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Indan Zupancic 951f3512db drm/i915: Do not handle backlight combination mode specially ... The current code does not follow Intel documentation: It misses some things and does other, undocumented things. This causes wrong backlight values in certain conditions. Instead of adding tricky code handling badly documented and rare corner cases, don't handle combination mode specially at all. This way PCI_LBPC is never touched and weird things shouldn't happen. If combination mode is enabled, then the only downside is that changing the brightness has a greater granularity (the LBPC value), but LBPC is at most 254 and the maximum is in the thousands, so this is no real functional loss. A potential problem with not handling combined mode is that a brightness of max * PCI_LBPC is not bright enough. However, this is very unlikely because from the documentation LBPC seems to act as a scaling factor and doesn't look like it's supposed to be changed after boot. The value at boot should always result in a bright enough screen. IMPORTANT: However, although usually the above is true, it may not be when people ran an older (2.6.37) kernel which messed up the LBPC register, and they are unlucky enough to have a BIOS that saves and restores the LBPC value. Then a good kernel may seem to not work: Max brightness isn't bright enough. If this happens people should boot back into the old kernel, set brightness to the maximum, and then reboot. After that everything should be fine. For more information see the below links. This fixes bugs: http://bugzilla.kernel.org/show_bug.cgi?id=23472 http://bugzilla.kernel.org/show_bug.cgi?id=25072 Signed-off-by: Indan Zupancic <indan@nul.nu> Tested-by: Alex Riesen <raa.lkml@gmail.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		14 years ago
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accessibility	…
acpi	Merge branch 'iomem' into release	14 years ago
amba	…
ata	libata: set queue DMA alignment to sector size for ATAPI too	14 years ago
atm	ATM, Solos PCI ADSL2+: Don't deref NULL pointer if net_ratelimit() and alloc_skb() interact badly.	14 years ago
auxdisplay	…
base	PM / Runtime: Don't enable interrupts while running in_interrupt	14 years ago
block	nbd: remove module-level ioctl mutex	14 years ago
bluetooth	Bluetooth: add Atheros BT AR9285 fw supported	14 years ago
cdrom	cdrom: support devices that have check_events but not media_changed	14 years ago
char	Revert "tpm_tis: Use timeouts returned from TPM"	14 years ago
clk	…
clocksource	drivers/clocksource/tcb_clksrc.c: fix init sequence	14 years ago
connector	…
cpufreq	…
cpuidle	…
crypto	…
dca	…
dio	…
dma	Merge branch 'imx' into dmaengine-fixes	14 years ago
edac	amd64_edac: Fix DIMMs per DCTs output	14 years ago
eisa	…
firewire	Merge branches 'fixes' and 'fwnet' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394-2.6	14 years ago
firmware	x86, dmi, debug: Log board name (when present) in dmesg/oops output	14 years ago
gpio	drivers/gpio/pca953x.c: add a mutex to fix race condition	14 years ago
gpu	drm/i915: Do not handle backlight combination mode specially	14 years ago
hid	…
hwmon	hwmon: (lm85) extend to support EMC6D103 chips	14 years ago
i2c	…
ide	…
idle	fix a shutdown regression in intel_idle	14 years ago
ieee802154	…
infiniband	Merge branches 'nes' and 'qib' into for-next	14 years ago
input	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input	14 years ago
isdn	isdn: hisax: Use l2headersize() instead of dup (and buggy) func.	14 years ago
leds	leds: leds-pwm: return proper error if pwm_request failed	14 years ago
lguest	…
macintosh	…
mca	…
md	FIX: md: process hangs at wait_barrier after 0->10 takeover	14 years ago
media	Merge branch 'media_fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-2.6	14 years ago
memstick	workqueue, freezer: unify spelling of 'freeze' + 'able' to 'freezable'	14 years ago
message	[SCSI] mptfusion: Bump version 03.04.18	14 years ago
mfd	…
misc	workqueue, freezer: unify spelling of 'freeze' + 'able' to 'freezable'	14 years ago
mmc	ARM: mmci: round down the bytes transferred on error	14 years ago
mtd	workqueue, freezer: unify spelling of 'freeze' + 'able' to 'freezable'	14 years ago
net	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6	14 years ago
nfc	…
nubus	…
of	…
oprofile	…
parisc	…
parport	parport: make lockdep happy with waitlist_lock	14 years ago
pci	pci: use security_capable() when checking capablities during config space read	14 years ago
pcmcia	…
platform	dell-laptop: Toggle the unsupported hardware killswitch	14 years ago
pnp	…
power	…
pps	pps: claim parallel port exclusively	14 years ago
ps3	…
rapidio	rapidio: fix new kernel-doc warnings	14 years ago
regulator	…
rtc	Merge branch 'rtc-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip	14 years ago
s390	[S390] dasd: correct device table	14 years ago
sbus	…
scsi	[SCSI] qla2xxx: Return DID_NO_CONNECT when FC device is lost.	14 years ago
sfi	…
sh	…
sn	…
spi	spi/pxa2xx pci: fix the release - remove race	14 years ago
ssb	Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-2.6	14 years ago
staging	Merge branch 'staging-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging-2.6	14 years ago
target	[SCSI] target: fix use after free detected by SLUB poison	14 years ago
tc	…
telephony	…
thermal	…
tty	Merge branch 'fixes-2.6.38' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq	14 years ago
uio	…
usb	USB: cdc-acm: Adding second ACM channel support for Nokia N8	14 years ago
uwb	…
vhost	vhost: rcu annotation fixup	14 years ago
video	console: rename acquire/release_console_sem() to console_lock/unlock()	14 years ago
virtio	…
vlynq	…
w1	drivers/w1/masters/omap_hdq.c: add missing clk_put	14 years ago
watchdog	m68knommu: Rename m548x_wdt.c to m54xx_wdt.c	14 years ago
xen	xen: suspend and resume system devices when running PVHVM	14 years ago
zorro	…
Kconfig	…
Makefile	…