Using this instrumentation patch for debugging:
--- a/plugins/power/gpm-common.c
+++ b/plugins/power/gpm-common.c
@@ -51,6 +51,14 @@
int
gsd_power_backlight_abs_to_percentage (int min, int max, int value)
{
+ g_log (G_LOG_DOMAIN,
+ G_LOG_LEVEL_CRITICAL,
+ "file %s: line %d (%s): min is %u, max is %u, value is %u",
+ __FILE__,
+ __LINE__,
+ G_STRFUNC,
+ min, max, value);
+
g_return_val_if_fail (max > min, -1);
g_return_val_if_fail (value >= min, -1);
g_return_val_if_fail (value <= max, -1);
Before sleep:
17:34:05 gsd-power: file ../plugins/power/gpm-common.c: line 58
(gsd_power_backlight_abs_to_percentage): min is 0, max is 2, value is 0
17:34:05 gsd-power: file ../plugins/power/gpm-common.c: line 58
(gsd_power_backlight_abs_to_percentage): min is 2, max is 255, value is 12
17:34:05 gsd-power: file ../plugins/power/gpm-common.c: line 58
(gsd_power_backlight_abs_to_percentage): min is 2, max is 255, value is 12
After sleep:
17:35:29 gsd-power: gsd_power_backlight_abs_to_percentage: assertion 'max >
min' failed
17:35:29 gsd-power: file ../plugins/power/gpm-common.c: line 58
(gsd_power_backlight_abs_to_percentage): min is 4294967295, max is 4294967295,
value is 4294967295
17:35:29 gsd-power: gsd_power_backlight_abs_to_percentage: assertion 'max >
min' failed
17:35:29 gsd-power: file ../plugins/power/gpm-common.c: line 58
(gsd_power_backlight_abs_to_percentage): min is 4294967295, max is 4294967295,
value is 4294967295
17:35:29 gsd-power: gsd_power_backlight_abs_to_percentage: assertion 'max >
min' failed
17:35:29 gsd-power: file ../plugins/power/gpm-common.c: line 58
(gsd_power_backlight_abs_to_percentage): min is 4294967295, max is 4294967295,
value is 4294967295
17:35:29 gsd-power: gsd_power_backlight_abs_to_percentage: assertion 'max >
min' failed
17:35:29 gsd-power: file ../plugins/power/gpm-common.c: line 58
(gsd_power_backlight_abs_to_percentage): min is 4294967295, max is 4294967295,
value is 4294967295
17:35:28 gsd-power: gsd_power_backlight_abs_to_percentage: assertion 'max >
min' failed
--
You received this bug notification because you are a member of Desktop
Packages, which is subscribed to gnome-settings-daemon in Ubuntu.
https://bugs.launchpad.net/bugs/2081294
Title:
gsd_power_backlight_abs_to_percentage: assertion 'max > min' failed
Status in GNOME Settings Daemon:
New
Status in gnome-settings-daemon package in Ubuntu:
New
Bug description:
The key shortcuts as well as slider controls in GNOME for setting the
brightness of the screen on a amdgpu_bl1 laptop stops working after a
sleep/resume cycle. The GNOME logs are the following after pressing
the brightness increase and decrease Fn keys on the keyboard:
12:46:37 (sd-bright): amdgpu_bl1: Failed to write brightness to device:
Invalid argument
12:46:37 gsd-power: gsd_power_backlight_abs_to_percentage: assertion 'max >
min' failed
12:46:36 (sd-bright): amdgpu_bl1: Failed to write brightness to device:
Invalid argument
12:46:36 gsd-power: gsd_power_backlight_abs_to_percentage: assertion 'max >
min' failed
12:46:36 (sd-bright): amdgpu_bl1: Failed to write brightness to device:
Invalid argument
12:46:36 gsd-power: gsd_power_backlight_abs_to_percentage: assertion 'max >
min' failed
12:46:35 (sd-bright): amdgpu_bl1: Failed to write brightness to device:
Invalid argument
12:46:35 gsd-power: gsd_power_backlight_abs_to_percentage: assertion 'max >
min' failed
12:46:34 (sd-bright): amdgpu_bl1: Failed to write brightness to device:
Invalid argument
12:46:34 gsd-power: gsd_power_backlight_abs_to_percentage: assertion 'max >
min' failed
Setting the backlight manually using the sysfs interface or the gsd-
backlight-helper program still works:
$ sudo strace /usr/libexec/gsd-backlight-helper
/sys/class/backlight/amdgpu_bl1 15
...
openat(AT_FDCWD, "/sys/class/backlight/amdgpu_bl1/brightness", O_WRONLY) = 4
write(4, "15", 2) = 2
close(4) = 0
This is why I am filing this bug against gnome-settings-daemon and not
the kernel.
To manage notifications about this bug go to:
https://bugs.launchpad.net/gnome-settings-daemon/+bug/2081294/+subscriptions
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