after updated kernel to 5.10, monitor become black w/ error message said: "The current input timing is not supported by the monitor display. Please change your input timing to 1920x1080@60Hz ...", so I did a git bisect, and the result is: # first bad commit: [11be60bd66d5431018d706ec623c8ece80a7f931] matroxfb: add Matrox MGA-G200eW board support Display become normal after apply following patch: diff --git a/drivers/video/fbdev/matrox/matroxfb_base.c b/drivers/video/fbdev/matrox/matroxfb_base.c index 5c82611e93d9..236521b19daf 100644 --- a/drivers/video/fbdev/matrox/matroxfb_base.c +++ b/drivers/video/fbdev/matrox/matroxfb_base.c @@ -1377,7 +1377,7 @@ static struct video_board vbG200 = { .lowlevel = &matrox_G100 }; static struct video_board vbG200eW = { - .maxvram = 0x800000, + .maxvram = 0x100000, .maxdisplayable = 0x800000, .accelID = FB_ACCEL_MATROX_MGAG200, .lowlevel = &matrox_G100 I don't really know the meaning of the value I changed, just use this value from vbG200 for a test.
Created attachment 300061 [details] [patch] fix black screen on some monitor Monitor become black w/ error message said: "The current input timing is not supported by the monitor display. Please change your input timing to 1920x1080@60Hz ...". Display show normaly after apply the patch.