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| Started by | Punit Agrawal <punit1.agrawal@toshiba.co.jp> |
|---|---|
| First post | 2020-02-03 09:30 +0100 |
| Last post | 2020-02-03 09:30 +0100 |
| Articles | 1 — 1 participant |
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Bug#911831: linux: Serial port of dw-abp-uart missing due to serial dev bus activation Punit Agrawal <punit1.agrawal@toshiba.co.jp> - 2020-02-03 09:30 +0100
| From | Punit Agrawal <punit1.agrawal@toshiba.co.jp> |
|---|---|
| Date | 2020-02-03 09:30 +0100 |
| Subject | Bug#911831: linux: Serial port of dw-abp-uart missing due to serial dev bus activation |
| Message-ID | <zvFhf-4TU-1@gated-at.bofh.it> |
On Thu, 25 Oct 2018 11:06:38 +0200 Paul van Tilburg <paulvt@debian.org>
wrote:
> Source: linux
> Version: 4.18.10-2
> Severity: normal
>
> Dear Maintainer,
>
> Since the upgrade of our system from Debian 9 (Stretch) to 10 (Buster), but
> also from Ubuntu 16.04 LTS (Xenial) to 18.04 LTS (Bionic), the serial port
> of our Atom E3950-based board can no longer be used.
>
> I have traced the cause to the enabling of CONFIG_SERIAL_DEV_BUS=y and
> CONFIG_SERIAL_DEV_CTRL_TTYPORT=y in the kernel config of versions
> 4.17.0-3 (Debian) and 4.15.0.36.38 (Ubuntu).
A fix was merged for this in upstream kernel. See commit
c5ee0b3104e0b ("serdev: Don't claim unsupported ACPI serial devices") It
was also backported to v4.19 stable kernel (released in v4.19.96).
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