hollalinux
/
linux-sg2042
mirror of https://github.com/sophgo/linux-riscv.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity
linux-sg2042/drivers
History
Hans de Goede bd8ba20597 ACPI / video: Filter the _BCL table for duplicate brightness values 
Some devices have duplicate entries in there brightness levels table, ie
on my Dell Latitude E6430 the table looks like this:

[    3.686060] acpi backlight index   0, val 80
[    3.686095] acpi backlight index   1, val 50
[    3.686122] acpi backlight index   2, val 5
[    3.686147] acpi backlight index   3, val 5
[    3.686172] acpi backlight index   4, val 5
[    3.686197] acpi backlight index   5, val 5
[    3.686223] acpi backlight index   6, val 5
[    3.686248] acpi backlight index   7, val 5
[    3.686273] acpi backlight index   8, val 6
[    3.686332] acpi backlight index   9, val 7
[    3.686356] acpi backlight index  10, val 8
[    3.686380] acpi backlight index  11, val 9
etc.

Notice that brightness values 0-5 are all mapped to 5. This means that
if userspace writes any value between 0 and 5 to the brightness sysfs attribute
and then reads it, it will always return 0, which is somewhat unexpected.

This is a problem for ie gnome-settings-daemon, which uses read-modify-write
logic when the users presses the brightness up or down keys. This is done
this way to take brightness changes from other sources into account.

On this specific laptop what happens once the brightness has been set to 0,
is that gsd reads 0, adds 5, writes 5, and on the next brightness up key press
again reads 0, so things get stuck at the lowest brightness setting.

