Ticket #2345 (new defect)

Opened 9 years ago

Last modified 2 years ago

all pixels are white after xset dpms force off/on

Reported by: lindi Owned by: openmoko-kernel
Priority: normal Milestone:
Component: kernel Version: unspecified
Severity: normal Keywords:
Cc: Blocked By:
Blocking: Estimated Completion (week):
HasPatchForReview: no PatchReviewResult:
Reproducible: always


Steps to reproduce:
1) build linux using
set -x
set -e
rev=$(git log | head -n1|cut -d' ' -f2|cut --bytes=1-32)
rm -fr $buildroot
mkdir $buildroot
cp arch/arm/configs/gta02_defconfig $buildroot/.config
make O=$buildroot ARCH=arm silentoldconfig
CROSS_COMPILE=arm-linux-gnueabi- make -j4 O=$buildroot ARCH=arm CONFIG_DEBUG_SECTION_MISMATCH=y EXTRAVERSION=om-gta02-2.6.32-$rev
arm-linux-gnueabi-objcopy -O binary -R .note -R .comment -S $buildroot/arch/arm/boot/compressed/vmlinux $buildroot/linux.bin
mkimage -A arm -O linux -T kernel -C none -a 30008000 -e 30008000 -n "om-gta02-2.6.32-$rev" -d $buildroot/linux.bin $buildroot/uImage-om-gta02-2.6.32-$rev.bin
mkdir -p $buildroot/staging
make O=$buildroot ARCH=arm modules_install INSTALL_MOD_PATH=staging
cd $buildroot/staging
tar czf ../modules-om-gta02-2.6.32-$rev.tar.gz .
2) boot uImage-om-gta02-2.6.32-a9254be10ac2294ea20165a87c09ea6a.bin
3) start Xorg
4) xset dpms 12 12 12
5) wait 15 seconds
6) xset dpms force on
7) xset dpms force off
8) xset dpms force on

Expected results:
6) display shows useful data
8) display shows useful data

Actual results:
6) all pixels on display appear white
8) all pixels on display appear white

More info:
1) gta02v5

Change History

comment:1 Changed 9 years ago by lindi


om screen power 0
om screen power 1

I see useful data again. om does

int om_screen_power_set(int val)
        int fd, ret;

        fd = open("/dev/fb0", O_RDWR);
        if (fd < 0) return -1;

        ret = ioctl(fd, FBIOBLANK, val ? FB_BLANK_UNBLANK : FB_BLANK_POWERDOWN);
        if (ret != 0) return -2;

        return 0;

comment:2 Changed 9 years ago by lindi

This does not occur with SHR's


so maybe om-gta02-2.6.32 needs some patches from SHR to fix this?

comment:3 Changed 9 years ago by lindi

diff --git a/drivers/video/backlight/jbt6k74.c b/drivers/video/backlight/jbt6k74.c
index 8450904..c7aaf2d 100644
--- a/drivers/video/backlight/jbt6k74.c
+++ b/drivers/video/backlight/jbt6k74.c
@@ -268,6 +268,8 @@ static int jbt_standby_to_sleep(struct jbt_info *jbt)
        gpio_set_value_cansleep(pdata->gpio_reset, 1);
        ret = regulator_bulk_enable(ARRAY_SIZE(jbt->supplies), jbt->supplies);
+        msleep(200);
        /* three times command zero */
        ret |= jbt_reg_write_nodata(jbt, 0x00);

seems to workaround this bug. I got the idea from Thibaut Girka who recommended


comment:4 Changed 9 years ago by lindi

It seems that with this patch the screen is white for 200 ms. This is kind of annoying if you are in a dark environment but this is certainly better than not being able to use the display at all.

