你好，
我刚刚将 Ubuntu 18.04.1 安装到服务器上，该服务器内置有 Supermicro 主板 X11SSH-TF 和显卡 Aspeed AST2400 BMC，启动过程中图形变慢。
启动时分辨率会改变（无法校准液晶显示器），所有东西都会变慢。液晶显示器通过 VGA 电缆连接（主板上没有其他连接器）。
当我尝试安装 Aspeed 驱动程序时，返回以下消息：Can't find proper X Window Version, Please update driver manually!!
此外，Ubuntu Server 安装程序比屏幕“更大”。
任何想法？
dmesg：
[ 9.593618] ata2.00: Enabling discard_zeroes_data
[ 11.182667] AVX2 version of gcm_enc/dec engaged.
[ 11.182667] AES CTR mode by8 optimization enabled
[ 12.141034] sdb: sdb1
[ 12.141037] sda: sda1
[ 12.141177] ata1.00: Enabling discard_zeroes_data
[ 12.144946] sd 0:0:0:0: [sda] supports TCG Opal
[ 12.144948] sd 0:0:0:0: [sda] Attached SCSI disk
[ 12.501827] ata2.00: Enabling discard_zeroes_data
[ 12.576187] sd 1:0:0:0: [sdb] supports TCG Opal
[ 12.644806] sd 1:0:0:0: [sdb] Attached SCSI disk
[ 12.712732] dca service started, version 1.12.1
[ 12.784242] ixgbe: Intel(R) 10 Gigabit PCI Express Network Driver - version 5.1.0-k
[ 12.784676] [drm] Using P2A bridge for configuration
[ 12.784687] [drm] AST 2400 detected
[ 12.784777] [drm] Analog VGA only
[ 12.784890] [drm] dram MCLK=408 Mhz type=1 bus_width=16 size=01000000
[ 12.784953] [TTM] Zone kernel: Available graphics memory: 16380210 kiB
[ 12.784954] [TTM] Zone dma32: Available graphics memory: 2097152 kiB
[ 12.784954] [TTM] Initializing pool allocator
[ 12.784964] [TTM] Initializing DMA pool allocator
[ 13.036775] checking generic (de000000 6c0000) vs hw (de000000 1000000)
[ 13.036775] fb: switching to astdrmfb from VESA VGA
[ 13.299132] md/raid1:md0: active with 2 out of 2 mirrors
[ 13.304440] md0: detected capacity change from 0 to 499970473984
[ 13.311544] random: fast init done
[ 13.761199] ixgbe: Copyright (c) 1999-2016 Intel Corporation.
[ 13.761261] Console: switching to colour dummy device 80x25
[ 13.761405] random: systemd-udevd: uninitialized urandom read (16 bytes read)
[ 13.761455] random: systemd-udevd: uninitialized urandom read (16 bytes read)
[ 13.761458] random: systemd-udevd: uninitialized urandom read (16 bytes read)
[ 13.761486] fbcon: astdrmfb (fb0) is primary device
[ 14.504339] ixgbe 0000:04:00.0: Multiqueue Enabled: Rx Queue count = 8, Tx Queue count = 8 XDP Queue count = 0
[ 14.547375] ixgbe 0000:04:00.0: PCI Express bandwidth of 32GT/s available
[ 14.547376] ixgbe 0000:04:00.0: (Speed:8.0GT/s, Width: x4, Encoding Loss:<2%)
[ 14.576058] ixgbe 0000:04:00.0: MAC: 4, PHY: 0, PBA No: 020A00-000
[ 14.576059] ixgbe 0000:04:00.0: ac:1f:6b:6a:a8:7e
[ 14.741565] ixgbe 0000:04:00.0: Intel(R) 10 Gigabit Network Connection
[ 15.304828] Console: switching to colour frame buffer device 240x67
[ 15.483836] ixgbe 0000:04:00.1: Multiqueue Enabled: Rx Queue count = 8, Tx Queue count = 8 XDP Queue count = 0
[ 15.526960] ixgbe 0000:04:00.1: PCI Express bandwidth of 32GT/s available
[ 15.526961] ixgbe 0000:04:00.1: (Speed:8.0GT/s, Width: x4, Encoding Loss:<2%)
