Hi, 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: CONFIG_ACPI_REV_OVERRIDE_POSSIBLE=y The following boot errors no longer occur: [ 1.972457] pci 0000:00:1c.2: Error enabling bridge (-16), continuing [ 1.973304] r8169 0000:03:00.0 (unnamed net_device) (uninitialized): enable failure 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). Regards, Hans _______________________________________________ kernel mailing list -- kernel@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe send an email to kernel-leave@xxxxxxxxxxxxxxxxxxxxxxx
