RE: CPU overloading in WinVNC connecting to Linux box
Nicholas, Check the task manager on your notebook to see what is causing the CPU usage. I'd bet it's kernel CPU usage (i.e. the CPU usage bar will mostly be red), and that it's caused by some sort of problem with your operating system drivers. VNC 4.0 and VNC 3.3.7 are completely different codebases, so a CPU-hogging bug in one is unlikely to also exist in the other. More importantly, if an application using the CPU can cause your laptop to overheat then there is something seriously wrong with its internal temperature control, indicating either a power management driver problem or a hardware fault. Regards, Wez @ RealVNC Ltd. -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Nicholas Keown Sent: 01 March 2005 23:30 To: vnc-list@realvnc.com Subject: CPU overloading in WinVNC connecting to Linux box My CPU is maxing out causing overheating on my notebook when connecting to a Linux Fedora Core 3 box. I use this application to connect to windows machines with no issues. I have downloaded and tested the viewers for v4.0 and 3.3.7 and the result is the same - maximum CPU usage on my windows client machine. Can anyone advise a fix for this? Can I configure the vncserver on the linux box to minimise this, and if so what configuration/file is used? Thanks. Nicholas ___ VNC-List mailing list VNC-List@realvnc.com To remove yourself from the list visit: http://www.realvnc.com/mailman/listinfo/vnc-list ___ VNC-List mailing list VNC-List@realvnc.com To remove yourself from the list visit: http://www.realvnc.com/mailman/listinfo/vnc-list
Re: CPU overloading in WinVNC connecting to Linux box
James, thank for the reply. The task causing the problem is vncviewer.exe, hogging between 50 and 70% of CPU constantly, causing overheating of my windows notebook. When I connect to a windows box, there is no problem. I thought it could be related to the polling etc on the linux box, and was wondering if these setting can be altered for a standard fedora 3 install as a test. Has knowone else had these sorts of problems? I have seen it in other threads here, but it was blammed on a buggy earlier version. Thanks. James Weatherall wrote: Nicholas, Check the task manager on your notebook to see what is causing the CPU usage. I'd bet it's kernel CPU usage (i.e. the CPU usage bar will mostly be red), and that it's caused by some sort of problem with your operating system drivers. VNC 4.0 and VNC 3.3.7 are completely different codebases, so a CPU-hogging bug in one is unlikely to also exist in the other. More importantly, if an application using the CPU can cause your laptop to overheat then there is something seriously wrong with its internal temperature control, indicating either a power management driver problem or a hardware fault. Regards, Wez @ RealVNC Ltd. -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Nicholas Keown Sent: 01 March 2005 23:30 To: vnc-list@realvnc.com Subject: CPU overloading in WinVNC connecting to Linux box My CPU is maxing out causing overheating on my notebook when connecting to a Linux Fedora Core 3 box. I use this application to connect to windows machines with no issues. I have downloaded and tested the viewers for v4.0 and 3.3.7 and the result is the same - maximum CPU usage on my windows client machine. Can anyone advise a fix for this? Can I configure the vncserver on the linux box to minimise this, and if so what configuration/file is used? Thanks. Nicholas ___ VNC-List mailing list VNC-List@realvnc.com To remove yourself from the list visit: http://www.realvnc.com/mailman/listinfo/vnc-list ___ VNC-List mailing list VNC-List@realvnc.com To remove yourself from the list visit: http://www.realvnc.com/mailman/listinfo/vnc-list ___ VNC-List mailing list VNC-List@realvnc.com To remove yourself from the list visit: http://www.realvnc.com/mailman/listinfo/vnc-list
RE: CPU overloading in WinVNC connecting to Linux box
Nicholas, VNC Viewer will only run when there are incoming updates to be processed. This will be the case if your remote desktop is changing rapidly, for example. VNC Viewer 3.3.7 will tend to consume more CPU, because it uses a less efficient method to draw the changes. Xvnc does not need to use polling to detect changes - since it is the X server, it is implicitly aware of all the changes that are taking place. To reiterate: - The only reason that VNC Viewer would use CPU cycles is if it is processing incoming updates, i.e. if things are changing on the VNC Server's desktop. - If your laptop is overheating then there is something fundamentally wrong with either its power management drivers or its hardware. Application software cannot cause a healthy system to overheat! Regards, Wez @ RealVNC Ltd. -Original Message- From: Nicholas Keown [mailto:[EMAIL PROTECTED] Sent: 02 March 2005 11:47 To: James Weatherall Cc: vnc-list@realvnc.com Subject: Re: CPU overloading in WinVNC connecting to Linux box James, thank for the reply. The task causing the problem is vncviewer.exe, hogging between 50 and 70% of CPU constantly, causing overheating of my windows notebook. When I connect to a windows box, there is no problem. I thought it could be related to the polling etc on the linux box, and was wondering if these setting can be altered for a standard fedora 3 install as a test. Has knowone else had these sorts of problems? I have seen it in other threads here, but it was blammed on a buggy earlier version. Thanks. ___ VNC-List mailing list VNC-List@realvnc.com To remove yourself from the list visit: http://www.realvnc.com/mailman/listinfo/vnc-list
RE: CPU overloading in WinVNC connecting to Linux box
I had a similar problem connecting to a mac running osxvnc; it turned out the culprit was a pulsating cursor on the mac, which was causing continuous changes on the mac screen. ___ VNC-List mailing list VNC-List@realvnc.com To remove yourself from the list visit: http://www.realvnc.com/mailman/listinfo/vnc-list
RE: CPU overloading in WinVNC connecting to Linux box
Dave, A pulsating cursor shouldn't keep VNC Viewer noticably loaded at all! It should be a really pretty minimal amount of traffic, minimal update to the display, and unelss it's flashing incredibly quickly, not too fast either. Cheers, Wez @ RealVNC Ltd. -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Dave Dyer Sent: 02 March 2005 18:18 To: Nicholas Keown Cc: vnc-list@realvnc.com Subject: RE: CPU overloading in WinVNC connecting to Linux box I had a similar problem connecting to a mac running osxvnc; it turned out the culprit was a pulsating cursor on the mac, which was causing continuous changes on the mac screen. ___ VNC-List mailing list VNC-List@realvnc.com To remove yourself from the list visit: http://www.realvnc.com/mailman/listinfo/vnc-list ___ VNC-List mailing list VNC-List@realvnc.com To remove yourself from the list visit: http://www.realvnc.com/mailman/listinfo/vnc-list
CPU overloading in WinVNC connecting to Linux box
My CPU is maxing out causing overheating on my notebook when connecting to a Linux Fedora Core 3 box. I use this application to connect to windows machines with no issues. I have downloaded and tested the viewers for v4.0 and 3.3.7 and the result is the same - maximum CPU usage on my windows client machine. Can anyone advise a fix for this? Can I configure the vncserver on the linux box to minimise this, and if so what configuration/file is used? Thanks. Nicholas ___ VNC-List mailing list VNC-List@realvnc.com To remove yourself from the list visit: http://www.realvnc.com/mailman/listinfo/vnc-list
