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Old 09-23-2012, 12:52 PM   #1
Begemot
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Question How to write to Kindle DX eink screen from console?
How would one write to eink screen from console?

I would like to test if the screen is completely broken, at least I would like to try something like erasing the default screen which has stayed "the boy under the tree with low battery warning" ever since I received the unit from the eBay seller.

I am connected via serial console to DXG (demo) as root.

Code:
[root@kindle /dev]# ls -l /dev
lrwxrwxrwx    1 root     root           13 Jan  2 14:17 MAKEDEV -> /sbin/MAKEDEV
drwxr-xr-x    3 root     root           60 Jan  2 19:18 bus
crw-rw----    1 root     root       5,   1 Jan  2 19:18 console
lrwxrwxrwx    1 root     root           11 Jan  2 14:17 core -> /proc/kcore
drwxr-xr-x    2 root     root           60 Jan  2 14:17 fb
lrwxrwxrwx    1 root     root            4 Jan  2 14:17 fb0 -> fb/0
lrwxrwxrwx    1 root     root           13 Jan  2 14:17 fd -> /proc/self/fd
crw-rw----    1 root     root       1,   7 Jan  2 14:17 full
crw-rw----    1 root     root      10, 229 Jan  2 14:17 fuse
drwxr-xr-x    2 root     root           60 Jan  2 14:17 i2c
prw-------    1 root     root            0 Jan  2 19:17 initctl
drwxr-xr-x    2 root     root          100 Jan  2 19:17 input
crw-rw----    1 root     root       1,   2 Jan  2 14:17 kmem
crw-rw----    1 root     root       1,  11 Jan  2 14:17 kmsg
srw-rw-rw-    1 root     root            0 Jan  2 22:45 log
drwxr-xr-x    2 root     root          200 Jan  2 14:17 loop
crw-rw----    1 root     root      10, 158 Jan  2 14:17 mariobutton
crw-rw----    1 root     root       1,   1 Jan  2 14:17 mem
drwxr-xr-x    2 root     root           60 Jan  2 14:17 misc
crw-rw----    1 root     root      10,  62 Jan  2 19:17 mma7660F
brw-rw----    1 root     root     179,   0 Jan  2 14:17 mmcblk0
brw-rw----    1 root     root     179,   1 Jan  2 14:17 mmcblk0p1
brw-rw----    1 root     root     179,   2 Jan  2 14:17 mmcblk0p2
brw-rw----    1 root     root     179,   3 Jan  2 14:17 mmcblk0p3
brw-rw----    1 root     root     179,   4 Jan  2 20:41 mmcblk0p4
drwxr-xr-x    2 root     root          400 Jan  2 14:17 mtd
drwxr-xr-x    2 root     root          220 Jan  2 14:17 mtdblock
crw-rw----    1 root     root     247,   0 Jan  2 14:17 mwan
crw-rw----    1 root     root     253,   0 Jan  2 14:17 mxc_ipu
drwxr-xr-x    2 root     root           60 Jan  2 14:17 net
crw-rw----    1 root     root       1,   3 Jan  2 14:17 null
crw-rw----    1 root     root     250,   0 Jan  2 14:17 pmic
crw-rw----    1 root     root     249,   0 Jan  2 14:17 pmic_adc
crw-rw----    1 root     root     248,   0 Jan  2 14:17 pmic_battery
crw-rw----    1 root     root     251,   0 Jan  2 14:17 pmic_light
crw-rw----    1 root     root     252,   0 Jan  2 14:17 pmic_rtc
crw-rw----    1 root     root       1,   4 Jan  2 14:17 port
crw-------    1 root     root     108,   0 Jan  2 14:17 ppp
crw-rw----    1 root     root       5,   2 Jan  2 14:17 ptmx
drwxr-xr-x    2 root     root            0 Jan  2 14:17 pts
crw-rw----    1 root     root       1,   8 Jan  2 14:17 random
crw-rw----    1 root     root     254,   0 Jan  2 14:17 rtc0
drwxrwxrwt    2 root     root           40 Jan  2 14:17 shm
drwxr-xr-x    2 root     root          140 Jan  2 19:17 snd
lrwxrwxrwx    1 root     root           24 Jan  2 14:17 sndstat -> /proc/asound/oss/sndstat
lrwxrwxrwx    1 root     root           15 Jan  2 14:17 stderr -> /proc/self/fd/2
lrwxrwxrwx    1 root     root           15 Jan  2 14:17 stdin -> /proc/self/fd/0
lrwxrwxrwx    1 root     root           15 Jan  2 14:17 stdout -> /proc/self/fd/1
lrwxrwxrwx    1 root     root            8 Jan  2 14:17 ts -> pmic_adc
crw-rw----    1 root     root       5,   0 Jan  2 22:31 tty
drwxr-xr-x    2 root     root          120 Jan  2 14:17 ttymxc
lrwxrwxrwx    1 root     root            8 Jan  2 14:17 ttymxc0 -> ttymxc/0
lrwxrwxrwx    1 root     root            8 Jan  2 14:17 ttymxc1 -> ttymxc/1
lrwxrwxrwx    1 root     root            8 Jan  2 14:17 ttymxc2 -> ttymxc/2
-rw-r--r--    1 root     root            6 Jan  2 22:26 ttymxc3
lrwxrwxrwx    1 root     root            8 Jan  2 14:17 ttymxc4 -> ttymxc/4
crw-rw----    1 root     root       1,   9 Jan  2 14:17 urandom
crw-rw----    1 root     root     189,   0 Jan  2 19:18 usb1
crw-rw----    1 root     root     246,   0 Jan  2 19:18 usbdev1.1_ep00
crw-rw----    1 root     root     246,   1 Jan  2 19:18 usbdev1.1_ep81
crw-rw----    1 root     root       1,   5 Jan  2 14:17 zero

