On Wed, Jul 21, 2021 at 12:53 PM Hans Schultz <hans.schultz@xxxxxxxxxxx> wrote: > > On Wed, 2021-07-21 at 21:31 +0200, Hans Schultz wrote: > > Hi Dmitry, > > > > On Wed, 2021-07-21 at 12:14 -0700, Dmitry Torokhov wrote: > > > On Wed, Jul 21, 2021 at 11:09 AM Hans Schultz < > > > hans.schultz@xxxxxxxxxxx> wrote: > > > > > > > > On Wed, 2021-07-21 at 10:48 -0700, Dmitry Torokhov wrote: > > > > > Hi Hans, > > > > > > > > > > On Sun, May 30, 2021 at 2:12 AM Hans Schultz < > > > > > hans.schultz@xxxxxxxxxxx> wrote: > > > > > > > > > > > > Hello, > > > > > > I have a problem getting my Elantech touchpad to work with > > > > > > the > > > > > > mainline > > > > > > kernels, and I need some assistance with the code to resolve > > > > > > the > > > > > > problem. > > > > > > The kernels that have tried are 5.9.11 and 5.11.11. > > > > > > > > > > > > With boot parameters i8042.notimeout i8042.nomux, the > > > > > > touchpad is > > > > > > detected but does not work. There is absolutely no response > > > > > > from > > > > > > it > > > > > > with any hid modules loaded. > > > > > > > > > > > > It is reported and seen working on a Lubuntu distro (bionic > > > > > > kernel) > > > > > > when inserting the i2c_hid module. The insertion of the > > > > > > i2c_hid > > > > > > module > > > > > > pulls in the hid_multitouch module when it works, no boot > > > > > > parameters > > > > > > necessary. > > > > > > In the case where it does not work, insering the i2c_hid > > > > > > module > > > > > > does > > > > > > not pull in the hid_multitouch module. > > > > > > > > > > > > I have the bionic kernel code, but I have not as of yet been > > > > > > able > > > > > > to > > > > > > detect what makes it work in contrast to the kernel.org > > > > > > kernels. > > > > > > > > > > > > This I think should lead to a kernel patch. > > > > > > > > > > There is not much to go on with. What is the hardware, your > > > > > kernel > > > > > .config, dmesg from unsuccessful boot? If you have logs from > > > > > the > > > > > working kernel that would help too. > > > > > > > > > > Thanks. > > > > > > > > > > > > > The best info I have on the hardware is from Xorg log with the > > > > working > > > > Lubuntu kernel: > > > > [ 130.980] (II) Loading > > > > /usr/lib/xorg/modules/input/synaptics_drv.so > > > > [ 130.982] (II) Module synaptics: vendor="X.Org Foundation" > > > > [ 130.982] (II) Using input driver 'synaptics' for '0X45 0X4C > > > > 0X41 > > > > 0:00 > > > > 04F3:308C Touchpad' > > > > > > > > I might be able to get the kernel messages when inserting the > > > > working > > > > module, but I think it will not tell much more. > > > > > > OK, if you say so. Then the only suggestion I have is to verify > > > that > > > your kernel config enables all necessary options for your hardware. > > > I'd double check if you have Designware I2C controller enabled, > > > ACPI > > > LPSS, etc. > > > > > > > To me it is clearly a code issue as the working kernel pulls in > > > > hid_multitouch when inserting i2c_hid, while the non-working does > > > > not. > > > > > > > > All kernels I have tried up to now from kernel.org do not work. > > > > The > > > > latest being 5.13.4. > > > > > > Thanks. > > > > > > > I have a thread with all the dmesg info for both the working and non- > > working cases here : > > https://gitlab.freedesktop.org/libinput/libinput/-/issues/544 > > > > Benjamin has also asked for the acpidump info, which is there. (funny > > as the responses to my problem come at the same time after a long > > time. > > :-) ) > > > > I will check my .config... > > > > Thanks, > > Hans > > Here are my I2C kernel settings. I only added what I could see as with > Intel hw, so no Designware! However if you consult the dmesg from the working kernel you will observe: [ 79.964148] input: 0X45 0X4C 0X41 0:00 04F3:308C Mouse as /devices/pci0000:00/0000:00:15.3/i2c_designware.1/i2c-8/i2c-0X45 0X4C 0X41 0:00/0018:04F3:308C.0002/input/input24 [ 79.964222] input: 0X45 0X4C 0X41 0:00 04F3:308C Touchpad as /devices/pci0000:00/0000:00:15.3/i2c_designware.1/i2c-8/i2c-0X45 0X4C 0X41 0:00/0018:04F3:308C.0002/input/input26 so it clearly uses designware-compatible IP block even though it is an Intel system. Can you try grabbing config from the working kernel and use it if you want to compile your own? There are a lot of hardware dependencies in modern systems that may not be immediately obvious. Thanks. -- Dmitry
