Touchpad lag on DELL Latitude 7490
I have a new DELL Latitude 7490 with Ubuntu 18.04.1 and I am experiencing a little annoying bug related to the touchpad. When I don't use it for some time (more than 3~4 seconds), if then I sweep quickly my finger on it, the cursor gest "teleported" to his final position, without actually showing the path. It feels like the touchpad goes to a sort of "sleep mode", and then when it wakes up there is a small, but perceptible, lag that makes this jump of the cursor to happen. If I use the touchpad continuosly this does not happen, but only after some seconds of inactivity.
The same behavior happens with the trackpad (the "nipple").
I don't really know what to do, I tried updating the Linux kernel and changing all the possible libinput options, with no success.
Have you got any suggestions?
kernel touchpad dell synaptics libinput
asked Jan 26 at 18:34
Francesco BoccardoFrancesco Boccardo
666
|
show 2 more comments
I have a new DELL Latitude 7490 with Ubuntu 18.04.1 and I am experiencing a little annoying bug related to the touchpad. When I don't use it for some time (more than 3~4 seconds), if then I sweep quickly my finger on it, the cursor gest "teleported" to his final position, without actually showing the path. It feels like the touchpad goes to a sort of "sleep mode", and then when it wakes up there is a small, but perceptible, lag that makes this jump of the cursor to happen. If I use the touchpad continuosly this does not happen, but only after some seconds of inactivity.
The same behavior happens with the trackpad (the "nipple").
I don't really know what to do, I tried updating the Linux kernel and changing all the possible libinput options, with no success.
Have you got any suggestions?
kernel touchpad dell synaptics libinput
asked Jan 26 at 18:34
Francesco BoccardoFrancesco Boccardo
666
Try runninglibinput debug-events --verbose, and then reproduce the problem. It should record any motion you do; do you see prints between the moment you touched the touchpad, and the moment cursor got "teleported"? If you don't, try repeating it withevemu-recordcommand — are prints present there?
– Hi-Angel
Jan 26 at 21:18
@Hi-Angel Hi, thanks for your help. No, I don't see any prints during the lag in neither of the two commands. When the cursor gets "teleported" a bunch of prints appear all at once.
– Francesco Boccardo
Jan 26 at 21:47
Then it's likely a hardware problem. Still, it's possible that it can be worked around with ACPI and what not quirks, so I'd recommend to test with latest stable mainline kernel (4.20.5 at the moment), and then report a bug to bugzilla.kernel.org, "Product: drivers", "Component: Input Devices".
– Hi-Angel
Jan 26 at 23:01
@Hi-Angel What do you mean by hardware problem? Under Windows it was not showing this delay.
– Francesco Boccardo
Jan 27 at 1:26
Okay, then the touchpad probably requires some quirk to work correctly. I doubt an arbitrary person here can help with this (I can't), the best way to move forward would be the bug report. If you do report it, please add the link here, so that peoples with a similar problem could navigate straight to the report.
– Hi-Angel
Jan 27 at 10:55
|
show 2 more comments
I have a new DELL Latitude 7490 with Ubuntu 18.04.1 and I am experiencing a little annoying bug related to the touchpad. When I don't use it for some time (more than 3~4 seconds), if then I sweep quickly my finger on it, the cursor gest "teleported" to his final position, without actually showing the path. It feels like the touchpad goes to a sort of "sleep mode", and then when it wakes up there is a small, but perceptible, lag that makes this jump of the cursor to happen. If I use the touchpad continuosly this does not happen, but only after some seconds of inactivity.
The same behavior happens with the trackpad (the "nipple").
I don't really know what to do, I tried updating the Linux kernel and changing all the possible libinput options, with no success.
Have you got any suggestions?
kernel touchpad dell synaptics libinput
asked Jan 26 at 18:34
Francesco BoccardoFrancesco Boccardo
666
I have a new DELL Latitude 7490 with Ubuntu 18.04.1 and I am experiencing a little annoying bug related to the touchpad. When I don't use it for some time (more than 3~4 seconds), if then I sweep quickly my finger on it, the cursor gest "teleported" to his final position, without actually showing the path. It feels like the touchpad goes to a sort of "sleep mode", and then when it wakes up there is a small, but perceptible, lag that makes this jump of the cursor to happen. If I use the touchpad continuosly this does not happen, but only after some seconds of inactivity.
The same behavior happens with the trackpad (the "nipple").
I don't really know what to do, I tried updating the Linux kernel and changing all the possible libinput options, with no success.
Have you got any suggestions?
kernel touchpad dell synaptics libinput
kernel touchpad dell synaptics libinput
asked Jan 26 at 18:34
Francesco BoccardoFrancesco Boccardo
666
asked Jan 26 at 18:34
Francesco BoccardoFrancesco Boccardo
666
asked Jan 26 at 18:34
Francesco BoccardoFrancesco Boccardo
666
asked Jan 26 at 18:34
Francesco BoccardoFrancesco Boccardo
666
asked Jan 26 at 18:34
Francesco BoccardoFrancesco Boccardo
666
666
Try runninglibinput debug-events --verbose, and then reproduce the problem. It should record any motion you do; do you see prints between the moment you touched the touchpad, and the moment cursor got "teleported"? If you don't, try repeating it withevemu-recordcommand — are prints present there?
– Hi-Angel
Jan 26 at 21:18
@Hi-Angel Hi, thanks for your help. No, I don't see any prints during the lag in neither of the two commands. When the cursor gets "teleported" a bunch of prints appear all at once.
– Francesco Boccardo
Jan 26 at 21:47
Then it's likely a hardware problem. Still, it's possible that it can be worked around with ACPI and what not quirks, so I'd recommend to test with latest stable mainline kernel (4.20.5 at the moment), and then report a bug to bugzilla.kernel.org, "Product: drivers", "Component: Input Devices".
