** Changed in: linux (Ubuntu)
Assignee: (unassigned) => Nisankh Acharjya (nisankhubuntu)
--
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1797772
Title:
ideapad_laptop disables WiFi/BT radios on Lenovo Y530
Status in linux package in Ubuntu:
Incomplete
Bug description:
I've been working with a user that has a Lenovo Legion Y530-15ICH
where booting Ubuntu 18.10 (kernel 4.18.0-8) results in the radios
being disabled by the platform driver "ideapad-laptop".
Unloading or blacklisting the module solves the issue but disables
other platform ACPI interfaces:
$ sudo tee /etc/modprobe.d/ideapad.conf <<< "blacklist ideapad_laptop"
The system has the most recent firmware:
[ 0.000000] DMI: LENOVO 81FV/LNVNB161216, BIOS 8JCN44WW 08/13/2018
The wifi device is:
00:14.3 Network controller [0280]: Intel Corporation Wireless-AC 9560
[Jefferson Peak] [8086:a370] (rev 10)
Subsystem: Intel Corporation Wireless-AC 9560 [Jefferson Peak] [8086:0034]
Kernel driver in use: iwlwifi
We investigated the issue extensively and built the module with
additional logic without solving the issue. It is well-known that some
Lenovo models do not have a separate hardware radio kill switch (this
model uses hot-keys Fn + F7 for 'Airplane mode') and need to use a DMI
match to disable the rfkill logic.
We used dmidecode to get the correct Version string:
Handle 0x0001, DMI type 1, 27 bytes
System Information
Manufacturer: LENOVO
Product Name: 81FV
Version: Lenovo Legion Y530-15ICH
Serial Number: PF18CD10
UUID: A44F71C1-5E3D-11E8-9379-8C16458E3F9D
Wake-up Type: Power Switch
SKU Number: LENOVO_MT_81FV_BU_idea_FM_Legion Y530-15ICH
Family: Legion Y530-15ICH
and added it to no_hw_rfkill_list[]:
{
.ident = "Lenovo Legion Y530-15ICH",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo Legion Y530-15ICH"),
},
},
However, rfkill was still listing the platform devices "ideapad_wlan"
and "ideapad_bluetooth":
0: ideapad_wlan: Wireless LAN
Soft blocked: no
Hard blocked: yes
1: ideapad_bluetooth: Bluetooth
Soft blocked: yes
Hard blocked: yes
3: phy0: Wireless LAN
Soft blocked: no
Hard blocked: no
4: hci0: Bluetooth
Soft blocked: yes
Hard blocked: no
/sys/class/rfkill/rfkill0/hard=1
/sys/class/rfkill/rfkill0/index=0
/sys/class/rfkill/rfkill0/name=ideapad_wlan
/sys/class/rfkill/rfkill0/persistent=1
/sys/class/rfkill/rfkill0/soft=0
/sys/class/rfkill/rfkill0/state=2
/sys/class/rfkill/rfkill0/type=wlan
/sys/class/rfkill/rfkill0/uevent=RFKILL_NAME=ideapad_wlan RFKILL_TYPE=wlan
RFKILL_STATE=2
/sys/class/rfkill/rfkill1/hard=1
/sys/class/rfkill/rfkill1/index=1
/sys/class/rfkill/rfkill1/name=ideapad_bluetooth
/sys/class/rfkill/rfkill1/persistent=1
/sys/class/rfkill/rfkill1/soft=1
/sys/class/rfkill/rfkill1/state=2
/sys/class/rfkill/rfkill1/type=bluetooth
/sys/class/rfkill/rfkill1/uevent=RFKILL_NAME=ideapad_bluetooth
RFKILL_TYPE=bluetooth RFKILL_STATE=2
/sys/class/rfkill/rfkill3/hard=0
/sys/class/rfkill/rfkill3/index=3
/sys/class/rfkill/rfkill3/name=phy0