[root@kindle /dev]# echo "hello" > ttymxc0
hello
[root@kindle /dev]# echo "hello" > ttymxc1
[root@kindle /dev]# echo "hello" > ttymxc2
mxc-gpio: invalid GPIO 224
mxc-gpio: invalid GPIO 224
mxc-gpio: invalid GPIO 224
mxc-gpio: invalid GPIO 224
mxc-gpio: invalid GPIO 224
mxc-gpio: invalid GPIO 224
mxc-gpio: invalid GPIO 224
mxc-gpio: invalid GPIO 224
[root@kindle /dev]# echo "hello" > ttymxc4
[root@kindle /dev]#
So ttymxc0 goes to the serial console as I can see the "hello" then, otherwise, I have no idea on how to write to eink.

Any pointers would be much appreciated.
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Old 09-23-2012, 12:58 PM   #2
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Code:
eips -c
will clear the screen on a K3, but I'm not sure if the DX has eips.
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Old 09-23-2012, 01:11 PM   #3
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Thanks! Turns out DX does have eips

Sadly .eips -c bring no change on screen

It looks like the screen is completely broken, about the last thing that I can think of is opening it up completely and flexing it and checking every connection.


Also, it appears that the screensaver/demo software is running with no problems (written in Java no less, since I saw a Java process running).
Code:
[root@kindle root]# cat /var/log/messages
700102:231447 syslog-ng[647]: new configuration initialized
700102:231447 cvm[2359]: I KioskBooklet:KioskAlivenessInfo:dsn=B009A101040311F8,batteryPercent=100,loops                           =1,version=Mediatron (546400004):com.amazon.ebook.framework.impl.booklet.screensaver.i just rendered Kio                           sk image #1; Image flipper Thread Name: ThreadPoolImpl-Processor: FlippingThroughImages-188072548
700102:231448 cvm[2359]: E ScreenSaverBooklet:Error::.getUserScreenSaverImage SSL = null or len = 0.  Re                           turning NULL
700102:231448 cvm[2359]: I ScreenSaverBooklet:Information::getScreenSaverImage() called
700102:231448 cvm[2359]: I ScreenSaverBooklet:Information::getScreenSaverImage() KEY is  824x1200
700102:231448 cvm[2359]: I ScreenSaverBooklet:Information::.getScreenSaverImage loading file = /opt/amaz                           on/ebook/img/kiosk_images/0030-v2_p.gif
700102:231449 wand[1655]: I dtp:diag: t=2deb9,MCC MNC=247 05,Channel=10663,Band=WCDMA I IMT 2000,C1=3943                           8438,L1=161,R1=1,Network Time=0000/00/00 00.00.00,Local Time Offset=Not provided,Selection Mode=Automati                           c,Test Mode=0,Bars=---,Roaming=1,RSSI=-113,Tx Power=0,System Mode=WCDMA,Data Service Mode=Unknown,Servic                           e Status=Limited service,Reg Status=None,Call Status=Idle,MM Attach State=Not available,MM LU State=Not                            available,GMM Attach State=Not available,GMM State=Deregistered,GMM RAU State=Not available,PDP State=In                           active,Network Mode=CS PS separate attach mode,PMM Mode=Detached,SIM Status=Valid; PIN okay; R3,MM Attac                           h Error=Not available,MM LU Error=Not available,GMM Attach Error=Not available,GMM RAU Error=Not availab                           le,PDP Rej Reason=No error,Active/Monitored Sets=,RSCP=-247,DRX=64,HSDPA Status=Inactive,HSDPA Indicatio                           n=HSDPA supp,N1=,B1=,Pathloss=,MFRM=,EGPRS Indication=,HPLMN=UMTS;310;410 GSM;310;410,RPLMN=310;410,FPLM                           N=,n=1:
