Re: mgag200 broken on kernel-6.0-rc3 on DELL/T620

[Thomas Zimmermann <tzimmermann@suse.de>]

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Hi

Am 07.09.22 um 09:38 schrieb Wang Yugui:
> Hi,
> 
> 
>> Hi
>>
>> Am 07.09.22 um 06:16 schrieb Wang Yugui:
>>> Hi,
>>>
>>>> Am 02.09.22 um 07:52 schrieb Wang Yugui:
>>>>> Hi,
>>>>>
>>>>> mgag200 broken on kernel-6.0-rc3 on DELL/T620.
>>>>>
>>>>> See the attachementment file for the graph output.
>>>>
>>>> Thanks for reporting the bug. We recently refactored some code of the driver. Can you bisect to the change that introduced the problem?
>>>
>>> 5.19.3 works well on this DELL/T620.
>>>
>>> so this problem should be a regression of 6.0.
>>>
>>> other bisect seem difficult for me.
>>
>> OK, thank you. Can you provide the dmesg log of the broken machine and the output of 'sudo lspci -vn' please?
> 
> please see the attachment file for the output of 'lspci -vn'.

  0a:00.0 0300: 102b:0534 (prog-if 00 [VGA controller])

It's the G200ER. I'll try to find related code that we recently changed. 
I might get back to you for testing a patch. Thanks so far.

Best regards
Thomas

> 
> Best Regards
> Wang Yugui (wangyugui@e16-tech.com)
> 2022/09/07
> 
> 
>>
>> Best regards
>> Thomas
>>
>>>
>>> Best Regards
>>> Wang Yugui (wangyugui@e16-tech.com)
>>> 2022/09/07
>>>
>>>
>>>>
>>>> Best regards
>>>> Thomas
>>>>
>>>>>
>>>>> [root@T620 ~]# dmesg  |grep -i 'vga\|mga'
>>>>> [    0.588940] Console: colour VGA+ 80x25
>>>>> [    4.918214] pci 0000:0a:00.0: vgaarb: setting as boot VGA device
>>>>> [    4.919028] pci 0000:0a:00.0: vgaarb: bridge control possible
>>>>> [    4.919028] pci 0000:0a:00.0: vgaarb: VGA device added: decodes=io+mem,owns=io+mem,locks=none
>>>>> [    4.941058] vgaarb: loaded
>>>>> [    9.385485] mgag200 0000:0a:00.0: vgaarb: deactivate vga console
>>>>> [    9.510688] [drm] Initialized mgag200 1.0.0 20110418 for 0000:0a:00.0 on minor 0
>>>>> [    9.523145] fbcon: mgag200drmfb (fb0) is primary device
>>>>> [    9.641543] mgag200 0000:0a:00.0: [drm] fb0: mgag200drmfb frame buffer device
>>>>>
>>>>>
>>>>> more info:
>>>>> 1, This DELL/T620 works well with kernel 5.15.63,
>>>>>        so this is not a  hardware error.
>>>>>
>>>>> 2, DELL/T640 works well with kernel 6.0-rc and 5.15.63.
>>>>>        both DELL/T620 and DELL/T640 use the driver 'mgag200'.
>>>>>
>>>>> [root@T640 ~]#  dmesg  |grep -i 'vga\|mga'
>>>>> [   10.161500] pci 0000:03:00.0: vgaarb: setting as boot VGA device
>>>>> [   10.162463] pci 0000:03:00.0: vgaarb: VGA device added: decodes=io+mem,owns=io+mem,locks=none
>>>>> [   10.176527] pci 0000:03:00.0: vgaarb: bridge control possible
>>>>> [   10.182465] vgaarb: loaded
>>>>> [   11.832839] fb0: EFI VGA frame buffer device
>>>>> [   21.303826] mgag200 0000:03:00.0: vgaarb: deactivate vga console
>>>>> [   21.319498] [drm] Initialized mgag200 1.0.0 20110418 for 0000:03:00.0 on minor 0
>>>>> [   21.330223] fbcon: mgag200drmfb (fb0) is primary device
>>>>> [   21.332140] mgag200 0000:03:00.0: [drm] drm_plane_enable_fb_damage_clips() not called
>>>>> [   21.741629] mgag200 0000:03:00.0: [drm] fb0: mgag200drmfb frame buffer device
>>>>>
>>>>> Best Regards
>>>>> Wang Yugui (wangyugui@e16-tech.com)
>>>>> 2022/09/02
>>>>>
>>>> -- Thomas Zimmermann
>>>> Graphics Driver Developer
>>>> SUSE Software Solutions Germany GmbH
>>>> Maxfeldstr. 5, 90409 Nürnberg, Germany
>>>> (HRB 36809, AG Nürnberg)
>>>> Gesch?ftsführer: Ivo Totev
>>>
>>>
>> -- Thomas Zimmermann
>> Graphics Driver Developer
>> SUSE Software Solutions Germany GmbH
>> Maxfeldstr. 5, 90409 Nürnberg, Germany
>> (HRB 36809, AG Nürnberg)
>> Gesch?ftsführer: Ivo Totev
> 

-- 
Thomas Zimmermann
Graphics Driver Developer
SUSE Software Solutions Germany GmbH
Maxfeldstr. 5, 90409 Nürnberg, Germany
(HRB 36809, AG Nürnberg)
Geschäftsführer: Ivo Totev

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