[ 15.555653] ixgbe 0000:04:00.1: MAC: 4, PHY: 0, PBA No: 020A00-000
[ 15.555654] ixgbe 0000:04:00.1: ac:1f:6b:6a:a8:7f
[ 15.720304] ixgbe 0000:04:00.1: Intel(R) 10 Gigabit Network Connection
[ 15.721062] ixgbe 0000:04:00.1 eno2: renamed from eth1
[ 16.847126] ast 0000:03:00.0: fb0: astdrmfb frame buffer device
[ 16.868358] [drm] Initialized ast 0.1.0 20120228 for 0000:03:00.0 on minor 0
[ 16.904552] ixgbe 0000:04:00.0 eno1: renamed from eth0
[ 18.796028] raid6: sse2x1 gen() 13982 MB/s
[ 18.844037] raid6: sse2x1 xor() 9906 MB/s
[ 18.892035] raid6: sse2x2 gen() 16623 MB/s
[ 18.940034] raid6: sse2x2 xor() 11083 MB/s
[ 18.988033] raid6: sse2x4 gen() 19519 MB/s
[ 19.036037] raid6: sse2x4 xor() 12315 MB/s
[ 19.084027] raid6: avx2x1 gen() 27847 MB/s
[ 19.132027] raid6: avx2x1 xor() 17879 MB/s
[ 19.180027] raid6: avx2x2 gen() 32031 MB/s
[ 19.228027] raid6: avx2x2 xor() 19091 MB/s
[ 19.276027] raid6: avx2x4 gen() 38101 MB/s
[ 19.324027] raid6: avx2x4 xor() 24201 MB/s
[ 19.324035] raid6: using algorithm avx2x4 gen() 38101 MB/s
[ 19.324046] raid6: .... xor() 24201 MB/s, rmw enabled
[ 19.324068] raid6: using avx2x2 recovery algorithm
[ 19.324897] xor: automatically using best checksumming function avx
[ 19.325431] async_tx: api initialized (async)
[ 19.436594] Btrfs loaded, crc32c=crc32c-intel
[ 20.396339] EXT4-fs (md0): mounted filesystem with ordered data mode. Opts: (null)
[ 22.961498] ip_tables: (C) 2000-2006 Netfilter Core Team
[ 22.966175] systemd[1]: systemd 237 running in system mode. (+PAM +AUDIT +SELINUX +IMA +APPARMOR +SMACK +SYSVINIT +UTMP +LIBCRYPTSETUP +GCRYPT +GNUTLS +ACL +XZ +LZ4 +SECCOMP +BLKID +ELFUTILS +KMOD -IDN2 +IDN -PCRE2 default-hierarchy=hybrid)
[ 22.984181] systemd[1]: Detected architecture x86-64.
[ 25.507486] systemd[1]: Set hostname to <server>.
[ 25.571535] systemd[1]: Set up automount Arbitrary Executable File Formats File System Automount Point.
[ 28.920621] systemd[1]: Created slice User and Session Slice.
[ 30.789892] systemd[1]: Created slice System Slice.
[ 32.659232] systemd[1]: Listening on Journal Audit Socket.
[ 34.533482] systemd[1]: Listening on fsck to fsckd communication Socket.
[ 36.416057] systemd[1]: Listening on udev Control Socket.
[ 38.289899] systemd[1]: Listening on LVM2 metadata daemon socket.
[ 40.165592] systemd[1]: Listening on Journal Socket.
[ 42.045067] systemd[1]: Mounting Kernel Debug File System...
[ 43.926966] systemd[1]: Listening on Device-mapper event daemon FIFOs.
[ 45.810510] systemd[1]: Mounting Huge Pages File System...
[ 47.696070] systemd[1]: Starting Create list of required static device nodes for the current kernel...
[ 49.596305] systemd[1]: Reached target Slices.
[ 51.488378] systemd[1]: Starting Set the console keyboard layout...
[ 53.390141] systemd[1]: Starting Uncomplicated firewall...
[ 55.294611] systemd[1]: Starting Remount Root and Kernel File Systems...