comment:5 Changed 2 years ago by Kennescoma

Bentyl Dicyclomine No Doctors Consult <a href=http://cytotec.ccrpdc.com/acheter-cytotec-ligne.php>Acheter Cytotec Ligne</a> Foros Cialis Sin Receta Overnight Lavitra <a href=http://kama1.xyz/kamagra-jelly.php>Kamagra Jelly</a> Dog Cephalexin Clomid Plusieurs <a href=http://viag1.xyz/generic-viagra-pills.php>Generic Viagra Pills</a> Fedex Delivery Cephalexin Amoxicillin For Cats With No Prescription <a href=http://cial1.xyz/buy-cheap-cialis-pills.php>Buy Cheap Cialis Pills</a> Vrikshamla I Overdosed On Keflex <a href=http://cial1.xyz/buy-cialis-online-usa.php>Buy Cialis Online Usa</a> Fluoxetine No Script Needed Amex Accepted Ampicillin For Cheap <a href=http://cial5mg.xyz/generic-cialis-100mg.php>Generic Cialis 100mg</a> Buy Cialis Online Us Pharmacy Buying Cheap Flagyl In Wichita <a href=http://cial1.xyz/cialis-40mg.php>Cialis 40mg</a> Spelling For Medication Keflex Cialis And Ecuador Pharmacy <a href=http://viag1.xyz/cheap-viagra-100mg.php>Cheap Viagra 100mg</a> Levitra Zum Spass Safety Of Buying Viagra On Line <a href=http://zol1.xyz/buy-generic-zoloft-online.php>Buy Generic Zoloft Online</a> Propecia Tablets For Sale Comprar Cialis En Farmacia <a href=http://viag1.xyz/viagra-prices.php>Viagra Prices</a> Comprar Cialis Original Contrareembolso Tadalis Sx Soft Online Bestellen <a href=http://viag1.xyz/cheap-viagra-sales.php>Cheap Viagra Sales</a> Order Prednisone Via Mail Pharmacy Amitriptyline No Perscption <a href=http://cial5mg.xyz/generic-cialis.php>Generic Cialis</a> Viagra Et Avc Viagra Interacciones Medicamentosas <a href=http://kama1.xyz/kamagra-tablet.php>Kamagra Tablet</a> Generic Doryx For Sale Cialis Generico Foro <a href=http://kama1.xyz/buy-kamagra-oral-jelly-online.php>Buy Kamagra Oral Jelly Online</a> Buy Generic Online Viagra Cheap Valtrex Uk <a href=http://cial5mg.xyz/how-to-order-cialis.php>How To Order Cialis</a> Discount Clobetasol No Prescription Needed Saturday Delivery Shop Rxlivehelp <a href=http://cial1.xyz/buy-cheap-cialis-pills.php>Buy Cheap Cialis Pills</a> Osu Levitra En France Prix Cialis Medicament <a href=http://viag1.xyz/viagra-online-usa.php>Viagra Online Usa</a> Zoloft For Sale Elimite Cream Walgreens <a href=http://cial5mg.xyz/cheap-cialis-generic.php>Cheap Cialis Generic</a> Vesicare Achat Amoxicillin Au Rabais Soft <a href=http://zol1.xyz/fast-delivery-zoloft.php>Fast Delivery Zoloft</a> Provera Amoxicillin Suche Viagra Kaufen <a href=http://viag1.xyz/viagra-100mg.php>Viagra 100mg</a> Sildenafil Tablets 100mg Citalopram Without Prescription <a href=http://kama1.xyz/generic-kamagra-pricing.php>Generic Kamagra Pricing</a> Propecia Veneno Sin Amoxicillin Tablets Food Interactions <a href=http://prozac.ccrpdc.com/fluoxetine-online.php>Fluoxetine Online</a> Order Viagra At A Discount Lasix In Usa <a href=http://kama1.xyz/buy-kamagra.php>Buy Kamagra</a> Cheapest Prices On Suhagra 100 Mail Order Fluoxetine Margrilan Medicine Free Shipping Pharmacy <a href=http://zol1.xyz/how-to-buy-zoloft.php>How To Buy Zoloft</a> Celebrex Canadian Pharcharmy Doxycycline Cod Accepted Website <a href=http://cial5mg.xyz/cialis-usa.php>Cialis Usa</a> Oferta De La Propecia Propecia No Prescription <a href=http://kama1.xyz/kamagra-online-fast.php>Kamagra Online Fast</a> Viagra Pillen Wirkung Cialis Controindicazioni <a href=http://cial1.xyz/buy-cialis-online.php>Buy Cialis Online</a> Cialis Sin Receta Espana Kamagra Chewable (Sildenafil) <a href=http://kama1.xyz/low-cost-generic-kamagra.php>Low Cost Generic Kamagra</a> Correos Kamagra Amm Priligy <a href=http://kama1.xyz/kamagra-cheap-online.php>Kamagra Cheap Online</a> Levitra Lloyds Pharmacy El Uso Del Viagra <a href=http://prednisone.ccrpdc.com/buy-deltasone-cheap.php>Buy Deltasone Cheap</a> Clomid Louer Achat Kamagra Au Canada <a href=http://kamagra.ccrpdc.com/kamagra-cheap.php>Kamagra Cheap</a> Viagra Kaufen Wirkung Commande Cialis 20 <a href=http://kama1.xyz/kamagra-soft-tablets.php>Kamagra Soft Tablets</a> Viagra Schweiz Zurich Effetti Cialis <a href=http://zol1.xyz/cheap-zoloft-50mg.php>Cheap Zoloft 50mg</a> Online Viagra Ohne Rezept Priligy Dapoxetina Commenti <a href=http://cial5mg.xyz/cheap-generic-cialis.php>Cheap Generic Cialis</a> Indications Amoxil Sinus Infection Cephalexin Or Clarithromycin <a href=http://prednisone.ccrpdc.com/prednisone-20mg.php>Prednisone 20mg</a> Comprar Cialis Andalucia Zithromax Annostus <a href=http://viag1.xyz/buy-viagra-online.php>Buy Viagra Online</a> Flagyl 400mg Tablets Dosage Detrol Propecia <a href=http://zol1.xyz/generic-zoloft-pricing.php>Generic Zoloft Pricing</a> Original Viagra In Karachi Cytotec Pour Methergin <a href=http://zol1.xyz/zoloft-no-prescription-fast.php>Zoloft No Prescription Fast</a> Vendita Viagra Catania Canadian Drug Store <a href=http://cial5mg.xyz/tadalafil-online.php>Tadalafil Online</a> Generika Cialis Potenzmittel Generic Finasteride Vs Propecia <a href=http://prednisone.ccrpdc.com/online-deltasone-cheap.php>Online Deltasone Cheap</a> Alli Tabs Variety Package With Apcalis <a href=http://kama1.xyz/purchase-cheap-kamagra.php>Purchase Cheap Kamagra</a> Metronidazole 200mg For Dogs Urolosin O Propecia <a href=http://zol1.xyz/shop-zoloft-online.php>Shop Zoloft Online</a> Medrol Dose Pack From Canada Cialis Non Fa Effetto <a href=http://cial5mg.xyz/cialis-40mg.php>Cialis 40mg</a> Clomid Online Progesterone No Doctors Consult Mastercard Accepted Cash Delivery <a href=http://cial1.xyz/need-to-order-cialis.php>Need To Order Cialis</a> Pharmacie En Ligne Levitra

Note: See TracTickets for help on using tickets.