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uk.telecom.broadband (UK broadband) (uk.telecom.broadband) Discussion of broadband services, technology and equipment as provided in the UK. Discussions of specific services based on ADSL, cable modems or other broadband technology are also on-topic. Advertising is not allowed. |
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#1
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![]() I have a relatively new compaq evo N800v laptop with two USB 2 ports. I am trying to connect an HP psc 750 printer/scanner, keyboard, mouse and speedtouch Adsl modem. I have a belkin non powered hub so can connect three devices via the hub and one straight to the pc. I've tried various combinations. However if the printer and modem are running simultaneously the system hangs with the CPU thrashing at 100%. Please would you tell me: Is this a problem caused by the hub - is there some kind of restriction? would a powered hub solve this? Any suggestions please? Thanks Turbo |
#2
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![]() On Mon, 08 Dec 2003 10:19:05 -0800, turbo wrote: I have a relatively new compaq evo N800v laptop with two USB 2 ports. I am trying to connect an HP psc 750 printer/scanner, keyboard, mouse and speedtouch Adsl modem. I have a belkin non powered hub so can connect three devices via the hub and one straight to the pc. I've tried various combinations. However if the printer and modem are running simultaneously the system hangs with the CPU thrashing at 100%. Please would you tell me: Is this a problem caused by the hub - is there some kind of restriction? would a powered hub solve this? Any suggestions please? Thanks Turbo Have you looked for the latest drivers for both devices? Graham. |
#3
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![]() Have you Installed Software Correctly or Power ed Hub Regards Jerry Beemer "Graham" wrote in message news ![]() On Mon, 08 Dec 2003 10:19:05 -0800, turbo wrote: I have a relatively new compaq evo N800v laptop with two USB 2 ports. I am trying to connect an HP psc 750 printer/scanner, keyboard, mouse and speedtouch Adsl modem. I have a belkin non powered hub so can connect three devices via the hub and one straight to the pc. I've tried various combinations. However if the printer and modem are running simultaneously the system hangs with the CPU thrashing at 100%. Please would you tell me: Is this a problem caused by the hub - is there some kind of restriction? would a powered hub solve this? Any suggestions please? Thanks Turbo Have you looked for the latest drivers for both devices? Graham. |
#4
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![]() Can the PC actually provide enough power for these devices? I had problems with a new ASUS board and had to add a 4 port PCI card to be able to power scanner + webcam + headset. Some chips don't pump out much current, from memory Intel. -- Simon Brown www.hb9drv.ch "J CHILTON" wrote in message ... Have you Installed Software Correctly or Power ed Hub |
#5
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![]() A USB port is only able to provide 500mA to each socket (or is it per controller which can control 2(?) ports?). I could be wrong, but multiple unpowered devices tend to be a problem with unpowered hubs. Remember - the 3 port hub is running off a single 500mA socket (also powering itself - not just the plugged in devices). When the original Speedtouch USB modem came out there used to be a problem with it attempting to draw 500mA and it causing lots of problems - even without using a hub. They've probably improved it since then, but I would still tend to either put it on a USB port of its own (direct into the PC) or use a powered hub. Remember - you're running 3 unpowered devices off that 500mA socket. Powered devices are different (eg. the printer which has a mains plug) this device (should) only use the USB as a communications to the PC - not for powering the unit - that's what's the mains are for. I would try to put the USB ADSL modem onto a PC USB port and the 3 other devices onto the hub. If the problem is still there then try one further thing of not using the keyboard mouse (use the built into the laptop keyboard/touchpad) and plug printer and modem directly into the laptop. If the problem is still there, it may well be a driver issue. Hope that helps. D "Simon Brown" wrote in message ... Can the PC actually provide enough power for these devices? I had problems with a new ASUS board and had to add a 4 port PCI card to be able to power scanner + webcam + headset. Some chips don't pump out much current, from memory Intel. -- Simon Brown www.hb9drv.ch "J CHILTON" wrote in message ... Have you Installed Software Correctly or Power ed Hub |
#6
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![]() "David Hearn" wrote in message ... A USB port is only able to provide 500mA to each socket (or is it per controller which can control 2(?) ports?). I could be wrong, but multiple unpowered devices tend to be a problem with unpowered hubs. Remember - the 3 port hub is running off a single 500mA socket (also powering itself - not just the plugged in devices). When the original Speedtouch USB modem came out there used to be a problem with it attempting to draw 500mA and it causing lots of problems - even without using a hub. They've probably improved it since then, but I would still tend to either put it on a USB port of its own (direct into the PC) or use a powered hub. Remember - you're running 3 unpowered devices off that 500mA socket. Powered devices are different (eg. the printer which has a mains plug) this device (should) only use the USB as a communications to the PC - not for powering the unit - that's what's the mains are for. I would try to put the USB ADSL modem onto a PC USB port and the 3 other devices onto the hub. If the problem is still there then try one further thing of not using the keyboard mouse (use the built into the laptop keyboard/touchpad) and plug printer and modem directly into the laptop. If the problem is still there, it may well be a driver issue. Hope that helps. D "Simon Brown" wrote in message ... Can the PC actually provide enough power for these devices? I had problems with a new ASUS board and had to add a 4 port PCI card to be able to power scanner + webcam + headset. Some chips don't pump out much current, from memory Intel. -- Simon Brown www.hb9drv.ch "J CHILTON" wrote in message ... Have you Installed Software Correctly or Power ed Hub I've tried plugging the printer and ADSL directly into the USB ports and have not encountered any problems. Incidentally I'm using the separate keyboard and mouse because of RSI type problems. Looks like I need to try a powered hub Thanks Turbo |
#7
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![]() "turbo" wrote in message om... "David Hearn" wrote in message ... A USB port is only able to provide 500mA to each socket (or is it per controller which can control 2(?) ports?). I could be wrong, but multiple unpowered devices tend to be a problem with unpowered hubs. Remember - the 3 port hub is running off a single 500mA socket (also powering itself - not just the plugged in devices). When the original Speedtouch USB modem came out there used to be a problem with it attempting to draw 500mA and it causing lots of problems - even without using a hub. They've probably improved it since then, but I would still tend to either put it on a USB port of its own (direct into the PC) or use a powered hub. Remember - you're running 3 unpowered devices off that 500mA socket. Powered devices are different (eg. the printer which has a mains plug) this device (should) only use the USB as a communications to the PC - not for powering the unit - that's what's the mains are for. I would try to put the USB ADSL modem onto a PC USB port and the 3 other devices onto the hub. If the problem is still there then try one further thing of not using the keyboard mouse (use the built into the laptop keyboard/touchpad) and plug printer and modem directly into the laptop. If the problem is still there, it may well be a driver issue. Hope that helps. D "Simon Brown" wrote in message ... Can the PC actually provide enough power for these devices? I had problems with a new ASUS board and had to add a 4 port PCI card to be able to power scanner + webcam + headset. Some chips don't pump out much current, from memory Intel. -- Simon Brown www.hb9drv.ch "J CHILTON" wrote in message ... Have you Installed Software Correctly or Power ed Hub I've tried plugging the printer and ADSL directly into the USB ports and have not encountered any problems. Incidentally I'm using the separate keyboard and mouse because of RSI type problems. Looks like I need to try a powered hub Thanks Turbo Yep - that sounds like that'll be the solution. ![]() D |
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