700102:231450 wand[1655]: I lipc:evts:name=serviceStateChanged, origin=com.lab126.wan, fparam=2048:Event                            sent
700102:231450 cvm[2359]: I LipcService:EventArrived:source=com.lab126.wan,name=serviceStateChanged,arg0=                           2048:
700102:231450 cvm[2359]: I WANManager:WANServiceInfo:signal=0,service=0,roaming=8:
700102:231459 cvm[2359]: I KioskBooklet:KioskAlivenessInfo:dsn=B009A101040311F8,batteryPercent=100,loops                           =1,version=Mediatron (546400004):com.amazon.ebook.framework.impl.booklet.screensaver.i just rendered Kio                           sk image #2; Image flipper Thread Name: ThreadPoolImpl-Processor: FlippingThroughImages-188072548
700102:231500 cvm[2359]: E ScreenSaverBooklet:Error::.getUserScreenSaverImage SSL = null or len = 0.  Re                           turning NULL
700102:231500 cvm[2359]: I ScreenSaverBooklet:Information::getScreenSaverImage() called
700102:231500 cvm[2359]: I ScreenSaverBooklet:Information::getScreenSaverImage() KEY is  824x1200
700102:231500 cvm[2359]: I ScreenSaverBooklet:Information::.getScreenSaverImage loading file = /opt/amaz                           on/ebook/img/kiosk_images/0040-v2_p.gif
700102:231501 crond[2084]: USER root pid 2758 cmd /usr/sbin/checkpmond
700102:231503 crond[2084]: USER root pid 2759 cmd /usr/sbin/tinyrot
700102:231503 crond[2084]: USER root pid 2761 cmd /usr/sbin/loginfo powerdcheck
700102:231503 system: W tinyrot:def::Still booting - not doing anything until later
700102:231510 cvm[2359]: I KioskBooklet:KioskAlivenessInfo:dsn=B009A101040311F8,batteryPercent=100,loops                           =1,version=Mediatron (546400004):com.amazon.ebook.framework.impl.booklet.screensaver.i just rendered Kio                           sk image #3; Image flipper Thread Name: ThreadPoolImpl-Processor: FlippingThroughImages-188072548
700102:231511 cvm[2359]: E ScreenSaverBooklet:Error::.getUserScreenSaverImage SSL = null or len = 0.  Re                           turning NULL
700102:231511 cvm[2359]: I ScreenSaverBooklet:Information::getScreenSaverImage() called
700102:231511 cvm[2359]: I ScreenSaverBooklet:Information::getScreenSaverImage() KEY is  824x1200
700102:231511 cvm[2359]: I ScreenSaverBooklet:Information::.getScreenSaverImage loading file = /opt/amaz                           on/ebook/img/kiosk_images/0050-v2_p.gif
700102:231522 cvm[2359]: I KioskBooklet:KioskAlivenessInfo:dsn=B009A101040311F8,batteryPercent=100,loops                           =1,version=Mediatron (546400004):com.amazon.ebook.framework.impl.booklet.screensaver.i just rendered Kio                           sk image #4; Image flipper Thread Name: ThreadPoolImpl-Processor: FlippingThroughImages-188072548
700102:231523 cvm[2359]: E ScreenSaverBooklet:Error::.getUserScreenSaverImage SSL = null or len = 0.  Re                           turning NULL
700102:231523 cvm[2359]: I ScreenSaverBooklet:Information::getScreenSaverImage() called
700102:231523 cvm[2359]: I ScreenSaverBooklet:Information::getScreenSaverImage() KEY is  824x1200
700102:231523 cvm[2359]: I ScreenSaverBooklet:Information::.getScreenSaverImage loading file = /opt/amaz                           on/ebook/img/kiosk_images/0060-v2_p.gif
