From: Hans de Goede hdegoede@redhat.com
[ Upstream commit 070222731be52d741e55d8967b1764482b81e54c ]
THe HP Stream x360 Convertible PC 11 DSDT has the following VGBS function:
Method (VGBS, 0, Serialized) { If ((^^PCI0.LPCB.EC0.ROLS == Zero)) { VBDS = Zero } Else { VBDS = Zero }
Return (VBDS) /* _SB_.VGBI.VBDS */ }
Which is obviously wrong, because it always returns 0 independent of the 2-in-1 being in laptop or tablet mode. This causes the intel-vbtn driver to initially report SW_TABLET_MODE = 1 to userspace, which is known to cause problems when the 2-in-1 is actually in laptop mode.
During earlier testing this turned out to not be a problem because the 2-in-1 would do a Notify(..., 0xCC) or Notify(..., 0xCD) soon after the intel-vbtn driver loaded, correcting the SW_TABLET_MODE state.
Further testing however has shown that this Notify() soon after the intel-vbtn driver loads, does not always happen. When the Notify does not happen, then intel-vbtn reports SW_TABLET_MODE = 1 resulting in a non-working touchpad.
IOW the tablet-mode reporting is not reliable on this device, so it should be dropped from the allow-list, fixing the touchpad sometimes not working.
Fixes: 8169bd3e6e19 ("platform/x86: intel-vbtn: Switch to an allow-list for SW_TABLET_MODE reporting") Link: https://lore.kernel.org/r/20210114143432.31750-1-hdegoede@redhat.com Signed-off-by: Hans de Goede hdegoede@redhat.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/platform/x86/intel-vbtn.c | 6 ------ 1 file changed, 6 deletions(-)
diff --git a/drivers/platform/x86/intel-vbtn.c b/drivers/platform/x86/intel-vbtn.c index 36d6e72f50735..f5774372c3871 100644 --- a/drivers/platform/x86/intel-vbtn.c +++ b/drivers/platform/x86/intel-vbtn.c @@ -191,12 +191,6 @@ static const struct dmi_system_id dmi_switches_allow_list[] = { DMI_MATCH(DMI_PRODUCT_NAME, "Venue 11 Pro 7130"), }, }, - { - .matches = { - DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), - DMI_MATCH(DMI_PRODUCT_NAME, "HP Stream x360 Convertible PC 11"), - }, - }, { .matches = { DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),