From: Wang Yugui <wangyugui@e16-tech.com>
To: Thomas Zimmermann <tzimmermann@suse.de>
Cc: Jocelyn Falempe <jfalempe@redhat.com>,
dri-devel <dri-devel@lists.freedesktop.org>
Subject: Re: mgag200 broken on kernel-6.0-rc3 on DELL/T620
Date: Thu, 15 Sep 2022 00:25:07 +0800 [thread overview]
Message-ID: <20220915002506.DE56.409509F4@e16-tech.com> (raw)
In-Reply-To: <9e801194-ea74-7298-c08c-de5eeb7444e6@suse.de>
Hi,
> Hi
>
> Am 14.09.22 um 16:58 schrieb Wang Yugui:
> > Hi,
> >
> >> (cc: Jocelyn)
> >>
> >> Hi
> >>
> >> Am 14.09.22 um 10:29 schrieb Wang Yugui:
> >>> Hi,
> >>>
> >>>
> >>>> Hi
> >>>>
> >>>> Am 13.09.22 um 17:15 schrieb Wang Yugui:
> >>>> [...]
> >>>>>>>
> >>>>>>> so I tried to revert patch of mgag200 driver in batch of 2 or 3, the I
> >>>>>>> noticed the patch 'Subject: drm/mgag200: Remove special case for G200SE
> >>>>>>> with <2 MiB' and then tried this dirty fix.
> >>>>>>
> >>>>>> Oh, great work! Thank you. From looking at the screenshot that you provided, it seems as if the 24-bit mode setting is broken. I'm not sure why the G200SE workaround applies to a G200ER, but we'll see.
> >>>>>
> >>>>> I tested 'preferred_depth = 32' too. it works on T630 too.
> >>>>>
> >>>>> so both 16 and 32 work, but 24 failed on DELL/T630.
> >>>>
> >>>> I tried on my test machine with a 5.19 kernel and found that 32-bit and 24-bit pixels work, but 16-bit looks incorrect.
> >>>>
> >>>> What are the results if you boot your kernel 5.19.3 with the parameter video=1024x768-24? This should enable 24-bit pixels.
> >>>>
> >>>> How does video=1024x768-16 look with the 5.19 kernel?
> >>>
> >>> test result here
> >>> kernel 5.19.3 & video=1024x768-24
> >>> dell/T620/centos-8.5 broken
> >>> dell/T630/centos-7.9 broken
> >>
> >> I assume that Centos 7 and 8 have fairly old kernels? So it's been a long-standing bug.
> >
> > We install kernel 5.19.3/5.15.67 into Centos 7 and 8.
> > default it work well. broken just when 'video=1024x768-24', so it may
> > not a long-standing bug.
>
> I don't quite understand. Does 'video=1024x768-24' work with 5.15.67?
kernel 5.15.67 with 'video=1024x768-24' is broken on DELL/T630.
kernel 5.15.67 without 'video=1024x768-24' works well on DELL/T630.
Best Regards
Wang Yugui (wangyugui@e16-tech.com)
2022/09/15
next prev parent reply other threads:[~2022-09-14 16:25 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20220902135242.2447.409509F4@e16-tech.com>
2022-09-05 6:57 ` mgag200 broken on kernel-6.0-rc3 on DELL/T620 Thomas Zimmermann
2022-09-07 4:16 ` Wang Yugui
2022-09-07 6:47 ` Thomas Zimmermann
2022-09-07 7:38 ` Wang Yugui
2022-09-07 7:55 ` Thomas Zimmermann
2022-09-07 8:47 ` Wang Yugui
2022-09-07 9:18 ` Thomas Zimmermann
2022-09-13 8:34 ` Thomas Zimmermann
2022-09-13 14:25 ` Wang Yugui
2022-09-13 14:44 ` Thomas Zimmermann
2022-09-13 15:15 ` Wang Yugui
2022-09-14 7:59 ` Thomas Zimmermann
2022-09-14 8:29 ` Wang Yugui
2022-09-14 14:36 ` Thomas Zimmermann
2022-09-14 14:58 ` Wang Yugui
2022-09-14 15:41 ` Thomas Zimmermann
2022-09-14 16:25 ` Wang Yugui [this message]
2022-09-15 12:54 ` Thomas Zimmermann
2022-09-15 14:41 ` Wang Yugui
2022-09-20 7:57 ` Thomas Zimmermann
2022-09-20 9:02 ` Wang Yugui
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