UI crash and black screen issues with 9.0 RC1

[BrokenE39]

I finally got around to compile a custom 9.0 RC1 image and install it on my tablet. I notice the following issues, not sure if they are known already:

1. Screen turns off and back on when you rotate the device
2. Single press of power button would temporary lock up the device and it will display "Tablet is starting" message on the screen just like when you power on the device
3. Waking up the device from sleep (long press and select Sleep from the menu), would also lock up the device temporarily and show the "Tablet is starting" message
4. Whenever it crash and recovers, the network is knocked offline
5. Attempt to cycle the Wifi would also lock up the device like #3

I checked dmesg and couldn't find anything obviously wrong. I'll try to attached a copy of it tomorrow.

[youling 257]

seem screenshot and sleep only work under vulkan mode.

[Daniel Cheung]

Forgot to mention, my device is a X8300 Intel Cherrytrail so it's using the i915 driver.

On Sun, Dec 29, 2019 at 7:40 PM youling 257 <youli...@gmail.com> wrote:

seem screenshot and sleep only work under vulkan mode.

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[Daniel Cheung]

DMESG log attached. Please look at timestamp [ 9885.292410], that's when the device went to sleep. 

[youling 257]

Sleep states might not be working right by default on non Vulkan & IA-Hardware-Composer builds (Still working on it). Some can cause SystemUI to restart (lockscreens won't be of any use due to this)

You will need to select Vulkan from advanced grub menu, or manually add "VULKAN=1" to Grub command line

在 2020年1月1日星期三 UTC+8上午5:36:39，BrokenE39写道：

DMESG log attached. Please look at timestamp [ 9885.292410], that's when the device went to sleep. 

On Sun, Dec 29, 2019 at 7:46 PM Daniel Cheung <dwt....@gmail.com> wrote:

Forgot to mention, my device is a X8300 Intel Cherrytrail so it's using the i915 driver.

On Sun, Dec 29, 2019 at 7:40 PM youling 257 <youli...@gmail.com> wrote:

seem screenshot and sleep only work under vulkan mode.

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[Daniel Cheung]

I understand it's a RC release so not expecting everything to work, just reporting what I found so far. I didn't expect Vulkan to support Intel GPU but apparently I'm wrong since Wiki say it does support HD Graphics. I'll give the GRUB command a try and report back. Thanks & Happy New Year!

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[Faheem Ahmad]

dear, please ask for a simpler UI based remix os like installer for androidx86 so more people could use it

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[Daniel Cheung]

A quick report back using Vulkan=1 option in GRUB.

• Screen rotation still gave me a black screen first before showing the screen in the right orientation. The duration of the black screen is shorter compare to not using VULKAN=1.
• Wake from sleep behavior was worst then before.
• Short press power button and the screen turns on
• Screen turns off again and doesn't seem to turn back on
• Short press power button again and "Tablet is starting" message is displayed
• Previous wake from sleep behavior
• Short press power button and screen turns on
• Screen dims and UI locks up
• Screen then turns off and back on again with "Tablet is starting" message

So for now, I would say VULKAN=1 doesn't work for my specific device. I'm going to stick with 9.0 RC1 since it got better sleep behavior than 8.0 R3 (see my other thread about black screen on wake). At least I'm guarantee that the screen will turn back on with 9.0 compare to 8.x. Also, it seem to have better GPU performance (less lag in apps). Look forward to the next RC release and hope we get kernel 5.x since there is some kind of driver regression with RTL8723BS in between kernel 4.9 and 4.19.

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[ouija]

I have similar issues running Android 9.0r2 on a Toshiba WT8-B:

• Single press of power button would temporary lock up the device and it will display "Tablet is starting" message on the screen just like when you power on the device

• • Note that using the 0001-ISurfaceComposer-Workaround-for-screenshots-on-intel.patch and building from source has fixed this issue!
• Resume from sleep wasn't working, but adding setprop power.nonboot-cpu-off 0 to the init.sh for my device seems to have helped.   I also came across this post which indicates that setting GRALLOC=gbm  boot argument in GRUB might help as well.
• The display "flashes" before the orientation changes when the device is rotated (like Android is taking a screenshot), which isn't a huge deal but kind of annoying (wasn't happening prior to 9.0r2)

Otherwise this device seems to be running okay for the most part, but I've only managed to get 9.0r2 running today, so time will tell!

[Daniel Cheung]

Hey ouija, thanks for the GRALLOC setting, that fixed my wake then crash issue. However, have you figured out why the clock won't network sync after waking up? The time is messed up after waking up.

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[ouija]

I'm still testing issues with this on my device.   What I've discovered is that this  0001-ISurfaceComposer-Workaround-for-screenshots-on-intel.patch only seems to resolve the crash if choosing the engineering build (eng) vs the userdebug build, but eng breaks developer options.

With userdebug, the device doesn't crash/restart the xserver or whatever but puts the device into a non-recoverable black screen.

Very odd.

[Daniel Cheung]

Well I think I solved the wrong time on wake issue by adding intel_idle.max_cstate=4 in grub. Not sure if it will work for AMD CPU but it seem to fixed it on my Atom tablet. This doesn't fix the non-recoverable black screen issue. If I recall, it doesn't really matter if you are using non boot CPU power off 0 or 1 in init.sh. I remember reading something on this forum that it's only affecting 9.0 and nothing wrong with 10. But I also heard there's no native bridge for 10.

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[crw]

Try kernel 5.8 from bliss os, kernel 5.8 is used in bliss os android 10