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linux-uconsole/drivers
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Aaron Lu 602b910bb0 ACPI / video: Quirk initial backlight level 0 
commit 2c62333a40 upstream.

Some firmware doesn't initialize initial backlight level to a proper
value and _BQC will return 0 on first time evaluation. We used to be
able to detect such incorrect value with our code logic, as value 0
normally isn't a valid value in _BCL. But with the introduction of Win8,
firmware begins to fill _BCL with values from 0 to 100, now 0 becomes
a valid value but that value will make user's screen black. This patch
test initial _BQC for value 0, if such a value is returned, do not use
it.

References: https://bugzilla.kernel.org/show_bug.cgi?id=64031
References: https://bugzilla.kernel.org/show_bug.cgi?id=61231
References: https://bugzilla.kernel.org/show_bug.cgi?id=63111
Reported-by: Qingshuai Tian <qingshuai.tian@intel.com>
Tested-by: Aaron Lu <aaron.lu@intel.com> # on "Idealpad u330p"
Reported-and-tested-by: <erno@iki.fi> # on "Acer Aspire V5-573G"
Reported-and-tested-by: Kirill Tkhai <tkhai@yandex.ru> # on "HP 250 G1"
Signed-off-by: Aaron Lu <aaron.lu@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-11-29 11:11:43 -08:00
..
accessibility
acpi ACPI / video: Quirk initial backlight level 0 2013-11-29 11:11:43 -08:00
amba
ata libata: make ata_eh_qc_retry() bump scmd->allowed on bogus failures 2013-11-13 12:05:31 +09:00
atm
auxdisplay
base driver core : Fix use after free of dev->parent in device_shutdown 2013-10-05 07:13:11 -07:00
bcma bcma: add more core IDs 2013-05-17 14:31:05 -04:00
block cciss: fix info leak in cciss_ioctl32_passthru() 2013-10-13 16:08:28 -07:00
bluetooth Bluetooth: Add support for BCM20702A0 [0b05, 17cb] 2013-10-13 16:08:32 -07:00
bus
cdrom drivers/cdrom/cdrom.c: use kzalloc() for failing hardware 2013-07-13 11:42:26 -07:00
char random: run random_int_secret_init() run after all late_initcalls 2013-10-18 07:45:44 -07:00
clk clk: fixup argument order when setting VCO parameters 2013-11-13 12:05:33 +09:00
clocksource clocksource: dw_apb: Fix error check 2013-07-25 14:07:29 -07:00
connector connector: use nlmsg_len() to check message length 2013-11-04 04:31:02 -08:00
cpufreq cpufreq / intel_pstate: Fix max_perf_pct on resume 2013-11-13 12:05:30 +09:00
cpuidle cpuidle: coupled: fix race condition between pokes and safe state 2013-09-26 17:18:02 -07:00
crypto crypto: caam - Fixed the memory out of bound overwrite issue 2013-08-04 16:50:57 +08:00
dca
devfreq
dio
dma dmaengine: imx-dma: fix slow path issue in prep_dma_cyclic 2013-10-13 16:08:34 -07:00
edac amd64_edac: Fix single-channel setups 2013-09-26 17:18:28 -07:00
eisa
extcon Removal of GENERIC_GPIO for v3.10 2013-05-09 09:59:16 -07:00
firewire firewire: fix libdc1394/FlyCap2 iso event regression 2013-08-04 16:50:38 +08:00
firmware efivar: fix oops in efivar_update_sysfs_entries() caused by memory reuse 2013-05-13 20:20:02 +01:00
gpio gpio/lynxpoint: check if the interrupt is enabled in IRQ handler 2013-11-04 04:31:06 -08:00
gpu drm/nva3-/disp: fix hda eld writing, needs to be padded 2013-11-29 11:11:41 -08:00
hid HID: uhid: allocate static minor 2013-10-13 16:08:35 -07:00
hsi
hv Drivers: hv: balloon: Do not post pressure status if interrupted 2013-08-04 16:50:58 +08:00
hwmon hwmon: (applesmc) Always read until end of data 2013-10-18 07:45:44 -07:00
hwspinlock
i2c i2c: ismt: initialize DMA buffer 2013-11-04 04:31:06 -08:00
ide
idle sched, idle: Fix the idle polling state logic 2013-11-29 11:11:42 -08:00
iio iio: inkern: fix iio_convert_raw_to_processed_unlocked 2013-07-25 14:07:23 -07:00
infiniband ib_srpt: always set response for task management 2013-10-13 16:08:33 -07:00
input HID: Correct the USB IDs for the new Macbook Air 6 2013-09-26 17:18:15 -07:00
iommu intel-iommu: Fix leaks in pagetable freeing 2013-09-26 17:18:27 -07:00
