Board Name: Lars
CPU (including SKU, stepping): Intel(R) Celeron(R) CPU 3855U @ 1.60GHz
Memory Configuration: 4G
OS image version:9128.0.2016_12_28_1426
Chromium browser version: 56.0.2895.0
IGT version: f683929
Kernel version: 4.10.0-rc1-11391-g81f56e3
Bug detailed description
Install latest drm-intel-nightly kernel(4.10.0-rc1-11391-g81f56e3) on Chromebook, then unable to switch to console mode by press Ctrl-Alt-F2
1. Boot ChromeOS
2. When login screen is displayed, press Ctrl-Alt-F2
Switch to console mody after press Ctrl-Alt-F2
Unable to switch to console mode by press Ctrl-Alt-F2
Analysis & Root Cause
Can you attach kernel log and give some hints on the reason why you are suspecting i915?
Hi please review prior comments and important to add logs, once you provided the necessary information please move the bug to REOPEN state
This issue only can be reproduce on latest kernel(4.10.0-rc1-11391-g81f56e3). On ChromeOS default kernel(v3.18 for SKL), it works well. So we assume it's kernel related issue.
Which kernel log do you want? We will retest it and will catch dmesg log and update this issue later.
Once you update the bug with the dmesg please set the bug to REOPEN
Again as in your other bug #99470 there is no logs attach. here is information for you to help you
https://01.org/linuxgraphics/documentation/bugs-and-debugging please provide more information.
At the same time you can also use latest https://cgit.freedesktop.org/drm-tip to test
Once the information is provided again move the status to Reopen
Timeout - assuming to be fixed. If problem still persist please reopen bug with proper data (see https://01.org/linuxgraphics/documentation/how-report-bugs).
this issue could be reproduced on latest chrome os image + upstream kernel(drm-tip branch)
kernel version: 4.12.0-rc2-14320-gec077216f693-dirty
OS image version:9559.0.2017_05_23_1122
Chromium browser version: 60.0.3101.0
Firmware version: Google_Lars.7829,127.0
The screen show black when I use "Ctrl-Alt-F2" to switch to console.
dmesg shows :
[ 124.924367] frecon(260):
[ 124.924378] Could not set master when switching to foreground Invalid argument.
[ 124.924537] DEBUG: tsm_screen:
[ 124.924540] new screen
[ 124.924566] DEBUG: tsm_vte:
[ 124.924569] new vte object
and not able to switch back to UI by "Ctrl-Alt-F1",
dmesg log shows:
[ 125.891071] frecon(260):
[ 154.012310] frecon(260):
[ 154.012324] Chrome failed to take display ownership. Trying again.
[ 154.514180] frecon(260):
[ 154.514187] Chrome failed to take display ownership. Trying again.
[ 155.016262] frecon(260):
[ 155.016269] Chrome failed to take display ownership. Trying again.
[ 155.518382] frecon(260):
[ 163.208521] frecon(260):
[ 163.208537] Could not set master when switching to foreground Invalid argument.
[ 163.563262] frecon(260):
[ 163.563272] Unable to set crtc: Permission denied
[ 163.563510] frecon(260):
[ 163.563514] drmModeDirtyFB failed: Permission denied
Created attachment 131444 [details]
kernel log when switch between console and UI
close this bug since it is not a kernel bug and a patch in chromium can enable the console mode