boot/hw_intfc.conf
已经改过了，取消注释后重启也没用，也不知道在哪里更改分辨率
5寸屏幕分辨率为480*800
官方七寸好像分辨率更高
不知道如何更改配置文件，或者命令
Rock pi 4 plus MIPI 使用5寸屏幕不显示
补充说明：
使用的是Ubuntu 20.04 ，屏幕硬件和树莓派是兼容的，开机瞬间背光好像能闪一下。
内核版本是什么？用的屏是哪家的型号？发一下 kernel 的 dmesg 看看。
十分感谢回复的这么快！
我也不知道是不是这些：
Linux version 4.4.154-112-rockchip-gfdb18c8bab17 (root@5d2d5db63a95) (gcc version 7.3.1 20180425 [l] (Linaro GCC 7.3-2018.05) ) #1 SMP Thu Jan 21 04:50:13 UTC 2021
[ 4.489548] rockchip-drm display-subsystem: dmc is disabled
[ 4.490408] rockchip-vop ff900000.vop: missing rockchip,grf property
[ 4.491224] rockchip-drm display-subsystem: bound ff900000.vop (ops 0xffffff8008d5b828)
[ 4.491961] rockchip-vop ff8f0000.vop: missing rockchip,grf property
[ 4.492681] rockchip-drm display-subsystem: bound ff8f0000.vop (ops 0xffffff8008d5b828)
[ 4.493885] dwhdmi-rockchip ff940000.hdmi: registered DesignWare HDMI I2C bus driver
[ 4.494675] dwhdmi-rockchip ff940000.hdmi: Detected HDMI TX controller v2.11a with HDCP (DWC HDMI 2.0 TX PHY)
[ 4.500517] rockchip-drm display-subsystem: bound ff940000.hdmi (ops 0xffffff8008d51f80)
[ 4.501690] rockchip-drm display-subsystem: bound ff968000.dsi (ops 0xffffff8008d53530)
[ 4.502410] [drm] Supports vblank timestamp caching Rev 2 (21.10.2013).
[ 4.503003] [drm] No driver support for vblank timestamp query.
[ 4.503943] rockchip-drm display-subsystem: failed to parse loader memory
[ 4.511058] rockchip-vop ff8f0000.vop: [drm:vop_crtc_enable] Update mode to 800x480p60, type: 16
[ 4.512444] dw-mipi-dsi ff968000.dsi: final DSI-Link bandwidth: 720 x 1 Mbps
[ 4.517829] panel enable
[ 4.537915] rockpi_mcu_screen_power_up
[ 4.537916] dw-mipi-dsi ff968000.dsi: generic write fifo is full
[ 4.537928] bridge-tc358762-dsi ff968000.dsi.0: failed to writing gen seq
[ 4.557970] dw-mipi-dsi ff968000.dsi: generic write fifo is full
[ 4.557975] bridge-tc358762-dsi ff968000.dsi.0: failed to writing gen seq
[ 4.841512] Console: switching to colour frame buffer device 100x30
[ 4.889081] rockchip-drm display-subsystem: fb0: frame buffer device
屏幕的话没有厂家，tb找的最便宜的