– Hi-Angel
Jan 26 at 23:01
@Hi-Angel What do you mean by hardware problem? Under Windows it was not showing this delay.
– Francesco Boccardo
Jan 27 at 1:26
Okay, then the touchpad probably requires some quirk to work correctly. I doubt an arbitrary person here can help with this (I can't), the best way to move forward would be the bug report. If you do report it, please add the link here, so that peoples with a similar problem could navigate straight to the report.
– Hi-Angel
Jan 27 at 10:55
|
show 2 more comments
Try runninglibinput debug-events --verbose, and then reproduce the problem. It should record any motion you do; do you see prints between the moment you touched the touchpad, and the moment cursor got "teleported"? If you don't, try repeating it withevemu-recordcommand — are prints present there?
– Hi-Angel
Jan 26 at 21:18
@Hi-Angel Hi, thanks for your help. No, I don't see any prints during the lag in neither of the two commands. When the cursor gets "teleported" a bunch of prints appear all at once.
– Francesco Boccardo
Jan 26 at 21:47
Then it's likely a hardware problem. Still, it's possible that it can be worked around with ACPI and what not quirks, so I'd recommend to test with latest stable mainline kernel (4.20.5 at the moment), and then report a bug to bugzilla.kernel.org, "Product: drivers", "Component: Input Devices".
– Hi-Angel
Jan 26 at 23:01
@Hi-Angel What do you mean by hardware problem? Under Windows it was not showing this delay.
– Francesco Boccardo
Jan 27 at 1:26
Okay, then the touchpad probably requires some quirk to work correctly. I doubt an arbitrary person here can help with this (I can't), the best way to move forward would be the bug report. If you do report it, please add the link here, so that peoples with a similar problem could navigate straight to the report.
– Hi-Angel
Jan 27 at 10:55
Try running
libinput debug-events --verbose, and then reproduce the problem. It should record any motion you do; do you see prints between the moment you touched the touchpad, and the moment cursor got "teleported"? If you don't, try repeating it with evemu-record command — are prints present there?– Hi-Angel
Jan 26 at 21:18
Try running
libinput debug-events --verbose, and then reproduce the problem. It should record any motion you do; do you see prints between the moment you touched the touchpad, and the moment cursor got "teleported"? If you don't, try repeating it with evemu-record command — are prints present there?– Hi-Angel
Jan 26 at 21:18
@Hi-Angel Hi, thanks for your help. No, I don't see any prints during the lag in neither of the two commands. When the cursor gets "teleported" a bunch of prints appear all at once.
– Francesco Boccardo
Jan 26 at 21:47
@Hi-Angel Hi, thanks for your help. No, I don't see any prints during the lag in neither of the two commands. When the cursor gets "teleported" a bunch of prints appear all at once.
– Francesco Boccardo
Jan 26 at 21:47
Then it's likely a hardware problem. Still, it's possible that it can be worked around with ACPI and what not quirks, so I'd recommend to test with latest stable mainline kernel (4.20.5 at the moment), and then report a bug to bugzilla.kernel.org, "Product: drivers", "Component: Input Devices".
– Hi-Angel
Jan 26 at 23:01
Then it's likely a hardware problem. Still, it's possible that it can be worked around with ACPI and what not quirks, so I'd recommend to test with latest stable mainline kernel (4.20.5 at the moment), and then report a bug to bugzilla.kernel.org, "Product: drivers", "Component: Input Devices".
– Hi-Angel
Jan 26 at 23:01
@Hi-Angel What do you mean by hardware problem? Under Windows it was not showing this delay.
– Francesco Boccardo
Jan 27 at 1:26
@Hi-Angel What do you mean by hardware problem? Under Windows it was not showing this delay.
– Francesco Boccardo
Jan 27 at 1:26
Okay, then the touchpad probably requires some quirk to work correctly. I doubt an arbitrary person here can help with this (I can't), the best way to move forward would be the bug report. If you do report it, please add the link here, so that peoples with a similar problem could navigate straight to the report.
– Hi-Angel
Jan 27 at 10:55
Okay, then the touchpad probably requires some quirk to work correctly. I doubt an arbitrary person here can help with this (I can't), the best way to move forward would be the bug report. If you do report it, please add the link here, so that peoples with a similar problem could navigate straight to the report.
– Hi-Angel
Jan 27 at 10:55
|
show 2 more comments
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Try running
libinput debug-events --verbose, and then reproduce the problem. It should record any motion you do; do you see prints between the moment you touched the touchpad, and the moment cursor got "teleported"? If you don't, try repeating it withevemu-recordcommand — are prints present there?– Hi-Angel
Jan 26 at 21:18
@Hi-Angel Hi, thanks for your help. No, I don't see any prints during the lag in neither of the two commands. When the cursor gets "teleported" a bunch of prints appear all at once.
– Francesco Boccardo
Jan 26 at 21:47
Then it's likely a hardware problem. Still, it's possible that it can be worked around with ACPI and what not quirks, so I'd recommend to test with latest stable mainline kernel (4.20.5 at the moment), and then report a bug to bugzilla.kernel.org, "Product: drivers", "Component: Input Devices".
– Hi-Angel
Jan 26 at 23:01
@Hi-Angel What do you mean by hardware problem? Under Windows it was not showing this delay.
– Francesco Boccardo
Jan 27 at 1:26
Okay, then the touchpad probably requires some quirk to work correctly. I doubt an arbitrary person here can help with this (I can't), the best way to move forward would be the bug report. If you do report it, please add the link here, so that peoples with a similar problem could navigate straight to the report.
– Hi-Angel
Jan 27 at 10:55