Date: Mon, 3 Aug 1998 16:24:54 +0200 (CEST) From: Andre Albsmeier <andre.albsmeier@mchp.siemens.de> To: yokota@zodiac.mech.utsunomiya-u.ac.jp (Kazutaka YOKOTA) Cc: freebsd-current@FreeBSD.ORG, yokota@zodiac.mech.utsunomiya-u.ac.jp Subject: Re: screen flicker in 3.0-CURRENT Message-ID: <199808031424.QAA14695@bali.us.tld> In-Reply-To: <199808031332.WAA19278@zodiac.mech.utsunomiya-u.ac.jp> from Kazutaka YOKOTA at "Aug 3, 98 10:32:19 pm"
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> I would be grateful if anybody who are having the following problem > would apply the attached patch to /sys/i386/isa/syscons.c and report > the result to me. > > There have been reports that the screen flicker is so bad when the > mouse pointer is moved in 3.0-CURRENT and 2.2.7. 2.2.6 saw less of > the problem. It has been observed that the problem is most apparent: > > a) in notebook computers, > b) and/or in the systems with a C&T video chip. > > A possible workaround is to eliminate some I/O access to the chip. > But, as I am not sure if this is OK with other VGA chip sets, we shall > use a new configuration option SC_BAD_FLICKER. Define this option in > the kernel configuration file to remove outb()/outw() calls in question. Hmm, I had this problem quite a while on a -STABLE system since 2.2.5 However, it went away after attaching a different monitor to it. The first monitor is definately OK, I have 4 of them and they all behaved equal. The video chip is a et4000 on a low cost ISA card. The symptoms were that when the mouse was used (moused and mousepointer enabled) the screen turned blank and reappeared after moving the mouse more. -Andre To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message
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