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fbcon: don't suspend/resume when vc is graphics mode

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Don't need to do suspend/resume for fbcon in graphic mode.

Doing this may cause error, eg:
  At the beginning, starting the Xorg with single screen and then an
  external screen was plugged in. After logging out in Xorg, fbdev
  info may using screen which is connected later on for info always
  using first connected connector in list in func 'drm_setup_crtcs_fb'.
  Then, S3 executed, fbcon found that the information did not match
  and do atomic to switch fb. However, Xorg will not re-bind the crtc
  fb but continues doing ioctl. At this time, the fb is incorrect.

With some modifications by Helge Deller.

Signed-off-by: Lu Yao <yaolu@kylinos.cn>
Signed-off-by: Helge Deller <deller@gmx.de>
This commit is contained in:
Lu Yao 2026-04-30 14:01:37 +08:00 committed by Helge Deller
parent 92a91dc8bd
commit 70d9d5f5fc
1 changed files with 6 additions and 3 deletions
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9
drivers/video/fbdev/core/fbcon.c
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@ -2601,8 +2601,9 @@ void fbcon_suspended(struct fb_info *info)
return;
vc = vc_cons[par->currcon].d;
/* Clear cursor, restore saved data */
fbcon_cursor(vc, false);
/* Clear cursor, restore saved data when in text mode */
if ((vc->vc_mode == KD_TEXT) && con_is_visible(vc))
fbcon_cursor(vc, false);
}
void fbcon_resumed(struct fb_info *info)
@ -2614,7 +2615,9 @@ void fbcon_resumed(struct fb_info *info)
return;
vc = vc_cons[par->currcon].d;
update_screen(vc);
/* Update screen when in text mode only */
if ((vc->vc_mode == KD_TEXT) && con_is_visible(vc))
update_screen(vc);
}
static void fbcon_modechanged(struct fb_info *info)