[root@kindle root]# cat /var/log/messages
700102:231447 syslog-ng[647]: new configuration initialized
700102:231447 cvm[2359]: I KioskBooklet:KioskAlivenessInfo:dsn=B009A101040311F8,batteryPercent=100,loops=1,version=Mediatron (546400004):com.amazon.ebook.framework.impl.booklet.screensaver.i just rendered Kiosk image #1; Image flipper Thread Name: ThreadPoolImpl-Processor: FlippingThroughImages-188072548
700102:231448 cvm[2359]: E ScreenSaverBooklet:Error::.getUserScreenSaverImage SSL = null or len = 0.  Returning NULL
700102:231448 cvm[2359]: I ScreenSaverBooklet:Information::getScreenSaverImage() called
700102:231448 cvm[2359]: I ScreenSaverBooklet:Information::getScreenSaverImage() KEY is  824x1200
700102:231448 cvm[2359]: I ScreenSaverBooklet:Information::.getScreenSaverImage loading file = /opt/amazon/ebook/img/kiosk_images/0030-v2_p.gif
700102:231449 wand[1655]: I dtp:diag: t=2deb9,MCC MNC=247 05,Channel=10663,Band=WCDMA I IMT 2000,C1=39438438,L1=161,R1=1,Network Time=0000/00/00 00.00.00,Local Time Offset=Not provided,Selection Mode=Automatic,Test Mode=0,Bars=---,Roaming=1,RSSI=-113,Tx Power=0,System Mode=WCDMA,Data Service Mode=Unknown,Service Status=Limited service,Reg Status=None,Call Status=Idle,MM Attach State=Not available,MM LU State=Not available,GMM Attach State=Not available,GMM State=Deregistered,GMM RAU State=Not available,PDP State=Inactive,Network Mode=CS PS separate attach mode,PMM Mode=Detached,SIM Status=Valid; PIN okay; R3,MM Attach Error=Not available,MM LU Error=Not available,GMM Attach Error=Not available,GMM RAU Error=Not available,PDP Rej Reason=No error,Active/Monitored Sets=,RSCP=-247,DRX=64,HSDPA Status=Inactive,HSDPA Indication=HSDPA supp,N1=,B1=,Pathloss=,MFRM=,EGPRS Indication=,HPLMN=UMTS;310;410 GSM;310;410,RPLMN=310;410,FPLMN=,n=1:
700102:231450 wand[1655]: I lipc:evts:name=serviceStateChanged, origin=com.lab126.wan, fparam=2048:Event sent
700102:231450 cvm[2359]: I LipcService:EventArrived:source=com.lab126.wan,name=serviceStateChanged,arg0=2048:
700102:231450 cvm[2359]: I WANManager:WANServiceInfo:signal=0,service=0,roaming=8:
700102:231459 cvm[2359]: I KioskBooklet:KioskAlivenessInfo:dsn=B009A101040311F8,batteryPercent=100,loops=1,version=Mediatron (546400004):com.amazon.ebook.framework.impl.booklet.screensaver.i just rendered Kiosk image #2; Image flipper Thread Name: ThreadPoolImpl-Processor: FlippingThroughImages-188072548
700102:231500 cvm[2359]: E ScreenSaverBooklet:Error::.getUserScreenSaverImage SSL = null or len = 0.  Returning NULL
700102:231500 cvm[2359]: I ScreenSaverBooklet:Information::getScreenSaverImage() called
700102:231500 cvm[2359]: I ScreenSaverBooklet:Information::getScreenSaverImage() KEY is  824x1200
700102:231500 cvm[2359]: I ScreenSaverBooklet:Information::.getScreenSaverImage loading file = /opt/amazon/ebook/img/kiosk_images/0040-v2_p.gif
700102:231501 crond[2084]: USER root pid 2758 cmd /usr/sbin/checkpmond
700102:231503 crond[2084]: USER root pid 2759 cmd /usr/sbin/tinyrot
700102:231503 crond[2084]: USER root pid 2761 cmd /usr/sbin/loginfo powerdcheck
700102:231503 system: W tinyrot:def::Still booting - not doing anything until later
700102:231510 cvm[2359]: I KioskBooklet:KioskAlivenessInfo:dsn=B009A101040311F8,batteryPercent=100,loops=1,version=Mediatron (546400004):com.amazon.ebook.framework.impl.booklet.screensaver.i just rendered Kiosk image #3; Image flipper Thread Name: ThreadPoolImpl-Processor: FlippingThroughImages-188072548
