Like many others, I have been getting random screen freezes since July 2013.
They are more frequent under 13.10, but I was also getting them under 13.04 I have a quad processor, and it seems that if one cpu approaches 100%, I am much more likely to see a screen freeze. Some of the freezes clear themselves in a time fram of 15 seconds to a couple of minutes. If more than two of the copu's go to 100% it is highly probably that a Hard reboot (with the power switch) will be required. (Could there be a kernal logic problem in signalling between the cpu's?) When the "unfreeze" occurs, I will see a screen flash and then the screen is rewritten and everything is fine for a while. If the unfreeze does not occur within a few minutes, I have found that a hard reboot with the power switch is necessary. Sometimes when the screen freezes, the cursor can be moved, but button clicks will no longer work, nor will the keyboard. My keyboard and trackball are both USB if that makes a difference, and my VIDEO card is a NVIDIA GeForce 8600 GTS using NVIDIA's 304.88 driver. I have had multiple monitors attached to my system in the past using my dual port card, but in the last 6 months have only had a ViewSonic VA1930wm at 1440x900 pixels. (In fact, prior to ubuntu 10.04, I was able to run them as separate x-screens, but that went away with Ubuntu 10.04) As a radio Amateur, I frequently run a program called FLDIGI to control one of my Radio Transmitters. When I had FLDIGI configured to use portaudio, everything was fine from Ubuntu 8.04 all the way to Ubuntu 10.04. With Ubuntu 10.04 I started to get some freezes using Portaudio and under Ubuntu 12.10 it was totally unusable - so I switched to PulseAudio (as recommended by the FLDIGI author), and as a result the freezes were less frequent until Ubuntu 13.10, when the freezes became quite frequent. I have no way to tell if the problen is X-server related, or if it is pulseAudio related, or if it has to do with signaling within the kernal. Sometimes when the system "fixes" itself, a problem analysis is created and I assume is transmitted to Ubuntu support. I know for a fact that NO report is generated when I have to hard boot the system. If the screen freezes and can not be fixed, then I will have to abandon Ubuntu and go to mint 13 or mint 14 like a lot of other Radio Amateurs have already done. It is just not acceptable when I am in the middle of a radio conversation with other Radio Hams to have the Ubuntu system freeze and cause my radio transmitter to suddenly stop sending data, but continue to transmit a signal, and then go suddenly off the air when the system is rebooted. Not only is it not polite to just disappear, it is a violation of the FCC's rules and regulations to not end the transmission with my call sign. -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xorg-server in Ubuntu. https://bugs.launchpad.net/bugs/1184451 Title: Ubuntu 13.10 random screen freeze while Normal OS activites To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/1184451/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp
