From: Hihn, J. <Jas...@ve...> - 2004-04-06 17:23:21
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There is a i2c interface between the card and the monitor that tells it what the monitor's capabilities are. If your monitor can't do it, it won't let you, because you can damage hardware that way. 15bit I think dates back to some [matrox?] cards, circa 1995. No one else really had/supported that.=20 -----Original Message----- From: Jean Delvare [mailto:kh...@li...]=20 Sent: Tuesday, April 06, 2004 12:13 PM To: lin...@li... Subject: Re: [Linux-fbdev-users] radeonfb: strange blue lines after 'setterm-inversescreen on' > This is a step in the right direction: >=20 > 1600x1200-8@75: ok > 1600x1200-16@75: blue screen > 1600x1200-24@75: 'no mode found' in dmesg? > 1600x1200-32@75: blue screen Just tried, same here (Radeon 9200 Ya). If I ask for 15-bit I get 16, if I ask for 24 I get 8. 8 is OK WRT blue background, 16 and 32 are not. BTW, how do you get 75Hz vertical refresh? I just can't. Whatever I ask through lilo, I end up with 60Hz (both fbset and the screen's OSD agree). Thanks. --=20 Jean Delvare http://www.ensicaen.ismra.fr/~delvare/ ------------------------------------------------------- This SF.Net email is sponsored by: IBM Linux Tutorials Free Linux tutorial presented by Daniel Robbins, President and CEO of GenToo technologies. Learn everything from fundamentals to system administration.http://ads.osdn.com/?ad_id=3D1470&alloc_id=3D3638&op=3Dcli= ck _______________________________________________ Linux-fbdev-users mailing list Lin...@li... https://lists.sourceforge.net/lists/listinfo/linux-fbdev-users |
From: Jean D. <kh...@li...> - 2004-04-06 19:00:32
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> There is a i2c interface between the card and the monitor that tells > it what the monitor's capabilities are. If your monitor can't do it, > it won't let you, because you can damage hardware that way. It's a Hyundai Q17, capable of 1280x1024@75. But the docs say that 60Hz is recommended so maybe that's what it says to the Radeon board over the I2C bus. After all, it's a TFT display, maybe it doesn't really care about the frequency? -- Jean Delvare http://www.ensicaen.ismra.fr/~delvare/ |
From: Geert U. <ge...@li...> - 2004-04-07 08:18:23
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On Tue, 6 Apr 2004, Hihn, Jason wrote: > 15bit I think dates back to some [matrox?] cards, circa 1995. No one > else really had/supported that. Many cards do both 15 (5/5/5) and 16 (5/6/5), e.g. ATI Mach64. The main disadvantage of 5/6/5 is that you cannot have accurate greyscales. Grey will always be a bit greenish or purplish, since there are no integer values x and y for which x/31 = y/63. Gr{oetje,eeting}s, Geert -- Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- ge...@li... In personal conversations with technical people, I call myself a hacker. But when I'm talking to journalists I just say "programmer" or something like that. -- Linus Torvalds |