700102:231511 cvm[2359]: E ScreenSaverBooklet:Error::.getUserScreenSaverImage SSL = null or len = 0.  Returning NULL
700102:231511 cvm[2359]: I ScreenSaverBooklet:Information::getScreenSaverImage() called
700102:231511 cvm[2359]: I ScreenSaverBooklet:Information::getScreenSaverImage() KEY is  824x1200
700102:231511 cvm[2359]: I ScreenSaverBooklet:Information::.getScreenSaverImage loading file = /opt/amazon/ebook/img/kiosk_images/0050-v2_p.gif
700102:231522 cvm[2359]: I KioskBooklet:KioskAlivenessInfo:dsn=B009A101040311F8,batteryPercent=100,loops=1,version=Mediatron (546400004):com.amazon.ebook.framework.impl.booklet.screensaver.i just rendered Kiosk image #4; Image flipper Thread Name: ThreadPoolImpl-Processor: FlippingThroughImages-188072548
700102:231523 cvm[2359]: E ScreenSaverBooklet:Error::.getUserScreenSaverImage SSL = null or len = 0.  Returning NULL
700102:231523 cvm[2359]: I ScreenSaverBooklet:Information::getScreenSaverImage() called
700102:231523 cvm[2359]: I ScreenSaverBooklet:Information::getScreenSaverImage() KEY is  824x1200
700102:231523 cvm[2359]: I ScreenSaverBooklet:Information::.getScreenSaverImage loading file = /opt/amazon/ebook/img/kiosk_images/0060-v2_p.gif
700102:231533 cvm[2359]: I KioskBooklet:KioskAlivenessInfo:dsn=B009A101040311F8,batteryPercent=100,loops=1,version=Mediatron (546400004):com.amazon.ebook.framework.impl.booklet.screensaver.i just rendered Kiosk image #5; Image flipper Thread Name: ThreadPoolImpl-Processor: FlippingThroughImages-188072548
700102:231534 cvm[2359]: E ScreenSaverBooklet:Error::.getUserScreenSaverImage SSL = null or len = 0.  Returning NULL
700102:231534 cvm[2359]: I ScreenSaverBooklet:Information::getScreenSaverImage() called
700102:231534 cvm[2359]: I ScreenSaverBooklet:Information::getScreenSaverImage() KEY is  824x1200
700102:231534 cvm[2359]: I ScreenSaverBooklet:Information::.getScreenSaverImage loading file = /opt/amazon/ebook/img/kiosk_images/0070-v2_p.gif
700102:231542 cvm[2359]: I LipcService:EventArrived:source=com.lab126.wan,name=nonfatalFailure,arg0=-10:
700102:231542 wand[1655]: I def:nosig:signal=-1:ppp not started because there was no signal
700102:231542 wand[1655]: I lipc:evts:name=nonfatalFailure, origin=com.lab126.wan, fparam=-10:Event sent
700102:231542 cvm[2359]: I LipcService:EventArrived:source=com.lab126.wan,name=powerStateChanged,arg0=5:
700102:231542 wand[1655]: I lipc:evts:name=powerStateChanged, origin=com.lab126.wan, fparam=5:Event sent
700102:231542 wand[1655]: I def:wpstate:state=powerStateGoingToSleep:wan power state changed
700102:231542 system: I wancontrol:pc:processing "devicesleep"
700102:231542 cvm[2359]: I LipcService:EventArrived:source=com.lab126.wan,name=powerStateChanged,arg0=2:
700102:231542 wand[1655]: I lipc:evts:name=powerStateChanged, origin=com.lab126.wan, fparam=2:Event sent
700102:231542 wand[1655]: I def:wpstate:state=powerStateAsleep:wan power state changed
700102:231544 cvm[2359]: I KioskBooklet:KioskAlivenessInfo:dsn=B009A101040311F8,batteryPercent=100,loops=1,version=Mediatron (546400004):com.amazon.ebook.framework.impl.booklet.screensaver.i just rendered Kiosk image #6; Image flipper Thread Name: ThreadPoolImpl-Processor: FlippingThroughImages-188072548
