Resolution test failed since xrandr cannot find mode

[Jerry Kao]

Title: Resolution test failed since xrandr cannot find mode

Summary:
When run cycle_resolution test, some resolutions are failed to adjust since xrandr cannot find those modes and checbox got fail result. In unity display settings, all resolutions are adjustable even xrandr can not find the mode.

Following resolutions are adjustable in display settings but failed in checkbox test, even failed when run xrandr --output eDP1 --mode

xrandr: cannot find mode 960x720
xrandr: cannot find mode 928x696
xrandr: cannot find mode 896x672
xrandr: cannot find mode 960x600
xrandr: cannot find mode 960x540

Following resolutions are not in display settings and failed in checkbox test

xrandr: cannot find mode 840x525
xrandr: cannot find mode 800x512
xrandr: cannot find mode 700x525
xrandr: cannot find mode 640x512
xrandr: cannot find mode 720x450

xrandr: cannot find mode 680x384
xrandr: cannot find mode 576x432
xrandr: cannot find mode 512x384
xrandr: cannot find mode 400x300
xrandr: cannot find mode 320x240

It seems unity settings has filtered those non-adjustable resolutions.
I was wondering what makes the different between xrandr and unity settings.

Steps: run cycle_resolutions test

Expected results: cycle_resolution can be run

Actual results:
1. some resolutions in xrandr are not listed in unity display settings and failed in checkbox test
2. some resolutions failed in checkbox test but can be adjusted with display settings
3. all resolutions in unity display settings are adjustable

Additional information: CNR7-DVT1-C2 (201608-25052)

Image: somerville-xenial-amd64-20160624-2

CPU: Genuine Intel(R) CPU 0000 @ 2.70GHz (8x)

GPU:
00:02.0 VGA compatible controller: Intel Corporation Device 591b (rev 01)
01:00.0 VGA compatible controller: NVIDIA Corporation Device 1bb8 (rev a1)

Manufacturer: Dell Inc.

ProductName: Precision 7720

BiosVersion: 00.00.09

[Jerry Kao (jerry.kao)]

lightdm.log:

[Jerry Kao (jerry.kao)]

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[Jerry Kao (jerry.kao)]

resolution modes in xrandr and unity display settings

[Jerry Kao (jerry.kao)]

checkbox log

[Daniel van Vugt (vanvugt)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. This particular bug has already been reported and is a duplicate of bug 1606103, so it is being marked as such. Please look at the other bug report to see if there is any missing information that you can provide, or to see if there is a workaround for the bug. Additionally, any further discussion regarding the bug should occur in the other report. Feel free to continue to report any other bugs you may find.

[Jerry Kao (jerry.kao)]

I would like to keep this bug open in plainbox-provider-checkbox as this issue still can be seen in some system and there is no progress in LP:1606103 so far.

[Maciej Kisielewski (kissiel)]

I tried to create a system configuration where I would get those 'unsettable' low resolutions with no luck so far.

I think this bug should be closed, as:

This isn't really a plainbox-provider-checkbox bug (nor checkbox-related).
There is a bug report already submitted, LP:1606103

I'm recommending marking this as a duplicate.

[Chris Wayne (cwayne)]

Will this still be an issue with the latest changes to the resolution test where fewer resolutions are being tested?

[Alex Wen (ronglu-wen)]

This bug also reproduced on Sutton project Tata2-intel-1.

Plainbox verison: 0.38.0
Test machine: Tata2-intel-1
Image: sutton-wilkes-xenial-amd64-20171107-8
CPU: Intel(R) Pentium(R) CPU 4405U @ 2.10GHz (family: 0x6, model: 0x4e, stepping: 0x3)
GPU: Intel Corporation Device [8086:1906] (rev 07) (prog-if 00 [VGA controller])
BIOS: 7TCN05WW(V0.05T13)

[Alex Wen (ronglu-wen)]

The log reproduced on Sutton project Tata2-Intel-1 check from https://paste.ubuntu.com/26032746/

[Alex Wen (ronglu-wen)]

Xrandr result on Tata2-Intel-1:
u@u-Lenovo-E41-20:~$ cat xrandr
Screen 0: minimum 320 x 200, current 1366 x 768, maximum 8192 x 8192
eDP-1 connected primary 1366x768+0+0 (normal left inverted right x axis y axis) 309mm x 173mm
   1366x768 60.00*+
   1360x768 59.80 59.96
   1024x768 60.04 60.00
   960x720 60.00
   928x696 60.05
   896x672 60.01
   960x600 60.00
   960x540 59.99
   800x600 60.00 60.32 56.25
   840x525 60.01 59.88
   800x512 60.17
   700x525 59.98
   640x512 60.02
   720x450 59.89
   640x480 60.00 59.94
   680x384 59.80 59.96
   576x432 60.06
   512x384 60.00
   400x300 60.32 56.34
   320x240 60.05
HDMI-1 disconnected (normal left inverted right x axis y axis)
DP-1 disconnected (normal left inverted right x axis y axis)
HDMI-2 disconnected (normal left inverted right x axis y axis)

The following resoultion can find in Display setting.
1366x768
1360x768
1024x768
960x720
960x600
960x540
928x696
896x672
800x600

[Jerry Kao (jerry.kao)]

@Chris, this issue still can be reproduced with new resolution test mechanism. Please refer https://paste.ubuntu.com/26032746/

Failed resolutions, 800x512 640x512, are highest resolution in each ratio.

Another problem is, 960x540 should not be tested since there are higher resolutions (1366x768, 1360x768) for ratio 16:9.

[Jerry Kao (jerry.kao)]

@Maciej, any updates?

[Maciej Kisielewski (kissiel)]

Got a new machine, will retry reproducing it. More info on Monday.

[Maciej Kisielewski (kissiel)]

No luck. I will need access to the machine that misbehaves.

[Betty Lin (bettyl)]

@Maciej

The bug existed in 18.04 too.

The test results were different between 16.04 and 18.04 on the same machine.

16.04 - pass
https://certification.canonical.com/hardware/201706-25570/submission/120946/test/70051/result/8973687/

18.04 - fail
https://certification.canonical.com/hardware/201706-25570/submission/129482/test/74023/result/9668871/

[Betty Lin (bettyl)]

@Maciej

Tested the checkbox r2 testing ppa, both 16.04 and 18.04 got problem with the resolution 960 x xxx, the information as below:

checkbox version:
checkbox-ng: 1.2.0rc3
checkbox-support: 0.39.0rc2
com.canonical.ce:oem: 1.0
certification-client: 0.35.0rc2
plainbox-provider-checkbox: 0.46.0rc2
plainbox-provider-resource-generic: 0.38.0rc2
plainbox-provider-tpm2: 1.8.0rc2

16.04 fail report:
https://certification.canonical.com/hardware/201606-22445/submission/132616/

18.04 fail report:
https://certification.canonical.com/hardware/201612-25303/submission/132614/

[Maciej Kisielewski (kissiel)]

Fix proposed here:
https://code.launchpad.net/~kissiel/plainbox-provider-checkbox/+git/plainbox-provider-checkbox/+merge/379963