linux-kernel - Re: After suspend/resume cycle ASPEED VGA monitor suffers with "No Signal" state.

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Message-ID: <ecf30bde-f7a7-434f-8be0-352c376a96ee@suse.de>
Date: Mon, 29 Apr 2024 09:16:59 +0200
From: Thomas Zimmermann <tzimmermann@...e.de>
To: Cary Garrett <cogarre@...il.com>, airlied@...hat.com
Cc: dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org
Subject: Re: After suspend/resume cycle ASPEED VGA monitor suffers with "No
 Signal" state.

Hi

Am 23.04.24 um 21:51 schrieb Cary Garrett:
> Hello,
>
> An Aspeed VGA monitor, in my case AST 2400, after a suspend/resume
> cycle suffers with a "No Signal" state. This is also true of a
> IPMI/BMC remote console. To restore the "Signal" state requires
> a reboot or the following workaround.
>
> To restore the "Signal" state without rebooting issue the
> following commands from a SSH session or serial console
> after every suspend/resume cycle:
>
>    sudo modprobe -r ast
>    sudo modprobe ast
>    
> This a home media server which is updated infrequently, so
> I am unable offer any guidance as to when this issue started
> occurring.

Just to clarify, suspend/resume did restore the display in earlier versions?

Best regards
Thomas

>
> Regards, Cary Garrett
>
>
>
> Current environment:
>
> uname -a:
> Linux xxxxxx-server 6.8.7-arch1-1 #1 SMP PREEMPT_DYNAMIC Wed, 17 Apr 2024 15:20:28 +0000 x86_64
> GNU/Linux
>
> modinfo:
> filename:       /lib/modules/6.8.7-arch1-1/kernel/drivers/gpu/drm/ast/ast.ko.zst
> license:        GPL and additional rights
> description:    AST
> author:         Dave Airlie
> firmware:       ast_dp501_fw.bin
> srcversion:     7E39455BCA2D11E968D8B2B
> alias:          pci:v00001A03d00002010sv*sd*bc03sc*i*
> alias:          pci:v00001A03d00002000sv*sd*bc03sc*i*
> depends:        i2c-algo-bit
> retpoline:      Y
> intree:         Y
> name:           ast
> vermagic:       6.8.7-arch1-1 SMP preempt mod_unload
> sig_id:         PKCS#7
> signer:         Build time autogenerated kernel key
> sig_key:        76:06:C7:84:BC:2F:C6:38:38:61:C1:6F:32:D5:6A:03:88:22:68:1C
> sig_hashalgo:   sha512
> signature:      30:66:02:31:00:AD:83:EB:D2:9B:91:E6:C3:9B:52:89:51:4B:BB:06:
> 		DE:D7:44:A6:6B:07:92:AA:75:2A:0B:20:26:73:58:09:DF:C3:86:C6:
> 		FC:B7:D4:13:5F:5D:35:4D:67:89:73:0E:C2:02:31:00:C3:98:99:67:
> 		B4:74:02:5C:6D:D3:81:13:D4:9F:B4:F4:CF:37:8A:7C:84:8C:73:BF:
> 		DF:4D:D5:34:B0:0A:CE:0E:59:67:28:98:07:BF:D7:FA:68:B3:37:43:
> 		02:1C:59:3E
> parm:           modeset:Disable/Enable modesetting (int)
>
> lspci:
> 04:00.0 VGA compatible controller: ASPEED Technology, Inc. ASPEED Graphics Family (rev 30) (prog-if
> 00 [VGA controller])
> 	DeviceName: Onboard VGA
> 	Subsystem: Super Micro Computer Inc Device 0804
> 	Control: I/O+ Mem+ BusMaster- SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR-
> FastB2B- DisINTx-
> 	Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR-
> <PERR- INTx-
> 	Interrupt: pin A routed to IRQ 16
> 	Region 0: Memory at f6000000 (32-bit, non-prefetchable) [size=16M]
> 	Region 1: Memory at f7000000 (32-bit, non-prefetchable) [size=128K]
> 	Region 2: I/O ports at d000 [size=128]
> 	Expansion ROM at 000c0000 [virtual] [disabled] [size=128K]
> 	Capabilities: [40] Power Management version 3
> 		Flags: PMEClk- DSI- D1+ D2+ AuxCurrent=375mA PME(D0+,D1+,D2+,D3hot+,D3cold+)
> 		Status: D0 NoSoftRst- PME-Enable- DSel=0 DScale=0 PME-
> 	Capabilities: [50] MSI: Enable- Count=1/4 Maskable- 64bit+
> 		Address: 0000000000000000  Data: 0000
> 	Kernel driver in use: ast
> 	Kernel modules: ast
>

-- 
--
Thomas Zimmermann
Graphics Driver Developer
SUSE Software Solutions Germany GmbH
Frankenstrasse 146, 90461 Nuernberg, Germany
GF: Ivo Totev, Andrew Myers, Andrew McDonald, Boudien Moerman
HRB 36809 (AG Nuernberg)