RE: [Linux-fbdev-devel] Re: Generic VESA framebuffer driver and Video card BOOT?
From: Pallipadi, Venkatesh <hidden>
Date: 2004-10-21 23:22:22
Also in:
lkml
-----Original Message----- From: Pavel Machek [mailto:pavel@ucw.cz] Sent: Thursday, October 21, 2004 4:00 PM To: Pallipadi, Venkatesh Cc: Kendall Bennett; linux-kernel@vger.kernel.org; linux-fbdev-devel@lists.sourceforge.net Subject: Re: [Linux-fbdev-devel] Re: Generic VESA framebuffer driver and Video card BOOT? Hi!quoted
quoted
The rest of the code you have above seems superfluous to meas we havequoted
quoted
never needed to do that. Then again we boot the card using the BIOS emulator, which is different because it runs within a protected machine state. Have you taken a look at the X.org code? They have code in there to POST the video card also (either using vm86() or the BIOS emulator).I have done some experiments with this video post stuff. I think this should be done using x86 emulator rather than doing in real mode. The reason being, with an userlevel emulatorwe can callquoted
it at different times during resume. The current real mode videopost doesActually Ole Rohne has patch that allows you to call real mode any time you want. Pavel
Yes. I tried Ole's patch. That helped on one of my laptops. But, on the other one it doesn't work. It goes into real mode but never returns. Both systems had Radeom 9000M cards, but one with older version of the firmware (didn't work) and one with newer version. IIRC, even Stefan had similar problems with Ole's patch. Thanks, Venki