the touch. The location can be passed to a computer running a software application which will calculate how the user's touch relates to the computer software. So my idea is that holding the case increases sensitivity (since, Pulse when left on some surface works only worse). And lets be honest, the Pulse it's not exactly the state of the art produced device :( Edited November 30, 2009 by kristijan_mk Link to comment Share on other sites More sharing options...
Guest Evil Kaz Posted November 30, 2009 Report Share Posted November 30, 2009 capacitive screen uses much diferent technology than resistive, so lets not include styluses in the discusion :( Wikipedia (not my favourite source of information, but will do the job in this case) says this A capacitive touchscreen panel consists of an insulator such as glass, coated with a transparent conductor such as indium tin oxide As the human body is also a conductor, touching the surface of the screen results in a distortion of the local electrostatic field, measurable as a change in capacitance. Different technologies may be used to determine the location of the touch. The location can be passed to a computer running a software application which will calculate how the user's touch relates to the computer software. So my idea is that holding the case increases sensitivity (since, Pulse when left on some surface works only worse). And lets be honest, the Pulse it's not exactly the state of the art produced device ;) I disagree with your reasoning, as the wiki entry mentions nothing about the case, its only relevent too the screen. But that point taken aside, as i mention in my previous post, if the phone is tilted at a slight incline, like placing a magazine below it (and no fingers touching the case) the screen is as responsive as if were in my hand. Its almost as if the accelerometer detects the device is perfectly horizontal and locks out the screen. :D Link to comment Share on other sites More sharing options...
Guest -Yaya- Posted November 30, 2009 Report Share Posted November 30, 2009 I disagree with your reasoning, as the wiki entry mentions nothing about the case, its only relevent too the screen. But that point taken aside, as i mention in my previous post, if the phone is tilted at a slight incline, like placing a magazine below it (and no fingers touching the case) the screen is as responsive as if were in my hand. Its almost as if the accelerometer detects the device is perfectly horizontal and locks out the screen. :D Same here... Seems to be a stupid feature and not a bug... Link to comment Share on other sites More sharing options...
Guest demusss Posted November 30, 2009 Report Share Posted November 30, 2009 I discovered this a couple of weeks ago. You need to be touching the back of the phone for the screen to work. Other ways of getting the screen to work without touching the back are, plugging in the earphones, or even just placing the phone on the earphone wire works. Anthony Link to comment Share on other sites More sharing options...
Guest nxsfan Posted December 9, 2009 Report Share Posted December 9, 2009 (edited) Sorry to reawaken an old thread but my phone has this problem also. This is not directly an issue of capacitive touchscreens as my ipod touch behaves perfectly when lying on a table. The pulse will detect some presses towards the center of the screen when lying on a table but will only work properly if held in my other hand. This is not an issue of inclination (for me) propping the phone up has no effect. Does every Pulse have this issue or is it a manufacturing defect with only some? Is it a problem that could be resolved with some sort of calibration tool (even if one currently does not exist). I've done some experimentation with the device - testing the letter p. In a hand the device works. On my leg wearing jeans the device works. On a table the keyboard stops working. On my leg wearing jeans with 5 sheets of paper underneath it works intermittently. On my leg wearing jeans with a book the keyboard stops working. When wearing a glove holding the phone and a bare finger typing it works intermittently. On top of a monitor psu it works! EDIT: With the back cover off it works if held in another hand. wtf.... If i had to come up with some BS answer i'd suggest that the internal sensors currently require a greater alteration of the electrostatic field then a single fingertip can provide so I'm hoping this can be resolved somewhere in software. Edited December 9, 2009 by nxsfan Link to comment Share on other sites More sharing options...
Guest le_lutin Posted December 9, 2009 Report Share Posted December 9, 2009 Sorry to reawaken an old thread but my phone has this problem also. This is not directly an issue of capacitive touchscreens as my ipod touch behaves perfectly when lying on a table. The pulse will detect some presses towards the center of the screen when lying on a table but will only work properly if held in my other hand. This is not an issue of inclination (for me) propping the phone up has no effect. Does every Pulse have this issue or is it a manufacturing defect with only some? Is it a problem that could be resolved with some sort of calibration tool (even if one currently does not exist). I've done some experimentation with the device - testing the letter p. In a hand the device works. On my leg wearing jeans the device works. On a table the keyboard stops working. On my leg wearing jeans with 5 sheets of paper underneath it works intermittently. On my leg wearing jeans with a book the keyboard stops working. When wearing a glove holding the phone and a bare finger typing it works intermittently. On top of a monitor psu it works! wtf.... If i had to come up with some BS answer i'd suggest that the internal sensors currently require a greater alteration of the electrostatic field then a single fingertip can provide so I'm hoping this can be resolved somewhere in software. Good god, that sounds mental. I can't imagine that this is a feature of the phone at all, as you might want to use the phone as a SatNav on your dash (in a holder). In your case this would not be possible. And if it's not a feature then it must be a bug... Link to comment Share on other sites More sharing options...
