Hi, While I agree it sounds like some type of power saving issue turning off the USB ports, have a look at the motherboard and see if there are any capacitors which appear to be going bad. If there are then grab your soldering iron (or find someone good at soldering) and replace the caps.
I've got several Dell Optiplex 745's which have had capacitors go on them. When caps go bad strange things happen. As far as the power management stuff goes, make sure power management is turned off in the BIOS. If the 740 is similar to the 745, there are several settings that can be turned off in BIOS. Lorne > > > Larry <larry@...> writes: > > > > > I have searched the archives and no one else has posted this problem > that > > I can find. I have installed the Paravel broadcast automation appliance > > this week and the mouse will freeze/stop working after just a few > minutes > > of use. I have to reboot to get the mouse back but it always freezes. I > > have installed this on a Dell Optiplex 740 dual core 64 bit processor, > 2GB > > Ram, 1TB hard drive, ALSA compatible M-Audio Delta 44 sound card and USB > > mouse and keyboard. After the mouse freezes the USB keyboard will still > > work using the up/down and F keys but the mouse stops no matter what USB > > port I use. Appreciate any help. > > This Dell Optiplex 740 has been running Windows XP reliably with the same > mouse and keyboard since 2009. I have tried 2 different mice and they are > USB and it is not the mouse. I have figured out the problem is all the USB > ports go dead when this happens. When the mouse the stops, the keyboard > works for a while but If I unplug keyboard and plug it back in it will no > longer work at all. Nothing works in any of the USB ports after the mouse > stops. I have tried re-installing the appliance, removing the sound card, > removing memory one stick at a time and the video card and the USB ports > will stop working. I have downgraded the BIOS to 4 former versions and > that makes no difference. There must be something in this Dell chipset > that is conflicting with CentOS. Nothing shows up in dmesg or > the /var/log/messages file. My next step will be downgrading the the > version 1 appliance but I don't have high hopes. > > What brand and model computer are you guys using that have success with > Rivendell Appliance? > > Thanks > Larry > > _______________________________________________ > Rivendell-dev mailing list > [email protected] > http://caspian.paravelsystems.com/mailman/listinfo/rivendell-dev _______________________________________________ Rivendell-dev mailing list [email protected] http://caspian.paravelsystems.com/mailman/listinfo/rivendell-dev
