Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752213AbXFNC2T (ORCPT ); Wed, 13 Jun 2007 22:28:19 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1750834AbXFNC2J (ORCPT ); Wed, 13 Jun 2007 22:28:09 -0400 Received: from fgwmail9.fujitsu.co.jp ([192.51.44.39]:39745 "EHLO fgwmail9.fujitsu.co.jp" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750814AbXFNC2I (ORCPT ); Wed, 13 Jun 2007 22:28:08 -0400 Message-ID: <4670A759.7090206@soft.fujitsu.com> Date: Thu, 14 Jun 2007 11:26:33 +0900 From: izumi User-Agent: Thunderbird 1.5.0.8 (Windows/20061025) MIME-Version: 1.0 To: linux-kernel@vger.kernel.org Subject: [PATCH][BUG] Fix the graphic corruption issue on IA64 machines Content-Type: multipart/mixed; boundary="------------090702090901060800060005" Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 4142 Lines: 99 This is a multi-part message in MIME format. --------------090702090901060800060005 Content-Type: text/plain; charset=ISO-2022-JP Content-Transfer-Encoding: 7bit Hi, I encountered the graphic corruption issue on IA64 machines by the following operations. 0. enable VGA console(default setting). disable serial console setting. 1. boot the system at run level 3 and login via text-mode console (/dev/tty1) as the root user. 2. disable console blanking. # setterm -blank 0 3. start X. 4. shutdown X. 5. start X again. 6. open the gnome-terminal and write someting to /dev/console. # ls -l > /dev/console The cause of this problem may be VGA console driver's misunderstanding mode(text/graphic). I confirmed this problem is fixed by the attached patch, but I don't know this is the correct fix. -------------------------------------------------------------------- VGA console driver can misunderstand the current mode(Text/Graphic) under "disable console blanking" setting. - start X --> vt_ioctl() drivers/char/vt_ioctl.c do_blank_screen(1) drivers/char/vt.c sw->con_blank(vc_cons[currcons].d, 1, 0) drivers/char/vt.c vgacon_blank() drivers/video/console/vgacon.c 　 vga_is_gfx = 1 /* enter Graphic mode */ - shutdown X --> vt_ioctl() do_unblank_screen(1) drivers/char/vt.c sw->con_blank(vc_cons[currcons].d, 0, leaving_gfx) vgacon_blank() 　 vga_is_gfx = 0 /* leave Graphic mode */ When "disable console blank" is set (=> blankinterval=0), "do_unblank_screen()" function returns without changing "blank_state", and when "blank_state" is "blank_off", "do_blank_screen() function returns without invoking sw->con_blank() function. That's why VGA console driver can misunderstand the current mode. ----------------------------------------------------------------------- Regards, Taku Izumi --------------090702090901060800060005 Content-Type: text/plain; name="vt-blank.patch" Content-Transfer-Encoding: base64 Content-Disposition: inline; filename="vt-blank.patch" Rml4IHRoZSBncmFwaGljIGNvcnJ1cHRpb24gaXNzdWUgb24gSUE2NCBtYWNoaW5lcy4KVkdB IGNvbnNvbGUgZHJpdmVyIGNhbiBtaXN1bmRlcnN0YW5kIHRoZSBjdXJyZW50IG1vZGUoVGV4 dC9HcmFwaGljKSB1bmRlciAKImRpc2FibGUgY29uc29sZSBibGFua2luZyIgc2V0dGluZy4g V2hlbiAiZGlzYWJsZSBjb25zb2xlIGJsYW5rIiBpcyBzZXQgKGJsYW5raW50ZXJ2YWw9MCks ICJkb191bmJsYW5rX3NjcmVlbigpIiBmdW5jdGlvbiByZXR1cm5zIHdpdGhvdXQgY2hhbmdp bmcgImJsYW5rX3N0YXRlIiwgYW5kIHdoZW4gImJsYW5rX3N0YXRlIiBpcyAiYmxhbmtfb2Zm IiwgImRvX2JsYW5rX3NjcmVlbigpIGZ1bmN0aW9uIHJldHVybnMgd2l0aG91dCBpbnZva2lu ZyBzdy0+Y29uX2JsYW5rKCkgZnVuY3Rpb24uIFRoYXQncyB3aHkgVkdBIGNvbnNvbGUgZHJp dmVyIGNhbiBtaXN1bmRlcnN0YW5kIHRoZSBjdXJyZW50IG1vZGUuCgpTaWduZWQtb2ZmLWJ5 OiBOb2J1aGlybyBUYWNoaW5vIDxudGFjaGlub0ByZWRoYXQuY29tPgpTaWduZWQtb2ZmLWJ5 OiBUYWt1IEl6dW1pIDxpenVtaTIwMDVAc29mdC5mdWppdHN1LmNvbT4KLS0tCiBkcml2ZXJz L2NoYXIvdnQuYyB8ICAgIDIgKy0KIDEgZmlsZXMgY2hhbmdlZCwgMSBpbnNlcnRpb24oKyks IDEgZGVsZXRpb24oLSkKCgpJbmRleDogbGludXgtMi42LjIxLjUvZHJpdmVycy9jaGFyL3Z0 LmMKPT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09 PT09PT09PT09PT09PT09PT09PT09Ci0tLSBsaW51eC0yLjYuMjEuNS5vcmcvZHJpdmVycy9j aGFyL3Z0LmMJMjAwNy0wNi0xMyAxMjowMzoxMS4wMDAwMDAwMDAgKzA5MDAKKysrIGxpbnV4 LTIuNi4yMS41L2RyaXZlcnMvY2hhci92dC5jCTIwMDctMDYtMTMgMTI6MDc6NDguMDAwMDAw MDAwICswOTAwCkBAIC0zNDE5LDEyICszNDE5LDEyIEBAIHZvaWQgZG9fdW5ibGFua19zY3Jl ZW4oaW50IGxlYXZpbmdfZ2Z4KQogCQlyZXR1cm47CiAJfQogCXZjID0gdmNfY29uc1tmZ19j b25zb2xlXS5kOworCWJsYW5rX3N0YXRlID0gYmxhbmtfbm9ybWFsX3dhaXQ7CiAJaWYgKHZj LT52Y19tb2RlICE9IEtEX1RFWFQpCiAJCXJldHVybjsgLyogYnV0IGxlYXZlIGNvbnNvbGVf YmxhbmtlZCAhPSAwICovCiAKIAlpZiAoYmxhbmtpbnRlcnZhbCkgewogCQltb2RfdGltZXIo JmNvbnNvbGVfdGltZXIsIGppZmZpZXMgKyBibGFua2ludGVydmFsKTsKLQkJYmxhbmtfc3Rh dGUgPSBibGFua19ub3JtYWxfd2FpdDsKIAl9CiAKIAljb25zb2xlX2JsYW5rZWQgPSAwOwo= --------------090702090901060800060005-- - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/