Guest kristijan_mk Posted December 9, 2009 Report Share Posted December 9, 2009 If i had to come up with some BS answer i'd suggest that the internal sensors currently require a greater alteration of the electrostatic field then a single fingertip can provide so I'm hoping this can be resolved somewhere in software. I still go with my theory that the responsiveness is increased when holding in hand. I go further and say that the phone needs grounding in order to function well. I checked and the phone works fine on metal table. I suppose that it will work fine in a holder as a navigation device. Especially if the holder is made from metal ;) Link to comment Share on other sites More sharing options...
Guest nxsfan Posted December 9, 2009 Report Share Posted December 9, 2009 It is a problem I think I can live with, but what I would really like to know is are all Pulse's suffering from the same problem? I wondered about grounding, it is odd to think that the back is conductive and how does it work when the back is off and there is no contact with the sides? I tried with the phone on a big piece of tinfoil which worked intermittently again, but better than not at all. Link to comment Share on other sites More sharing options...
Guest bounty123 Posted December 9, 2009 Report Share Posted December 9, 2009 It is a problem I think I can live with, but what I would really like to know is are all Pulse's suffering from the same problem? I wondered about grounding, it is odd to think that the back is conductive and how does it work when the back is off and there is no contact with the sides? I tried with the phone on a big piece of tinfoil which worked intermittently again, but better than not at all. All of them. At least mine does that's for sure, but it does not bother me really. Link to comment Share on other sites More sharing options...
Guest _melchett Posted December 9, 2009 Report Share Posted December 9, 2009 Sorry to reawaken an old thread but my phone has this problem also. This is not directly an issue of capacitive touchscreens as my ipod touch behaves perfectly when lying on a table. The pulse will detect some presses towards the center of the screen when lying on a table but will only work properly if held in my other hand. This is not an issue of inclination (for me) propping the phone up has no effect. Does every Pulse have this issue or is it a manufacturing defect with only some? Is it a problem that could be resolved with some sort of calibration tool (even if one currently does not exist). I've done some experimentation with the device - testing the letter p. In a hand the device works. On my leg wearing jeans the device works. On a table the keyboard stops working. On my leg wearing jeans with 5 sheets of paper underneath it works intermittently. On my leg wearing jeans with a book the keyboard stops working. When wearing a glove holding the phone and a bare finger typing it works intermittently. On top of a monitor psu it works! EDIT: With the back cover off it works if held in another hand. wtf.... If i had to come up with some BS answer i'd suggest that the internal sensors currently require a greater alteration of the electrostatic field then a single fingertip can provide so I'm hoping this can be resolved somewhere in software. Top effort on the research! Link to comment Share on other sites More sharing options...
Guest bagnaj97 Posted December 10, 2009 Report Share Posted December 10, 2009 I've got this issue too. It's a pain in the arse when using copilot and the battery gets low. It pops up a warning saying battery below 30% and I can only get rid of it by removing the pulse from the dash mount so I can dismiss the popup with the touchscreen. I can't do this whilst driving, it's going to get me lost one day! Link to comment Share on other sites More sharing options...
Guest rss2k Posted December 10, 2009 Report Share Posted December 10, 2009 I've got this issue too. It's a pain in the arse when using copilot and the battery gets low. It pops up a warning saying battery below 30% and I can only get rid of it by removing the pulse from the dash mount so I can dismiss the popup with the touchscreen. I can't do this whilst driving, it's going to get me lost one day! Just adding a car charging adapter is a better solution I guess? It's cheap and a lot safer. You do spend money on nav software and skimp out on a charge solution? Bad economics if you ask me. Link to comment Share on other sites More sharing options...
Guest demusss Posted December 11, 2009 Report Share Posted December 11, 2009 Just adding a car charging adapter is a better solution I guess? It's cheap and a lot safer. You do spend money on nav software and skimp out on a charge solution? Bad economics if you ask me. Also having the charger plugged in to the phone makes the screen work in a holder Link to comment Share on other sites More sharing options...
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