diff options
| author | Knut Petersen <Knut_Petersen@t-online.de> | 2005-12-13 09:17:19 +0300 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2005-12-13 09:31:17 +0300 |
| commit | 39942fd8ff57c8623451bbfaffe8a184cc8b463a (patch) | |
| tree | cc40ada654e14d496dbc4db9d9d42b81c1c8f2f7 /drivers/video | |
| parent | 4e1567d3aad9bae0ecc5bb047179cd026bfb035c (diff) | |
| download | linux-39942fd8ff57c8623451bbfaffe8a184cc8b463a.tar.xz | |
[PATCH] fbdev: fix switch to KD_TEXT, enhanced version
Every framebuffer driver relies on the assumption that the set_par()
function of the driver is called before drawing functions and other
functions dependent on the hardware state are executed.
Whenever you switch from X to a framebuffer console for the very first
time, there is a chance that a broken X system has _not_ set the mode to
KD_GRAPHICS, thus the vt and framebuffer code executes a screen redraw and
several other functions before a set_par() is executed. This is believed
to be not a bug of linux but a bug of X/xdm. At least some X releases used
by SuSE and Debian show this behaviour.
There was a 2nd case, but that has been fixed by Antonino Daplas on
10-dec-2005.
This patch allows drivers to set a flag to inform fbcon_switch() that they
prefer a set_par() call on every console switch, working around the
problems caused by the broken X releases.
The flag will be used by the next release of cyblafb and might help other
drivers that assume a hardware state different to the one used by X.
As the default behaviour does not change, this patch should be acceptable
to everybody.
Signed-off-by: Knut Petersen <Knut_Petersen@t-online.de>
Acked-by: "Antonino A. Daplas" <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'drivers/video')
| -rw-r--r-- | drivers/video/console/fbcon.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/video/console/fbcon.c b/drivers/video/console/fbcon.c index 8068d2f7efe6..3660e51b2612 100644 --- a/drivers/video/console/fbcon.c +++ b/drivers/video/console/fbcon.c @@ -2103,7 +2103,8 @@ static int fbcon_switch(struct vc_data *vc) fb_set_var(info, &var); ops->var = info->var; - if (old_info != NULL && old_info != info) { + if (old_info != NULL && (old_info != info || + info->flags & FBINFO_MISC_ALWAYS_SETPAR)) { if (info->fbops->fb_set_par) info->fbops->fb_set_par(info); fbcon_del_cursor_timer(old_info); |