Keyboard backlight sysfs sometimes is missing on Dell laptops
Bug #1797304 reported by
Kai-Heng Feng
This bug affects 1 person
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
HWE Next |
Fix Released
|
Undecided
|
Unassigned | ||
linux (Ubuntu) |
Fix Released
|
Undecided
|
Unassigned | ||
Bionic |
Fix Released
|
Undecided
|
Unassigned | ||
linux-oem (Ubuntu) |
Fix Released
|
Undecided
|
Unassigned | ||
Bionic |
Fix Released
|
Undecided
|
Unassigned |
Bug Description
[Impact]
When the keyboard backlight sysfs is missing, userspace does not know
the current keyboard backlight brightness.
[Fix]
There's a loading order race condition, between the dell-smbios and its
backends, dell-smbios-
Build them as one module can solve the issue.
The last patch is what we want, but pulls the entire series as a whole.
[Test]
The backlight sysfs always exists with the patch. Userspace now knows
the current keyboard backlight brightness.
[Regression Potential]
Low. No functional change, as it simply links the modules together.
Limits to Dell machines.
CVE References
tags: | added: originate-from-1790789 somerville |
Changed in linux-oem (Ubuntu Bionic): | |
status: | New → Fix Committed |
Changed in linux (Ubuntu Bionic): | |
status: | New → Fix Committed |
Changed in linux-oem (Ubuntu): | |
status: | New → Fix Released |
tags: | added: cscc |
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This bug is missing log files that will aid in diagnosing the problem. While running an Ubuntu kernel (not a mainline or third-party kernel) please enter the following command in a terminal window:
apport-collect 1797304
and then change the status of the bug to 'Confirmed'.
If, due to the nature of the issue you have encountered, you are unable to run this command, please add a comment stating that fact and change the bug status to 'Confirmed'.
This change has been made by an automated script, maintained by the Ubuntu Kernel Team.