hello.
can anyone offer advice for setting up this mouse within the logitech software thingy
maybe:
-explain polling rate
-explain and offer suggestions for dpi sensitivity
anything else too! maybe a profile you made if you have the same mouse!
thanks!
logitech g400
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Re: logitech g400
archlinux on polling rate
If you have invested in a high resolution mouse, adjusting the USB polling rate is a common trick to utilise the added precision it brings. The polling rate (or report rate) determines how often the mouse sends information to your computer. Measured in Hz, this setting equates to lag time (in ms).
By default, the USB polling rate is set at 125hz. The table below represents combinations of Hz values and their corresponding delay time:
Hz ms
1000 1
500 2
250 4
125 8
100 10
If the polling rate is set at 125 Hz, the mouse cursor can only be updated every 8 milliseconds. In situations where lag is critical (for example games), it is useful to decrease this value to as little as possible. Increasing the polling interval will improve precision at the tradeoff of using more CPU resources, therefore care should be taken when adjusting this value.
wikipedia on dpi
The computer industry often measures mouse sensitivity in terms of counts per inch (CPI), commonly expressed incorrectly as dots per inch (DPI) – the number of steps the mouse will report when it moves one inch. In early mice, this specification was called pulses per inch (ppi).[15] If the default mouse-tracking condition involves moving the cursor by one screen-pixel or dot on-screen per reported step, then the CPI does equate to DPI: dots of cursor motion per inch of mouse motion. The CPI or DPI as reported by manufacturers depends on how they make the mouse; the higher the CPI, the faster the cursor moves with mouse movement. However, software can adjust the mouse sensitivity, making the cursor move faster or slower than its CPI. Current software can change the speed of the cursor dynamically, taking into account the mouse's absolute speed and the movement from the last stop-point. In most software[specify] this setting is named "speed", referring to "cursor precision". However, some software[specify] names this setting "acceleration", but this term is in fact incorrect. The mouse acceleration, in the majority of mouse software, refers to the setting allowing the user to modify the cursor acceleration: the change in speed of the cursor over time while the mouse movement is constant.
For simple software, when the mouse starts to move, the software will count the number of "counts" or "mickeys" received from the mouse and will move the cursor across the screen by that number of pixels (or multiplied by a rate factor, typically less than 1). The cursor will move slowly on the screen, having a good precision. When the movement of the mouse passes the value set for "threshold", the software will start to move the cursor more quickly, with a greater rate factor. Usually, the user can set the value of the second rate factor by changing the "acceleration" setting.
Operating systems sometimes apply acceleration, referred to as "ballistics", to the motion reported by the mouse. For example, versions of Windows prior to Windows XP doubled reported values above a configurable threshold, and then optionally doubled them again above a second configurable threshold. These doublings applied separately in the X and Y directions, resulting in very nonlinear response
My last mouse had a sensitivty adjustment behind the wheel (razer lachesis, and the upper end of this scale they called 5600 dpi with 1000hz polling, I would have my in-game sensitivity up mid-to-high and adjust the on-the-fly down depending on whim), and my game suffered for it.
When I got into a mouse where I had to set it and forget it,( razer naga , now its pinned to 5600 dpi w/ 1000hz polling ,not adjustable on-the-fly) it was better for me. Now I leave my in-game sensitivity set at 4.5.
If you have invested in a high resolution mouse, adjusting the USB polling rate is a common trick to utilise the added precision it brings. The polling rate (or report rate) determines how often the mouse sends information to your computer. Measured in Hz, this setting equates to lag time (in ms).
By default, the USB polling rate is set at 125hz. The table below represents combinations of Hz values and their corresponding delay time:
Hz ms
1000 1
500 2
250 4
125 8
100 10
If the polling rate is set at 125 Hz, the mouse cursor can only be updated every 8 milliseconds. In situations where lag is critical (for example games), it is useful to decrease this value to as little as possible. Increasing the polling interval will improve precision at the tradeoff of using more CPU resources, therefore care should be taken when adjusting this value.
wikipedia on dpi
The computer industry often measures mouse sensitivity in terms of counts per inch (CPI), commonly expressed incorrectly as dots per inch (DPI) – the number of steps the mouse will report when it moves one inch. In early mice, this specification was called pulses per inch (ppi).[15] If the default mouse-tracking condition involves moving the cursor by one screen-pixel or dot on-screen per reported step, then the CPI does equate to DPI: dots of cursor motion per inch of mouse motion. The CPI or DPI as reported by manufacturers depends on how they make the mouse; the higher the CPI, the faster the cursor moves with mouse movement. However, software can adjust the mouse sensitivity, making the cursor move faster or slower than its CPI. Current software can change the speed of the cursor dynamically, taking into account the mouse's absolute speed and the movement from the last stop-point. In most software[specify] this setting is named "speed", referring to "cursor precision". However, some software[specify] names this setting "acceleration", but this term is in fact incorrect. The mouse acceleration, in the majority of mouse software, refers to the setting allowing the user to modify the cursor acceleration: the change in speed of the cursor over time while the mouse movement is constant.
For simple software, when the mouse starts to move, the software will count the number of "counts" or "mickeys" received from the mouse and will move the cursor across the screen by that number of pixels (or multiplied by a rate factor, typically less than 1). The cursor will move slowly on the screen, having a good precision. When the movement of the mouse passes the value set for "threshold", the software will start to move the cursor more quickly, with a greater rate factor. Usually, the user can set the value of the second rate factor by changing the "acceleration" setting.
Operating systems sometimes apply acceleration, referred to as "ballistics", to the motion reported by the mouse. For example, versions of Windows prior to Windows XP doubled reported values above a configurable threshold, and then optionally doubled them again above a second configurable threshold. These doublings applied separately in the X and Y directions, resulting in very nonlinear response
My last mouse had a sensitivty adjustment behind the wheel (razer lachesis, and the upper end of this scale they called 5600 dpi with 1000hz polling, I would have my in-game sensitivity up mid-to-high and adjust the on-the-fly down depending on whim), and my game suffered for it.
When I got into a mouse where I had to set it and forget it,( razer naga , now its pinned to 5600 dpi w/ 1000hz polling ,not adjustable on-the-fly) it was better for me. Now I leave my in-game sensitivity set at 4.5.