Filtering out the duplicate table entries, makes any write to brightness
read back as the written value as one would expect, fixing this.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Aaron Lu <aaron.lu@intel.com>
Cc: All applicable <stable@vger.kernel.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
 		2014-02-20 01:33:40 +01:00
..
accessibility
…
acpi ACPI / video: Filter the _BCL table for duplicate brightness values 2014-02-20 01:33:40 +01:00
amba
…
ata ata: sata_mv: Fix probe failures with optional phys 2014-02-05 05:48:58 +00:00
atm
…
auxdisplay
…
base drivers/base: fix devres handling for master device 2014-02-07 16:45:14 -08:00
bcma Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus 2014-01-30 17:20:32 -08:00
block Merge branch 'for-linus' of git://git.kernel.dk/linux-block 2014-02-14 10:45:18 -08:00
bluetooth
…
bus drivers: bus: fix CCI driver kcalloc call parameters swap 2014-01-31 15:15:13 -08:00
cdrom Merge branch 'for-3.14/drivers' of git://git.kernel.dk/linux-block 2014-01-30 11:40:10 -08:00
char Char/Misc fixes for 3.14-rc3 2014-02-14 16:13:00 -08:00
clk The second half of the clock framework pull requeust for 3.14 is 2014-01-28 18:44:53 -08:00
clocksource clocksource: Kona: Print warning rather than panic 2014-02-06 16:01:40 +01:00
connector
…
cpufreq intel_pstate: Remove energy reporting from pstate_sample tracepoint 2014-02-13 02:11:18 +01:00
cpuidle powerpc/powernv/cpuidle: Back-end cpuidle driver for powernv platform. 2014-01-29 17:02:24 +11:00
crypto crypto/nx/nx-842: Fix handling of vmalloc addresses 2014-02-11 11:24:49 +11:00
dca
…
devfreq Merge branches 'pm-cpufreq' and 'pm-devfreq' 2014-01-29 11:48:23 +01:00
dio
…
dma dma: mv_xor: Silence a bunch of LPAE-related warnings 2014-02-12 16:21:17 -08:00
edac EDAC: Correct workqueue setup path 2014-02-14 10:40:47 +01:00
eisa Revert "EISA: Initialize device before its resources" 2014-01-17 14:57:29 -07:00
extcon
…
firewire firewire: Enable remote DMA above 4 GB 2014-01-20 01:11:13 +01:00
firmware firmware/google: drop 'select EFI' to avoid recursive dependency 2014-01-27 21:02:40 -08:00
fmc
…
gpio gpio: tb10x: GPIO_TB10X needs to select GENERIC_IRQ_CHIP 2014-02-05 11:13:59 +01:00
gpu Merge branch 'tda998x-fixes' of git://ftp.arm.linux.org.uk/~rmk/linux-cubox into drm-next 2014-02-12 09:51:51 +10:00
hid Merge branch 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media 2014-01-31 09:31:14 -08:00
hsi
…
hv Drivers: hv: vmbus: Don't timeout during the initial connection with host 2014-02-07 08:27:34 -08:00
hwmon hwmon: (ntc_thermistor) Avoid math overflow 2014-02-13 19:43:52 -08:00
hwspinlock
…
i2c i2c: mv64xxx: refactor message start to ensure proper initialization 2014-02-15 15:42:31 +01:00
ide drivers: ide: Include appropriate header file in ide-pio-blacklist.c 2014-01-28 23:35:09 -08:00
idle ACPI and power management updates for 3.14-rc1 2014-01-24 15:51:02 -08:00
iio iio: max1363: Use devm_regulator_get_optional for optional regulator 2014-02-08 11:46:00 +00:00
infiniband Merge git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending 2014-02-15 16:18:47 -08:00
input Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input 2014-01-24 17:17:30 -08:00
iommu IOMMU Updates for Linux v3.14 2014-01-29 20:00:13 -08:00
ipack
…
irqchip Merge branch 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2014-02-05 16:02:53 -08:00
isdn isdn/hisax: hex vs decimal typo in prfeatureind() 2014-02-06 21:18:06 -08:00
leds Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/cooloney/linux-leds 2014-01-28 18:53:01 -08:00
lguest
…
macintosh Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc 2014-01-27 21:11:26 -08:00
mailbox drivers/mailbox/omap: make mbox->irq signed for error handling 2014-01-23 16:36:53 -08:00
md Two bugfixes for md 2014-02-14 12:48:16 -08:00
media [media] adv7842: Composite free-run platfrom-data fix 2014-02-04 06:46:10 -02:00
memory
…
memstick drivers/memstick/host/rtsx_pci_ms.c: fix ms card data transfer bug 2014-01-23 16:37:04 -08:00
message drivers/message/i2o/i2o_config.c: fix deadlock in compat_ioctl(I2OGETIOPS) 2014-02-10 16:01:40 -08:00
mfd regulator: Updates for v3.14 2014-01-25 13:19:10 -08:00
misc Char/Misc fixes for 3.14-rc3 2014-02-14 16:13:00 -08:00
mmc MMC highlights for 3.14: 2014-01-26 11:00:41 -08:00
mtd * Improve the NOR erasure quirk - now it tries to do as little writes as 2014-01-30 20:04:09 -08:00
net RDMA/InfiniBand fixes for 3.14-rc3: 2014-02-14 10:33:45 -08:00
nfc
…
ntb
…
nubus
…
of of: search the best compatible match first in __of_match_node() 2014-02-15 18:51:17 -06:00
oprofile
…
parisc
…
parport TTY/Serial driver patches for 3.14-rc1 2014-01-20 16:05:23 -08:00
pci ACPI / hotplug / PCI: Relax the checking of _STA return values 2014-02-12 12:45:57 +01:00
pcmcia PCI changes for the v3.14 merge window: 2014-01-22 16:39:28 -08:00
phy drivers: phy: Add support for optional phys 2014-02-05 05:48:43 +00:00
pinctrl pinctrl: tegra: return correct error type 2014-02-06 14:21:19 +01:00
platform platform/chrome: Cleanups and improvements 2014-01-29 20:06:01 -08:00
pnp
…
power Few fixes: 2014-02-14 10:32:28 -08:00
powercap
…
pps
…
ps3
…
ptp ptp_pch: Add dependency on HAS_IOMEM 2014-01-15 14:51:22 -08:00
pwm pwm: Changes for v3.14-rc1 2014-01-27 08:15:51 -08:00
rapidio
…
regulator Merge remote-tracking branches 'regulator/fix/da9055' and 'regulator/fix/max14577' into regulator-linus 2014-02-12 11:47:33 +00:00
remoteproc
…
reset
…
rpmsg
…
rtc Merge branch 'akpm' (incoming from Andrew) 2014-01-23 19:11:50 -08:00
s390 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux 2014-02-11 12:23:50 -08:00
sbus sparc: delete non-required instances of include <linux/init.h> 2014-01-28 23:38:23 -08:00
scsi qla2xxx: Remove last vestiges of qla_tgt_cmd.cmd_list 2014-02-12 15:11:03 -08:00
sfi
…
sh
…
sn
…
spi Merge remote-tracking branches 'spi/fix/doc', 'spi/fix/nuc900' and 'spi/fix/rspi' into spi-linus 2014-02-11 12:08:27 +00:00
ssb Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus 2014-01-30 17:20:32 -08:00
staging Staging driver fixes for 3.14-rc3 2014-02-14 16:14:11 -08:00
target Target/sbc: Fix protection copy routine 2014-02-12 15:14:45 -08:00
tc
…
thermal Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/rzhang/linux 2014-01-24 17:13:49 -08:00
tty vt: Fix secure clear screen 2014-02-13 11:12:00 -08:00
uio
…
usb usb: option: blacklist ZTE MF667 net interface 2014-02-11 15:33:54 -08:00
uwb
…
vfio Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc 2014-01-27 21:11:26 -08:00
vhost Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending 2014-01-31 15:31:23 -08:00
video video: Kconfig: Allow more broad selection of the imxfb framebuffer driver. 2014-02-14 10:44:52 +02:00
virt
…
virtio A few simple fixes. Quiet cycle. 2014-01-22 22:24:35 -08:00
vlynq drivers/vlynq/vlynq.c: fix another resource size off by 1 error 2014-01-23 16:36:55 -08:00
vme VME: Correct read/write alignment algorithm 2014-02-07 08:16:14 -08:00
w1 drivers/w1/masters/w1-gpio.c: add strong pullup emulation 2014-01-23 16:37:04 -08:00
watchdog watchdog: dw_wdt: Add dependency on HAS_IOMEM 2014-02-08 09:47:11 +01:00
xen Bug-fix: 2014-02-12 12:28:05 -08:00
zorro
…
Kconfig
…
Makefile
…