From: Helge Deller Visualize-EG, Graffiti and A4450A graphics cards on PARISC can be configured in double-buffer and standard mode, but the stifb driver supports standard mode only. This patch detects double-buffered cards more reliable. Signed-off-by: Helge Deller Signed-off-by: Antonino Daplas Signed-off-by: Andrew Morton --- drivers/video/stifb.c | 19 ++++++++++++------- 1 file changed, 12 insertions(+), 7 deletions(-) diff -puN drivers/video/stifb.c~stifb-detect-cards-in-double-buffer-mode-more-reliably drivers/video/stifb.c --- a/drivers/video/stifb.c~stifb-detect-cards-in-double-buffer-mode-more-reliably +++ a/drivers/video/stifb.c @@ -1100,13 +1100,18 @@ stifb_init_fb(struct sti_struct *sti, in /* only supported cards are allowed */ switch (fb->id) { case CRT_ID_VISUALIZE_EG: - /* look for a double buffering device like e.g. the - "INTERNAL_EG_DX1024" in the RDI precisionbook laptop - which won't work. The same device in non-double - buffering mode returns "INTERNAL_EG_X1024". */ - if (strstr(sti->outptr.dev_name, "EG_DX")) { - printk(KERN_WARNING - "stifb: ignoring '%s'. Disable double buffering in IPL menu.\n", + /* Visualize cards can run either in "double buffer" or + "standard" mode. Depending on the mode, the card reports + a different device name, e.g. "INTERNAL_EG_DX1024" in double + buffer mode and "INTERNAL_EG_X1024" in standard mode. + Since this driver only supports standard mode, we check + if the device name contains the string "DX" and tell the + user how to reconfigure the card. */ + if (strstr(sti->outptr.dev_name, "DX")) { + printk(KERN_WARNING "WARNING: stifb framebuffer driver does not " + "support '%s' in double-buffer mode.\n" + KERN_WARNING "WARNING: Please disable the double-buffer mode " + "in IPL menu (the PARISC-BIOS).\n", sti->outptr.dev_name); goto out_err0; } _