/sys/class/rfkill/rfkill3/persistent=0
/sys/class/rfkill/rfkill3/soft=0
/sys/class/rfkill/rfkill3/state=1
/sys/class/rfkill/rfkill3/type=wlan
/sys/class/rfkill/rfkill3/uevent=RFKILL_NAME=phy0 RFKILL_TYPE=wlan
RFKILL_STATE=1
/sys/class/rfkill/rfkill4/hard=0
/sys/class/rfkill/rfkill4/index=4
/sys/class/rfkill/rfkill4/name=hci0
/sys/class/rfkill/rfkill4/persistent=0
/sys/class/rfkill/rfkill4/soft=1
/sys/class/rfkill/rfkill4/state=0
/sys/class/rfkill/rfkill4/type=bluetooth
/sys/class/rfkill/rfkill4/uevent=RFKILL_NAME=hci0 RFKILL_TYPE=bluetooth
RFKILL_STATE=0
We then added printk(KERN_NOTICE ... in the module's
platform_driver.probe function ideapad_acpi_add() both at entry and
later to report the DMI and status of the hardware switch control
flag:
diff -u
/home/all/SourceCode/linux/linux/drivers/platform/x86/ideapad-laptop.c
./ideapad-laptop.c
--- /home/all/SourceCode/linux/linux/drivers/platform/x86/ideapad-laptop.c
2018-10-14 01:46:49.506088219 +0100
+++ ./ideapad-laptop.c 2018-10-14 06:19:48.843813865 +0100
@@ -1147,6 +1147,13 @@
},
},
{
+ .ident = "Lenovo Legion Y530-15ICH",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
+ DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo Legion
Y530-15ICH"),
+ },
+ },
+ {
.ident = "Lenovo Legion Y720-15IKB",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
@@ -1239,6 +1246,7 @@
int cfg;
struct ideapad_private *priv;
struct acpi_device *adev;
+ const char *dmi_vendor, *dmi_version;
ret = acpi_bus_get_device(ACPI_HANDLE(&pdev->dev), &adev);
if (ret)
@@ -1257,6 +1265,10 @@
priv->platform_device = pdev;
priv->has_hw_rfkill_switch = !dmi_check_system(no_hw_rfkill_list);
+ dmi_vendor = dmi_get_system_info(DMI_SYS_VENDOR);
+ dmi_version = dmi_get_system_info(DMI_PRODUCT_VERSION);
+ printk(KERN_NOTICE "DMI: %s, %s. has_hw_rfkill_switch=%d\n",
dmi_vendor, dmi_version, priv->has_hw_rfkill_switch);
+
ret = ideapad_sysfs_init(priv);
if (ret)
return ret;
And this revealed that the function is not being called - the
KERN_NOTICE messages do not appear in 'dmesg' output.
This suggests:
static const struct acpi_device_id ideapad_device_ids[] = {
{ "VPC2004", 0},
is not being matched via platform_driver.driver.acpi_match_table =
ACPI_PTR(ideapad_device_ids),
We then decompiled the ACPI DSDT and confirmed that _HID is being set
to VPC2004:
grep -C4 VPC2004 dsdt.dsl
Scope (\_SB.PCI0.LPCB.EC0)
{
Device (VPC0)
{
Name (_HID, "VPC2004") // _HID: Hardware ID
Name (_UID, Zero) // _UID: Unique ID
Name (_VPC, 0xFC0DF516)
Name (VPCD, Zero)
Method (_STA, 0, NotSerialized) // _STA: Status
At this point we're not sure what the next step should be. Wifi works
correctly with the module blacklisted but it would be good to fix this
properly.
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1797772/+subscriptions
--
Mailing list: https://launchpad.net/~kernel-packages
Post to : kernel-packages@lists.launchpad.net
Unsubscribe : https://launchpad.net/~kernel-packages
More help : https://help.launchpad.net/ListHelp
