diff options
Diffstat (limited to 'abs/core/pm-utils/13-49bluetooth-sync.patch')
| -rw-r--r-- | abs/core/pm-utils/13-49bluetooth-sync.patch | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/abs/core/pm-utils/13-49bluetooth-sync.patch b/abs/core/pm-utils/13-49bluetooth-sync.patch new file mode 100644 index 0000000..b41f32c --- /dev/null +++ b/abs/core/pm-utils/13-49bluetooth-sync.patch @@ -0,0 +1,43 @@ +From 640b53438c20818b3e344343b58b1f1765606a85 Mon Sep 17 00:00:00 2001 +From: Martin Pitt <martin.pitt@ubuntu.com> +Date: Mon, 31 Jan 2011 15:30:01 +0100 +Subject: [PATCH] 49bluetooth: Wait for btusb module to get unused + +The 49bluetooth hook disables /proc/acpi/ibm/bluetooth but this isn't +synchronous, i. e. it doesn't wait until the module usage count actually drops +to 0. Due to that, it's impossible to add btusb to SUSPEND_MODULES (on some +models/older kernels you need to do that to fix suspend problems), as at that +point the module is still in use. + +On my system (ThinkPad X201) the module takes between 0.3 and 0.5 seconds to +unload, so use 100 ms wait steps with a timeout of 2 seconds. + +Bug: https://bugs.freedesktop.org//show_bug.cgi?id=33759 +Bug-Ubuntu: https://launchpad.net/bugs/698331 +--- + pm/sleep.d/49bluetooth | 9 +++++++++ + 1 files changed, 9 insertions(+), 0 deletions(-) + +diff --git a/pm/sleep.d/49bluetooth b/pm/sleep.d/49bluetooth +index d46ba49..0dc1909 100755 +--- a/pm/sleep.d/49bluetooth ++++ b/pm/sleep.d/49bluetooth +@@ -12,6 +12,15 @@ suspend_bluetooth() + if grep -q enabled /proc/acpi/ibm/bluetooth; then + savestate ibm_bluetooth enable + echo disable > /proc/acpi/ibm/bluetooth ++ ++ # wait for up to 2 seconds for the module to actually get ++ # unused ++ TIMEOUT=20 ++ while [ $TIMEOUT -ge 0 ]; do ++ [ `cat /sys/module/btusb/refcnt` = 0 ] && break ++ TIMEOUT=$((TIMEOUT-1)) ++ sleep 0.1 ++ done + else + savestate ibm_bluetooth disable + fi +-- +1.7.2.3 + |