** Changed in: linux (Ubuntu Artful) Importance: Undecided => Medium ** Changed in: linux (Ubuntu Bionic) Importance: Undecided => Medium
** Tags added: artful bionic kernel-da-key -- 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 https://bugs.launchpad.net/bugs/1755304 Title: Regression: vga term no longer active on Cavium ThunderX Status in linux package in Ubuntu: Triaged Status in linux source package in Artful: Triaged Status in linux source package in Bionic: Triaged Bug description: Cavium ThunderX-based systems, such as the Cavium CRBs and Gigabyte implementations, have an ASPEED VGA controller that can be viewed remotely using a JAVA application exposed by the BMC. The kernel will use serial as the default console on this platform but, with the xenial GA (4.4) kernel, boot messages and a login prompt would also appear on the VGA display once the DRM stack was initialized during boot. You could also override the console default w/ console=tty0 if, for example, you wanted to do a d-i install over VGA instead of serial. This is no longer the case with later kernels. The significant difference is that CONFIG_FB_EFI is now enabled, starting with this commit: commit 44b343e7dd648d738a6b752a81c1ad60c8e0c9b0 Author: Seth Forshee <seth.fors...@canonical.com> Date: Tue Nov 15 13:45:04 2016 -0600 UBUNTU: [Config] Enable various drivers for ARM platforms This driver detects an EFI framebuffer device, and uses that as the default VGA device instead of the ASPEED: [ 6.426569] efifb: probing for efifb [ 6.430174] efifb: framebuffer at 0x10000000, using 1200k, total 1200k [ 6.436703] efifb: mode is 640x480x32, linelength=2560, pages=1 [ 6.442623] efifb: scrolling: redraw [ 6.446199] efifb: Truecolor: size=8:8:8:8, shift=24:16:8:0 [ 6.454324] Console: switching to colour frame buffer device 80x30 [ 6.462878] fb0: EFI VGA frame buffer device ... [ 9.320983] ast 0004:21:00.0: enabling device (0002 -> 0003) [ 9.321192] [drm] Using P2A bridge for configuration [ 9.321195] [drm] AST 2400 detected [ 9.321202] [drm] Analog VGA only [ 9.321213] [drm] dram MCLK=408 Mhz type=6 bus_width=16 size=01000000 [ 9.321351] [TTM] Zone kernel: Available graphics memory: 65994474 kiB [ 9.321353] [TTM] Zone dma32: Available graphics memory: 2097152 kiB [ 9.321354] [TTM] Initializing pool allocator [ 9.321386] [TTM] Initializing DMA pool allocator ... [ 9.696100] ast 0004:21:00.0: fb1: astdrmfb frame buffer device A workaround for this is to disable the efifb device using "video=efifb:off". With that in place, I again see output on the ASPEED device: [ 8.799297] ast 0004:21:00.0: enabling device (0002 -> 0003) [ 8.799449] [drm] Using P2A bridge for configuration [ 8.799452] [drm] AST 2400 detected [ 8.799459] [drm] Analog VGA only [ 8.799470] [drm] dram MCLK=408 Mhz type=6 bus_width=16 size=01000000 [ 8.799602] [TTM] Zone kernel: Available graphics memory: 65994474 kiB [ 8.799604] [TTM] Zone dma32: Available graphics memory: 2097152 kiB [ 8.799605] [TTM] Initializing pool allocator [ 8.799614] [TTM] Initializing DMA pool allocator [ 8.954255] Console: switching to colour frame buffer device 128x48 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1755304/+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
