Unfortunately for a legacy mouse a single M or B character suffices as identification. Microsoft has even provided the sourcecode as a WDK sample.ĭuring detection the ports switches to 1200-7-N-1 mode while asserting DTR+ RTS to which a response is expected within 200 ms, with a couple of retries in case of failure.
#Virtual serial port driver delete serial
This driver implements support for legacy serial mice along with serial plug-and-play. It turns out that mouse detection in Windows is normally handled by the serenum.sys filter driver. You then need to restart the computer, which should now start correctly and not attempt to discover a serial mouse. Specifies that the service should not be started.Ī reg edit command would be as follows: REG ADD "HKLM\SYSTEM\CurrentControlSet\Services\sermouse" /V Start /T REG_DWORD /F /D 4 Specifies that the service does not start until the user starts it manually, such as by using Device Manager.Ĥ Disabled.
![virtual serial port driver delete virtual serial port driver delete](https://s.getwinpcsoft.com/screenshots/87/87017_2.jpg)
Specifies that the service is loaded or started automatically.ģ Manual. Specifies that the driver is loaded at kernel initialization.Ģ Automatic (loaded by Service Control Manager). Components of the driver stack for the boot (startup) volume must be loaded by the kernel loader.ġ System (loaded by I/O subsystem). Here is a list of all valid Start values: 0 Boot (loaded by kernel loader). I just encountered this problem myself on Windows 7 Professional 圆4, and a solution that worked for me was to go into the registry and edit the following value: Location: HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\sermouseĬhange Value to 4 and it will stop this problem occurring. Would sending only 7-bit ASCII suffice? Are there any other devices I need to worry about being detected as? The only problem is that I'm not quite certain what patterns to avoid.Īpparently Microsoft's Mouse protocol consists of packets of four bytes where the MSB of the first is set and that of the last three is clear.
![virtual serial port driver delete virtual serial port driver delete](https://theitbros.com/wp-content/uploads/2020/06/word-image-56.png)
Instead I'd like to avoid the problem by changing our protocol to not send any data which may get us misidentified as a mouse. Especially not when the fix is dependent on the Windows version and the user may well be using a bus mouse. That it is a lot to demand from our users however and I'd rather not have our application messing around with the user's registry. The problem is that the data we are sending occasionally gets incorrectly identified by Windows as a bus mouse, after which the "Microsoft Serial Ballpoint" driver is loaded and the mouse pointer starts jumping around on the screen and randomly clicking on things.Ī bit of Googling reveals that is an old and well-known problem with serial devices where the usual work-around is a bit of registry hacking to disable the offending driver.
#Virtual serial port driver delete Pc
I'm working on a device which communicates with a PC through a (virtual) serial port.