ThinkPad L13 Gen2 has both touchpad and trackpoint.
PNP: LEN2146 PNP0f13
With the default protocol (elantech-smbus) trackpoint is not operating,
while touchpad does. Changing to elantech renders both operational.
Signed-off-by: Nikolai Kostrigin <[email protected]>
---
drivers/input/mouse/elantech.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/drivers/input/mouse/elantech.c b/drivers/input/mouse/elantech.c
index 90f8765f9efc..c4c3fa5828d8 100644
--- a/drivers/input/mouse/elantech.c
+++ b/drivers/input/mouse/elantech.c
@@ -1776,6 +1776,7 @@ static const char * const i2c_blacklist_pnp_ids[] = {
* These are known to not be working properly as bits are missing
* in elan_i2c.
*/
+ "LEN2146", /* ThinkPad L13 Gen2 */
NULL
};
--
2.29.2
Hi Nikolai,
On Mon, Feb 8, 2021 at 9:01 AM Nikolai Kostrigin <[email protected]> wrote:
>
> ThinkPad L13 Gen2 has both touchpad and trackpoint.
> PNP: LEN2146 PNP0f13
> With the default protocol (elantech-smbus) trackpoint is not operating,
> while touchpad does. Changing to elantech renders both operational.
>
> Signed-off-by: Nikolai Kostrigin <[email protected]>
Instead of downgrading the capabilities of the touchpad, couldn't we
fix the trackpoint issues?
I am surprised elantech doesn't work with the trackpoint, because I am
pretty sure I wrote patches in that regard. Which kernel version have
you been testing?
Cheers,
Benjamin
> ---
> drivers/input/mouse/elantech.c | 1 +
> 1 file changed, 1 insertion(+)
>
> diff --git a/drivers/input/mouse/elantech.c b/drivers/input/mouse/elantech.c
> index 90f8765f9efc..c4c3fa5828d8 100644
> --- a/drivers/input/mouse/elantech.c
> +++ b/drivers/input/mouse/elantech.c
> @@ -1776,6 +1776,7 @@ static const char * const i2c_blacklist_pnp_ids[] = {
> * These are known to not be working properly as bits are missing
> * in elan_i2c.
> */
> + "LEN2146", /* ThinkPad L13 Gen2 */
> NULL
> };
>
> --
> 2.29.2
>
Hi, Benjamin!
08.02.2021 11:06, Benjamin Tissoires пишет:
> Hi Nikolai,
>
> On Mon, Feb 8, 2021 at 9:01 AM Nikolai Kostrigin <[email protected]> wrote:
>> ThinkPad L13 Gen2 has both touchpad and trackpoint.
>> PNP: LEN2146 PNP0f13
>> With the default protocol (elantech-smbus) trackpoint is not operating,
>> while touchpad does. Changing to elantech renders both operational.
>>
>> Signed-off-by: Nikolai Kostrigin <[email protected]>
> Instead of downgrading the capabilities of the touchpad, couldn't we
> fix the trackpoint issues?
Yes, I consider fixing the issue would be better than downgrading
touchpad capabilities.
Blacklisting was the first and most obvious idea to test.
I'm eager to perform additional diagnostics to choose a better solution.
Your advice would be appreciated.
>
> I am surprised elantech doesn't work with the trackpoint, because I am
> pretty sure I wrote patches in that regard. Which kernel version have
> you been testing?
The patch was tested with 5.10.13 only, but the trackpoint behaviour is
the same on 5.4.92.
> Cheers,
> Benjamin
>
>
>> ---
>> drivers/input/mouse/elantech.c | 1 +
>> 1 file changed, 1 insertion(+)
>>
>> diff --git a/drivers/input/mouse/elantech.c b/drivers/input/mouse/elantech.c
>> index 90f8765f9efc..c4c3fa5828d8 100644
>> --- a/drivers/input/mouse/elantech.c
>> +++ b/drivers/input/mouse/elantech.c
>> @@ -1776,6 +1776,7 @@ static const char * const i2c_blacklist_pnp_ids[] = {
>> * These are known to not be working properly as bits are missing
>> * in elan_i2c.
>> */
>> + "LEN2146", /* ThinkPad L13 Gen2 */
>> NULL
>> };
>>
>> --
>> 2.29.2
>>
--
Best regards,
Nikolai Kostrigin