Hey Mao, Is this visible after install? In other words can you install 16.04 on the failing system, then add the 4.15 kernel and boot into it?
Once you do that, does the issue appear? Just to summarize where we are: 16.04, 4.13: No problem 18.04, 4.15: Problem with frame buffer 16.04, 4.15: ??? -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1762940 Title: Ubuntu 18.04 install screen becomes blur on Huawei server Status in install-package package in Ubuntu: New 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 ... To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/install-package/+bug/1762940/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