700102:231545 cvm[2359]: E ScreenSaverBooklet:Error::.getUserScreenSaverImage SSL = null or len = 0.  Returning NULL
700102:231545 cvm[2359]: I ScreenSaverBooklet:Information::getScreenSaverImage() called
700102:231545 cvm[2359]: I ScreenSaverBooklet:Information::getScreenSaverImage() KEY is  824x1200
700102:231545 cvm[2359]: I ScreenSaverBooklet:Information::.getScreenSaverImage loading file = /opt/amazon/ebook/img/kiosk_images/0080-v2_p.gif
700102:231556 cvm[2359]: I KioskBooklet:KioskAlivenessInfo:dsn=B009A101040311F8,batteryPercent=100,loops=1,version=Mediatron (546400004):com.amazon.ebook.framework.impl.booklet.screensaver.i just rendered Kiosk image #7; Image flipper Thread Name: ThreadPoolImpl-Processor: FlippingThroughImages-188072548
700102:231557 cvm[2359]: E ScreenSaverBooklet:Error::.getUserScreenSaverImage SSL = null or len = 0.  Returning NULL
700102:231557 cvm[2359]: I ScreenSaverBooklet:Information::getScreenSaverImage() called
700102:231557 cvm[2359]: I ScreenSaverBooklet:Information::getScreenSaverImage() KEY is  824x1200
700102:231557 cvm[2359]: I ScreenSaverBooklet:Information::.getScreenSaverImage loading file = /opt/amazon/ebook/img/kiosk_images/0090-v2_p.gif
700102:231607 cvm[2359]: I KioskBooklet:KioskAlivenessInfo:dsn=B009A101040311F8,batteryPercent=100,loops=1,version=Mediatron (546400004):com.amazon.ebook.framework.impl.booklet.screensaver.i just rendered Kiosk image #8; Image flipper Thread Name: ThreadPoolImpl-Processor: FlippingThroughImages-188072548
700102:231608 cvm[2359]: E ScreenSaverBooklet:Error::.getUserScreenSaverImage SSL = null or len = 0.  Returning NULL
700102:231608 cvm[2359]: I ScreenSaverBooklet:Information::getScreenSaverImage() called
700102:231608 cvm[2359]: I ScreenSaverBooklet:Information::getScreenSaverImage() KEY is  824x1200
700102:231608 cvm[2359]: I ScreenSaverBooklet:Information::.getScreenSaverImage loading file = /opt/amazon/ebook/img/kiosk_images/0100-v2_p.gif
700102:231618 cvm[2359]: I KioskBooklet:KioskAlivenessInfo:dsn=B009A101040311F8,batteryPercent=100,loops=1,version=Mediatron (546400004):com.amazon.ebook.framework.impl.booklet.screensaver.i just rendered Kiosk image #9; Image flipper Thread Name: ThreadPoolImpl-Processor: FlippingThroughImages-188072548
700102:231619 cvm[2359]: E ScreenSaverBooklet:Error::.getUserScreenSaverImage SSL = null or len = 0.  Returning NULL
700102:231619 cvm[2359]: I ScreenSaverBooklet:Information::getScreenSaverImage() called
700102:231619 cvm[2359]: I ScreenSaverBooklet:Information::getScreenSaverImage() KEY is  824x1200
700102:231619 cvm[2359]: I ScreenSaverBooklet:Information::.getScreenSaverImage loading file = /opt/amazon/ebook/img/kiosk_images/0110-v2_p.gif
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Old 09-23-2012, 01:12 PM   #4
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There are a lot of uses that a "headless" Linux machine can be put to if the screen is beyond all hope.
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Old 09-23-2012, 06:41 PM   #5
twobob
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screen is toast. would make a nice server.
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Old 09-24-2012, 03:34 AM   #6
dzebrys
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hi,

to test screen you can use following script

/opt/eink/scripts/diags


br/piotr
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