Would it be possible for you to test the latest upstream kernel? Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest v4.10 kernel[0].
If this bug is fixed in the mainline kernel, please add the following tag 'kernel-fixed-upstream'. If the mainline kernel does not fix this bug, please add the tag: 'kernel-bug-exists-upstream'. Once testing of the upstream kernel is complete, please mark this bug as "Confirmed". Thanks in advance. [0] http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.10-rc7 ** Changed in: linux (Ubuntu) Importance: Undecided => Medium -- 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/1663620 Title: HP_WMI bad report on tablet mode Status in linux package in Ubuntu: Incomplete Bug description: Hi, I'm trying to get the 'SW_TABLET_MODE' event to work correctly on my HP Spectre X360. I think I got most of the peaces of the puzzle, but I need help putting them together. *hp-wmi is suppose to trigger this event, but has some error on startup, here is dmesg: ``` [ 2.711444] input: HP WMI hotkeys as /devices/virtual/input/input14 [ 2.714634] ACPI Error: Field [D128] at 1152 exceeds Buffer [NULL] size 160 (bits) (20160831/dsopcode-236) [ 2.714643] ACPI Error: Method parse/execution failed [\HWMC] (Node ffff8da6c60c1730), AE_AML_BUFFER_LIMIT (20160831/psparse-543) [ 2.714654] ACPI Error: Method parse/execution failed [\_SB.WMID.WMAA] (Node ffff8da6c60c3690), AE_AML_BUFFER_LIMIT (20160831/psparse-543) [ 2.714715] ACPI Error: Field [D128] at 1152 exceeds Buffer [NULL] size 160 (bits) (20160831/dsopcode-236) [ 2.714719] ACPI Error: Method parse/execution failed [\HWMC] (Node ffff8da6c60c1730), AE_AML_BUFFER_LIMIT (20160831/psparse-543) [ 2.714728] ACPI Error: Method parse/execution failed [\_SB.WMID.WMAA] (Node ffff8da6c60c3690), AE_AML_BUFFER_LIMIT (20160831/psparse-543) ``` *I believe that the problem is related to a [known problem](https://wiki.archlinux.org/index.php/HP_Spectre_x360_13-4231ng#Issues), where the airplane mode key is spammed because everytime I open the computer to more than 180* and close it again to normal I get another spam of airplane mode keys *I believe the problem is acpi related. *If I cat the event of INT33D6 ``` cat /dev/input/by-path/platform-INT33D6:00-event ``` I get garbage output `XXXX+X+` when over 180* (tablet state) and when back to normal (laptop state) *I think there is a mixup of INT33D3 and INT33D6, because INT33D3 (or PNP0C60) is suppose to be incharge of laptop mode see here: [https://msdn.microsoft.com/library/windows/hardware/dn457868](https://msdn.microsoft.com/library/windows/hardware/dn457868) [https://patchwork.kernel.org/patch/9306475/](https://patchwork.kernel.org/patch/9306475/) I also decompiled my DSDT, here is the relevant part (I think): ``` Scope (_SB) { Device (VBPA) { Name (_HID, "INT33D6" /* Intel Virtual Buttons Device */) // _HID: Hardware ID Method (_STA, 0, NotSerialized) // _STA: Status { If ((OSYS >= 0x07DD)) { Return (0x0F) } Else { Return (Zero) } } Name (VBST, Zero) Method (VBDL, 0, NotSerialized) { If ((^^PCI0.LPCB.EC0.ECOK == One)) { If ((^^PCI0.LPCB.EC0.CVTS == Zero)) { VBST = 0x40 } Else { VBST = Zero } } } Method (VGBS, 0, NotSerialized) { If ((^^PCI0.LPCB.EC0.ECOK == One)) { If ((^^PCI0.LPCB.EC0.CVTS == Zero)) { VBST = 0x40 } Else { VBST = Zero } } Return (VBST) /* \_SB_.VBPA.VBST */ } } Device (CIND) { Name (_HID, "INT33D3" /* Intel GPIO Buttons */) // _HID: Hardware ID Name (_CID, "PNP0C60" /* Display Sensor Device */) // _CID: Compatible ID Method (_STA, 0, NotSerialized) // _STA: Status { If ((OSYS >= 0x07DD)) { Return (0x0B) } Else { Return (Zero) } } } } ``` *Putting the the computer at tablet state and back at laptop state result in the folllowing messages on dmesg: ``` [ 4320.122389] intel-vbtn INT33D6:00: unknown event index 0xcc [ 4320.171779] atkbd serio0: Unknown key pressed (translated set 2, code 0xd8 on isa0060/serio0). [ 4320.171782] atkbd serio0: Use 'setkeycodes e058 <keycode>' to make it known. [ 4320.179630] atkbd serio0: Unknown key released (translated set 2, code 0xd8 on isa0060/serio0). [ 4320.179631] atkbd serio0: Use 'setkeycodes e058 <keycode>' to make it known. [ 4329.585035] intel-vbtn INT33D6:00: unknown event index 0xcd ``` *I can't read the output of hp-wmi: ``` ls -la /sys/devices/platform/hp-wmi 9:13PM total 0 drwxr-xr-x 3 root root 0 פבר 9 19:20 . drwxr-xr-x 22 root root 0 פבר 9 19:20 .. -rw-r--r-- 1 root root 4096 פבר 9 21:12 als -r--r--r-- 1 root root 4096 פבר 9 21:12 display -r--r--r-- 1 root root 4096 פבר 9 21:12 dock lrwxrwxrwx 1 root root 0 פבר 9 19:20 driver -> ../../../bus/platform/drivers/hp-wmi -rw-r--r-- 1 root root 4096 פבר 9 21:12 driver_override -r--r--r-- 1 root root 4096 פבר 9 21:12 hddtemp -r--r--r-- 1 root root 4096 פבר 9 21:12 modalias -rw-r--r-- 1 root root 4096 פבר 9 21:12 postcode drwxr-xr-x 2 root root 0 פבר 9 21:11 power lrwxrwxrwx 1 root root 0 פבר 9 19:26 subsystem -> ../../../bus/platform -r--r--r-- 1 root root 4096 פבר 9 21:12 tablet -rw-r--r-- 1 root root 4096 פבר 9 21:12 uevent ``` ``` sudo cat /sys/devices/platform/hp-wmi/tablet 9:12PM cat: tablet: Invalid argument ``` After trying to read it I get these messages on dmesg: ``` [12025.122317] ACPI Error: Field [D128] at 1152 exceeds Buffer [NULL] size 160 (bits) (20160831/dsopcode-236) [12025.122323] ACPI Error: Method parse/execution failed [\HWMC] (Node ffff8da6c60c1730), AE_AML_BUFFER_LIMIT (20160831/psparse-543) [12025.122332] ACPI Error: Method parse/execution failed [\_SB.WMID.WMAA] (Node ffff8da6c60c3690), AE_AML_BUFFER_LIMIT (20160831/psparse-543) ``` *xev output is identical when pressing airplane mode key and when switching from laptop to tablet and vise versa: ``` MappingNotify event, serial 35, synthetic NO, window 0x0, request MappingKeyboard, first_keycode 8, count 248 ``` I hope this would help other user too, Thanks in advance, Itay To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1663620/+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
