[lg-l65] Framebuffer does not work
Hello! I port it to lg l65. After boot phone i get only black screen. I try dd if=/dev/urandom of=/dev/fb0 an get this "dd: writing '/dev/fb0': No space left on device 6001+0 records in 6000+0 records out", but screen not change. i try "cat modes > mode", not work. in file /proc/fb this "0 mdssfb_80000" and after boot weston start automatically. weston.log on pastebin.com https://pastebin.com/XXHM5MqG
Activity
Created by: ollieparanoid
I didn't understand what does not work, which one is it? a) Weston does work, splash screens during boot do not work b) Weston and splash screens do not work
Check out the new Troubleshooting:display wiki article (thanks @MartijnBraam for writing it all down!).
If that does not help you: In some cases, it helps to start a working ROM, such as TWRP or Android, and compare the
sysfswith thesysfsfrom postmarketOS. See Tuning sysfs for more information.Make sure that you join the chat, so we can help you more directly. Let us know if you have further issues and thanks for trying out postmarketOS!
By * postmarketOS Bot on 2017-09-20T19:16:47
Edited by Ghost User-
Created by: zhuowei
@zhenyolka The Huawei Y530 and the T2M Flame both use Snapdragon 200 SoCs, and both required similar kernel patches for the screen to work: have you tried applying their kernel patches (https://github.com/postmarketOS/pmbootstrap/tree/master/aports/device/linux-huawei-y530)? Also, make sure KGSL is disabled in the kernel config.
By * postmarketOS Bot on 2017-09-20T20:11:01
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@drebrez dmesg.log https://pastebin.com/qSC1VecB
By zhenyolka on 2017-09-21T08:01:16
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@zhenyolka thanks for the log, it seems your device also uses the mdp3 driver. I suggest trying with this patch or create a your own patch if the line doesn't match (guide)
By Daniele Debernardi on 2017-09-21T08:58:20
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@drebrez with you patch i cant boot postmarket os. its stop on bootloader screen. on pc i cant see phone.
By zhenyolka on 2017-09-22T07:10:13
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I found same interesting. i check brightness of screen with command "cat /sys/devices/i2c.69/i2c-0/0-0039/backlight/qcom,led-flash/actual_brightness" and get output "0". if i try "echo 125 > /sys/devices/i2c.69/i2c-0/0-0039/backlight/qcom,led-flash/brightness" command run success, but if i check actual_brightness file it not change What do?
By zhenyolka on 2017-09-22T10:20:29
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Created by: ollieparanoid
Did you try the sysfs tuning?
By * postmarketOS Bot on 2017-09-23T01:01:24
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@ollieparanoid i try sysfs tuning i solve problem on 50%. Screen is on(on boot i run command "echo 1 > /sys/devices/fd900000.qcom,mdss_mdp/qcom,mdss_fb_primary.134/leds/lcd-backlight/brightness"). Weston start success and postmarketos-demos start success, BUT i see this artifact. screenshot(screenshot not full, my screen is 480x800 screenshot is 350x350, but all screen look like on screenshot): http://images.vfl.ru/ii/1506154563/38db3bd4/18706158_m.png
By zhenyolka on 2017-09-23T08:17:13
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Created by: ollieparanoid
Awesome progress \o/ Screen output messed up will probably fix your problem now.
By * postmarketOS Bot on 2017-09-23T09:28:39
Edited by Ghost User -
@ollieparanoid OK. Problem with artifact solved. Im on finish line to end porting to my device. But i have last 2 not solved problem. 1).Screen in my phone rotated physically upside-down, so all image on my screen rotated on 180 degress. 2).Touchscreen in your os not work. Weston.log in file. Thanks all for postmarketos! weston.log
By zhenyolka on 2017-09-23T15:50:15
Edited by Ghost User -
For touchscreen How select driver for touchscreen in weston. My device not support evdev driver, need select mtev driver, i compile mtev driver, but how select it in weston?
By zhenyolka on 2017-09-23T16:14:58
Edited by Ghost User -
Created by: ollieparanoid
1).Screen in my phone rotated physically upside-down, so all image on my screen rotated on 180 degress.
That is interesting, we have not seen this before. Could you try to fix this with more sysfs tuning?
Regarding 2). touchscreen: You will need an udev rule with the correct device name, as described in Screen Calibration#weston.
I'm happy you made further progress
By * postmarketOS Bot on 2017-09-24T15:17:59
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@ollieparanoid i fully solve problem with black screen outside weston. need add in initfs.hook this lines
echo 0 > /sys/class/graphics/fb0/blank echo 1 > /sys/devices/fd900000.qcom,mdss_mdp/qcom,mdss_fb_primary.134/leds/lcd-backlight/brightnessand install msm-framebuffer-refresher package. Tomorrow i try install plasma-mobile, but problem with screen rotate not solve.
By zhenyolka on 2017-09-30T22:54:21
Edited by Ghost User