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

[Thomas Zimmermann <tzimmermann@xxxxxxx>]

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@xxxxxxxxxxxx)
> 2022/09/07
>
>
> > Best regards
> > Thomas
> >
> > > Best Regards
> > > Wang Yugui (wangyugui@xxxxxxxxxxxx)
> > > 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@xxxxxxxxxxxx)
> > > > > 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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