From: Paul Menzel <pmenzel@molgen.mpg.de>
To: Thomas Zimmermann <tzimmermann@suse.de>
Cc: "Z. Liu" <liuzx@knownsec.com>, Helge Deller <deller@gmx.de>,
linux-fbdev@vger.kernel.org, it+linux-fbdev@molgen.mpg.de
Subject: Re: Why is mgag200 not used over matroxfb?
Date: Tue, 3 Jan 2023 17:20:06 +0100 [thread overview]
Message-ID: <c11a7128-ec34-c497-e012-577a4928dc94@molgen.mpg.de> (raw)
In-Reply-To: <7b85b832-e6fd-fe42-c6a1-93ebb591383c@molgen.mpg.de>
Dear Thomas,
I have to correct myself.
Am 16.12.22 um 14:16 schrieb Paul Menzel:
> Am 16.12.22 um 13:27 schrieb Thomas Zimmermann:
>
>> Am 15.12.22 um 17:39 schrieb Paul Menzel:
>
> […]
>
>>> Between Linux 5.10.103 and 5.10.110/5.15.77, matrixfb fails to load.
>>
>> Off-topic, but related. matroxfb is obsolete and there's a maintained
>> DRM replacement (mgag200) for this hardware.
>
> I also remembered something like this in the back of my head. Though I
> thought about using simpledrm (`DRM_SIMPLEDRM`), we do not build though.
>
>> Is there anything missing from mgag200 that prevents you from switching?
> No, it looks like the matroxfb modules take precedence over the mgag200
> module:
>
> $ grep -e FB_MATROX -e MGAG /boot/config-5.15.77.mx64.440
> CONFIG_DRM_MGAG200=m
> CONFIG_FB_MATROX=m
> CONFIG_FB_MATROX_MILLENIUM=y
> CONFIG_FB_MATROX_MYSTIQUE=y
> CONFIG_FB_MATROX_G=y
> CONFIG_FB_MATROX_I2C=m
> # CONFIG_FB_MATROX_MAVEN is not set
>
> $ lsmod | grep matrox
> matroxfb_base 28672 0
> matroxfb_g450 16384 1 matroxfb_base
> matroxfb_Ti3026 16384 1 matroxfb_base
> matroxfb_accel 16384 1 matroxfb_base
> matroxfb_DAC1064 20480 1 matroxfb_base
> g450_pll 16384 2 matroxfb_g450,matroxfb_DAC1064
> matroxfb_misc 20480 5 g450_pll,matroxfb_Ti3026,matroxfb_base,matroxfb_g450,matroxfb_DAC1064
The search string was incorrect. The module mgag200, is loaded:
$ lsmod | grep mgag200
mgag200 36864 0
drm_kms_helper 241664 3 mgag200
drm 524288 3 drm_kms_helper,mgag200
i2c_algo_bit 16384 1 mgag200
and it is used according to `lspci`:
$ lspci -nn -k -s 09:03.
09:03.0 VGA compatible controller [0300]: Matrox Electronics
Systems Ltd. MGA G200eW WPCM450 [102b:0532] (rev 0a)
DeviceName: Embedded Video
Subsystem: Dell MGA G200eW WPCM450 [1028:02d3]
Kernel driver in use: mgag200
Kernel modules: matroxfb_base, mgag200
So, it was only a cosmetic issue.
Kind regards,
Paul
next prev parent reply other threads:[~2023-01-03 16:20 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-12-15 16:39 matroxfb: cannot determine memory size Paul Menzel
2022-12-15 23:02 ` Helge Deller
2022-12-16 11:58 ` Paul Menzel
2022-12-16 21:21 ` Helge Deller
2022-12-19 11:58 ` Paul Menzel
2022-12-19 12:19 ` Helge Deller
2023-02-16 12:50 ` Linux regression tracking #update (Thorsten Leemhuis)
2022-12-16 12:27 ` Thomas Zimmermann
2022-12-16 13:16 ` Why is mgag200 not used over matroxfb? (was: matroxfb: cannot determine memory size) Paul Menzel
2023-01-03 16:20 ` Paul Menzel [this message]
2023-01-04 8:19 ` Why is mgag200 not used over matroxfb? Thomas Zimmermann
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