On 26-12-17 19:11, Shaun Assam wrote:
Hello Kernel Maintainers,
I would like to submit a fix for bug #1409801 regarding the ethernet
adapter not working on Dell Latitude 3350 (https://bugzilla.redhat.com/
show_bug.cgi?id=1409801). This issue is only related to the Fedora
kernels from 4.4+, and does not affect the upstream kernels used by
other distributions like Ubuntu or Arch.
This issue can be resolved by turning on the ACPI_REV_OVERRIDE option
in the kernel config files for i686 and x86_64. Currently the
configuration is set to:
# CONFIG_ACPI_REV_OVERRIDE_POSSIBLE is not set
By changing it to:
The following boot errors no longer occur:
[ 1.972457] pci 0000:00:1c.2: Error enabling bridge (-16),
[ 1.973304] r8169 0000:03:00.0 (unnamed net_device) (uninitialized):
In addition to fixing the ethernet issue, it also fixes an issue with
the Bluetooth device on the laptop automatically switching on after
shutdown/reboot (not when resuming from sleep/hibernate). The Bluetooth
icon would appear in the GNOME System Menu and would have to manually
be turned off. Since applying the ACPI_REV fix, this is no longer a
problem. I have been testing this change for the last three days and
have not encountered any issues resulting from this fix.
The issue regarding this bug has been patched in the upstream kernel
for sometime and is already included in the code for current versions
of the Fedora kernel (see drivers/acpi/blacklist.c for details -- the
code applies to Dell laptops/computers).
I would like to request this fix be included in future Fedora kernel
releases so we may close this bug and possibly fix other, opened, bugs
related to this configuration. I have attached the config files to this
email for your convenience (around line 75).
Thank you for tracking this down. I've just looked at the source-code
implementing this and by default enabling this does not change anything
except for a couple of (Dell) systems in a DMI quirk list or when someone
explicitly asks for this on the kernel cmdline, so turning this on seems
safe to me.
But the ultimate decision on this is up to the Fedora kernel team
(when they get back from their holidays).