How to capture runtime Chrome Browser logs

[appu s]

Dear All,

I need to capture only runtime chrome browser logs & other debug steps to identifying the reason for Chrome Browser Crash

I enabled the below flags

echo "vmodule=media/gpu=4,components/arc/video_accelerator/=4,ui/display=4" >> /etc/chrome_dev.conf

Could you please let me know, now how can I capture Chrome Browser logs during runtime or the debug steps to identifying the reason for Chrome Browser Crash.

Kindly do the needful,

Many thanks in advance.

[Harry Cutts]

You can find the logs for the browser in one of a few different places, described in the Chrome Logging on ChromeOS page. Assuming you're not using a test image and have logged in, you should look in /home/chronos/user/log/chrome.

Also, according to that page you need to add -- before vmodule (echo "--vmodule=...").

[appu s]

Many Thanks Harry for the tip!, Many thanks a lot for your quick responses, much appreciate for your help!

1. I will check them out for sure! Just to double check please, I am using the cpfe image & have logged in , may i know pls, still would I be able to get the browser logs using  echo "--vmodule=..." & "tail -F /var/log/chrome/chrome"?
2.  May I know please, along with this may I know please, how can I get the kernel log messages also, along with browser logs please?

Many thanks in advance again!

[Harry Cutts]

On Mon, 5 Sept 2022 at 18:17, appu s <appusha...@gmail.com> wrote:

Many Thanks Harry for the tip!, Many thanks a lot for your quick responses, much appreciate for your help!

1. I will check them out for sure! Just to double check please, I am using the cpfe image & have logged in , may i know pls, still would I be able to get the browser logs using  echo "--vmodule=..." & "tail -F /var/log/chrome/chrome"?

See the page I linked (emphasis mine):

/var/log/chrome/chrome : contains messages that are written before a user has logged in. It also contains messages written after login on test images, where Chrome runs with --disable-logging-redirect.

 

2.  May I know please, along with this may I know please, how can I get the kernel log messages also, along with browser logs please?

Kernel logs can be obtained from dmesg, just like on any Linux system.

Harry Cutts

ChromeOS Touch/Input team

[appu s]

Awesome, thanks!