ipack
irqchip ARM: SoC fixes for 3.10-rc 2013-06-22 09:44:45 -10:00
isdn isdn/kcapi: fix a small underflow 2013-05-20 13:38:14 -07:00
leds leds: wm831x-status: Request a REG resource 2013-09-26 17:18:27 -07:00
lguest
macintosh powerpc/windfarm: Fix noisy slots-fan on Xserve (rm31) 2013-08-11 18:35:20 -07:00
mailbox
md md: Fix skipping recovery for read-only arrays. 2013-11-13 12:05:32 +09:00
media media: sh_vou: almost forever loop in sh_vou_try_fmt_vid_out() 2013-11-20 12:27:48 -08:00
memory drivers/memory: don't check resource with devm_ioremap_resource 2013-05-18 11:55:52 +02:00
memstick
message
mfd mfd: tps6586x: correct device name of the regulator cell 2013-06-24 12:37:47 +01:00
misc misc: atmel_pwm: add deferred-probing support 2013-11-20 12:27:47 -08:00
mmc mmc: tmio_mmc_dma: fix PIO fallback on SDHI 2013-09-26 17:18:29 -07:00
mtd mtd: nand: fix NAND_BUSWIDTH_AUTO for x16 devices 2013-09-26 17:18:29 -07:00
net can: c_can: Fix RX message handling, handle lost message before EOB 2013-11-29 11:11:41 -08:00
nfc NFC: mei: Do not disable MEI devices from their remove routine 2013-05-21 10:48:41 +02:00
ntb NTB: Correct debugfs to work with more than 1 NTB Device 2013-11-13 12:05:35 +09:00
nubus
of of: Fix missing memory initialization on FDT unflattening 2013-09-26 17:18:29 -07:00
oprofile
parisc parisc: Fix interrupt routing for C8000 serial ports 2013-08-11 18:35:21 -07:00
parport parisc: parport0: fix this legacy no-device port driver! 2013-06-01 14:46:42 +02:00
pci PCI: Support PCIe Capability Slot registers only for ports with slots 2013-11-29 11:11:42 -08:00
pcmcia pcmcia: at91_cf: fix gpio_get_value in at91_cf_get_status 2013-07-21 18:21:25 -07:00
pinctrl pinctrl: at91: fix get_pullup/down function return 2013-09-26 17:18:14 -07:00
platform drivers/platform/olpc/olpc-ec.c: initialise earlier 2013-08-29 09:47:38 -07:00
pnp
power charger-manager: Ensure event is not used as format string 2013-07-13 11:42:26 -07:00
pps
ps3
ptp ptp_pch: fix error handling in pch_probe() 2013-05-25 21:24:15 -07:00
pwm drivers/pwm: don't check resource with devm_ioremap_resource 2013-05-18 11:55:58 +02:00
rapidio RAPIDIO: IDT_GEN2: Fix build error. 2013-07-28 16:30:07 -07:00
regulator mfd: tps6586x: correct device name of the regulator cell 2013-06-24 12:37:47 +01:00
remoteproc
reset
rpmsg
rtc drivers/rtc/rtc-max77686.c: Fix wrong register 2013-09-14 06:54:57 -07:00
s390 SCSI: zfcp: fix schedule-inside-lock in scsi_device list loops 2013-08-29 09:47:39 -07:00
sbus
scsi aacraid: prevent invalid pointer dereference 2013-11-29 11:11:40 -08:00
sfi
sh
sn
spi spi: spi-davinci: Fix direction in dma_map_single() 2013-08-11 18:35:25 -07:00
ssb - Lots of cleanups from Artem, including deletion of some obsolete drivers 2013-05-09 10:15:46 -07:00
ssbi
staging staging: wlags49_h2: buffer overflow setting station name 2013-11-13 12:05:33 +09:00
target target/pscsi: fix return value check 2013-11-13 12:05:32 +09:00
tc
thermal drivers/thermal: don't check resource with devm_ioremap_resource 2013-05-18 11:57:30 +02:00
tty serial: vt8500: add missing braces 2013-11-04 04:31:06 -08:00
uio Fix a few incorrectly checked [io_]remap_pfn_range() calls 2013-11-13 12:05:33 +09:00
usb USB: mos7840: fix tiocmget error handling 2013-11-29 11:11:40 -08:00
uwb
vfio vfio: fix crash on rmmod 2013-06-05 08:54:16 -06:00
vhost vhost/scsi: Fix incorrect usage of get_user_pages_fast write parameter 2013-11-13 12:05:32 +09:00
video backlight: atmel-pwm-bl: fix deferred probe from __init 2013-11-20 12:27:47 -08:00
virt
virtio virtio: support unlocked queue poll 2013-07-28 16:29:55 -07:00
vlynq
vme
w1 drivers/w1/masters: don't check resource with devm_ioremap_resource 2013-05-18 11:58:03 +02:00
watchdog watchdog: ts72xx_wdt: locking bug in ioctl 2013-10-18 07:45:45 -07:00
xen xen-gnt: prevent adding duplicate gnt callbacks 2013-09-26 17:18:02 -07:00
zorro
Kconfig
Makefile