Comment # 5 on bug 1185994 from David Walker

(In reply to QK ZHU from comment #4)
> Could you provide the output of:
> > sudo lspci -v | grep -i vga
> > sudo lsmod | grep "kms\|drm"

Here you go. By the way, it occurs to me that the Wayland / Xorg difference
between the laptops is in the option selected when logging in. It occurs to me
that I don't really know which of them is used by GDM.

Laptop running Wayland
----------------------
> sudo lspci -v | grep -i vga
00:02.0 VGA compatible controller: Intel Corporation WhiskeyLake-U GT2 [UHD
Graphics 620] (prog-if 00 [VGA controller])
> sudo lsmod | grep "kms\|drm"
drm_kms_helper        286720  1 i915
syscopyarea            16384  1 drm_kms_helper
sysfillrect            16384  1 drm_kms_helper
sysimgblt              16384  1 drm_kms_helper
fb_sys_fops            16384  1 drm_kms_helper
cec                    61440  2 drm_kms_helper,i915
drm                   573440  10 drm_kms_helper,i915

Laptop running Xorg
-------------------
> sudo lspci -v | grep -i vga
00:02.0 VGA compatible controller: Intel Corporation HD Graphics 620 (rev 02)
(prog-if 00 [VGA controller])
> sudo lsmod | grep "kms\|drm"
drm_kms_helper        286720  1 i915
syscopyarea            16384  1 drm_kms_helper
sysfillrect            16384  1 drm_kms_helper
sysimgblt              16384  1 drm_kms_helper
fb_sys_fops            16384  1 drm_kms_helper
cec                    61440  2 drm_kms_helper,i915
drm                   573440  7 drm_kms_helper,i915