Re: drm: simpledrm: fbdev emulation error with CONFIG_DRM_SIMPLEDRM enabled

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Hi

On Wed, Aug 25, 2021, at 2:02 PM, Thomas Zimmermann wrote:
> 
> Oh, now simpledrm itself fills up the log with pointless messages. :/ 
> Looking at the file, there's plenty of Gnome buffer swapping. I suspect 
> that Gnome works? It's just the console that's not available?
> 

Yes, Gnome was working, only the console was blank.

> Could you please boot directly into a text terminal? That should be 
> possible by adding systemd.unit=multi-user.target to the kernel command 
> line if your distro uses systemd. Due to the issue, you probably won't 
> see anything on the screen, so you may need remote access.
> 
> Thanks for your help with debugging and sorry for sending you through so 
> many hops.
> 
> Best regards
> Thomas
>

No problem, managed to boot directly into a text terminal and grabbed DRM
related dmesg log.
Hopefully it's what you're looking for :)

Find it attached please.

-- 
thanks,
Amanoel
[    3.255312] [drm:0xffffffffc034f0cc] Initialized
[    3.263276] simple-framebuffer simple-framebuffer.0: [drm:0xffffffffc03976b4] display mode={"1024x768": 60000 47185920 1024 1024 1024 1024 768 768 768 768 0x40 0x0}
[    3.263281] simple-framebuffer simple-framebuffer.0: [drm:0xffffffffc03976d7] framebuffer format=AR24 little-endian (0x34325241), size=1024x768, stride=4096 byte
[    3.263308] [drm:0xffffffffc02ebccb] 
[    3.263309] [drm:0xffffffffc02ebe94] 
[    3.263340] [drm:0xffffffffc02ebef8] new minor registered 0
[    3.263351] [drm:0xffffffffc02ecc48] adding "Unknown-1" to sysfs
[    3.263352] [drm:0xffffffffc02ecaea] generating hotplug event
[    3.263356] [drm] Initialized simpledrm 1.0.0 20200625 for simple-framebuffer.0 on minor 0
[    3.263359] [drm:0xffffffffc0319519] 
[    3.263360] [drm:0xffffffffc0308231] OBJ ID: 31 (2)
[    3.263362] [drm:0xffffffffc03682a0] [CONNECTOR:31:Unknown-1]
[    3.263363] [drm:0xffffffffc0368374] [CONNECTOR:31:Unknown-1] status updated from unknown to connected
[    3.263370] [drm:0xffffffffc0368605] [CONNECTOR:31:Unknown-1] probed modes :
[    3.263371] [drm:0xffffffffc02f0c23] Modeline "1024x768": 60000 47185920 1024 1024 1024 1024 768 768 768 768 0x48 0x0
[    3.263373] [drm:0xffffffffc0319793] connector 31 enabled? yes
[    3.263374] [drm:0xffffffffc0319b7b] Not using firmware configuration
[    3.263375] [drm:0xffffffffc0319de3] looking for cmdline mode on connector 31
[    3.263376] [drm:0xffffffffc031a2cb] looking for preferred mode on connector 31 0
[    3.263377] [drm:0xffffffffc0319edd] found mode 1024x768
[    3.263378] [drm:0xffffffffc031a0b9] picking CRTCs for 1024x768 config
[    3.263379] [drm:0xffffffffc031a205] desired mode 1024x768 set on crtc 34 (0,0)
[    3.263380] [drm:0xffffffffc0308231] OBJ ID: 31 (2)
[    3.263381] [drm:0xffffffffc03082e1] OBJ ID: 31 (3)
[    3.263383] simple-framebuffer simple-framebuffer.0: [drm:0xffffffffc037cf4f] test CRTC 0 primary plane
[    3.263384] simple-framebuffer simple-framebuffer.0: [drm:0xffffffffc037fdda] surface width(1024), height(2304) and bpp(32)
[    3.263394] [drm:0xffffffffc0303583] bad framebuffer height 2304, should be >= 768 && <= 768
[    3.263398] simple-framebuffer simple-framebuffer.0: [drm] *ERROR* fbdev: Failed to setup generic emulation (ret=-22)
[    3.263399] simple-framebuffer simple-framebuffer.0: [drm:0xffffffffc037e9fe] client hotplug ret=-22
[   14.704171] systemd[1]: Starting Load Kernel Module drm...
[   14.711105] systemd[1]: modprobe@drm.service: Deactivated successfully.
[   14.711253] systemd[1]: Finished Load Kernel Module drm.

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