** Attachment added: "This screen bure on UEFI model for 18.04 classic d-i 
installer in the first installer screen of language select"
   
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1762940/+attachment/5141063/+files/uefi-di-screen-blur.png

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https://bugs.launchpad.net/bugs/1762940

Title:
  Ubuntu 18.04 install screen becomes blur on Huawei server

Status in linux package in Ubuntu:
  Triaged
Status in install-package source package in Bionic:
  New
Status in linux source package in Bionic:
  Triaged

Bug description:
  For all(as I know) Huawei servers, the vga adapter are embed in the
  iBMC chips. Those server can install from ISO manually for 16.04.4 and
  screen display normally. But for 18.04 ( tested both for daily and
  final beta)version, the install screen is blur. One of tested server
  is Huawei 2855 v5, the certification link for 16.04 are
  https://certification.ubuntu.com/hardware/201707-25596/.

  Below are key difference of dmesg. It seems might related with DRM.

  18.04 install screen is blur 
  dmesg
  ...
  [    2.039009] fb0: EFI VGA frame buffer device
  ...
  [    4.178058] [drm] Supports vblank timestamp caching Rev 2 (21.10.2013).
  [    4.191435] [drm] No driver support for vblank timestamp query.
  [    4.209338] checking generic (90000000 300000) vs hw (0 0)
  [    4.209384] fbcon: hibmcdrmfb (fb1) is primary device
  [    4.209385] fbcon: Remapping primary device, fb1, to tty 1-63
  ...
  [    5.357024] hibmc-drm 0000:07:00.0: fb1: hibmcdrmfb frame buffer device
  [    5.380085] [drm] Initialized hibmc 1.0.0 20160828 for 0000:07:00.0 on 
minor 0
  ...
  [    5.636624] vga16fb: initializing
  [    5.636627] vga16fb: mapped to 0x0000000048a7a1d2
  [    5.636630] checking generic (90000000 300000) vs hw (a0000 10000)
  [    5.636676] fb2: VGA16 VGA frame buffer device
  ...

  16.04.4 install screen is fine (no screen blur)
  dmesg
  ...
  [    2.000419] fb0: EFI VGA frame buffer device
  ....
  [    8.795065] vga16fb: initializing
  [    8.795068] vga16fb: mapped to 0xffff8800000a0000
  [    8.795071] checking generic (98000000 300000) vs hw (a0000 10000)
  [    8.795121] fb1: VGA16 VGA frame buffer device
  ...

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