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Daplas": Re: Yet more display troubles with 2.6.15-rc5-mm2</title><link href="/css/message.css" rel="stylesheet" type="text/css" /><link href="/css/wrap.css" rel="alternate stylesheet" type="text/css" title="wrap" /><link href="/css/nowrap.css" rel="stylesheet" type="text/css" title="nowrap" /><link href="/favicon.ico" rel="shortcut icon" /><script src="/js/simple-calendar.js" type="text/javascript"></script><script src="/js/styleswitcher.js" type="text/javascript"></script><link rel="alternate" type="application/rss+xml" title="lkml.org : last 100 messages" href="/rss.php" /><link rel="alternate" type="application/rss+xml" title="lkml.org : last messages by "Antonino A. 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Daplas"</a><ul><li><a href="/lkml/2005/12/12/155">Jesper Juhl</a><ul><li class="origin"><a href="/lkml/2005/12/13/332">"Antonino A. Daplas"</a><ul><li><a href="/lkml/2005/12/13/332">Jesper Juhl</a></li></ul></li><li><a href="/lkml/2005/12/13/103">"Antonino A. Daplas"</a><ul><li><a href="/lkml/2005/12/13/334">Jesper Juhl</a><ul><li><a href="/lkml/2005/12/13/435">"Antonino A. Daplas"</a></li></ul></li></ul></li></ul></li></ul></li></ul></td><td width="32" rowspan="2" class="c" valign="top"><img src="/images/icornerl.gif" width="32" height="32" alt="/" /></td><td class="c" rowspan="2" valign="top" style="padding-top: 1em"><table><tr><td><table><tr><td class="lp">Date</td><td class="rp" itemprop="datePublished">Tue, 13 Dec 2005 08:38:53 +0800</td></tr><tr><td class="lp">From</td><td class="rp" itemprop="author">"Antonino A. Daplas" <></td></tr><tr><td class="lp">Subject</td><td class="rp" itemprop="name">Re: Yet more display troubles with 2.6.15-rc5-mm2</td></tr></table></td><td></td></tr></table><pre itemprop="articleBody">Jesper Juhl wrote:<br />> On 12/12/05, Antonino A. Daplas <adaplas@gmail.com> wrote:<br />>> Jesper Juhl wrote:<br />>>> In addition to the problem I reported earlier about 2.6.15-rc5-mm2<br />>>> hanging at boot with vga=791 I've just discovered another problem.<br />>>><br />>>> If I boot with vga=normal (which is aparently all that works), then I<br />>>> can boot up to a nice lain text login and run startx, but if I then<br />>>> switch away from X back to a text console with ctrl+alt+f6 or if I<br />>>> shut down X, then I'm presented with a completely garbled text mode<br />>>> screen - flashing coloured blocks all over, random bits of text at<br />>>> random locations etc.<br />>>><br />>>> Also, when starting X, just before the cursor appears I normally just<br />>>> have a black screen. With this kernel I first get a short blink of a<br />>>> garbled graphics mode screeen with either what looks like just random<br />>>> pixels or sometimes with something that looks like a mangled snapshot<br />>>> of my text mode console, or if I kill X with ctrl+alt+backspace and<br />>>> then start it again (the garbled text mode console does work, although<br />>>> I'm glad I know how to touch type ;) then I sometimes get what looks<br />>>> like a snapshot of my previous X session with random pixels on top.<br />>>> The garbled graphical screen stays for just a blink of an eye, then<br />>>> it's replaced with the normal black screen and the mouse cursor.<br />>>><br />>>> 2.6.15-rc5-git1 works perfectly without these issues.<br />>> I cannot reproduce your problem...<br />>><br />> <br />>> Can you try another X driver, ie, vesa?<br />>><br />> I'm already using the vesa driver. It seems to be the only Open Source<br />> driver that'll work with this card, so i don't have any other to try.<br />> <br /><br />Ah, vesa Xorg driver with vgacon. I haven't tried that yet. Let me check if<br />I can reproduce the problem.<br /><br />>> Also, these 2 patches are present in mm but not in Linus' tree. Can<br />>> you check which of these are the culprit, if any?<br />>><br />>> <a href="http://kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.15-rc2/2.6.15-rc2-mm1/broken-out/vgacon-fix-doublescan-mode.patch">http://kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.15-rc2/2.6.15-rc2-mm1/broken-out/vgacon-fix-doublescan-mode.patch</a><br />>> <a href="http://kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.15-rc2/2.6.15-rc2-mm1/broken-out/vgacon-workaround-for-resize-bug-in-some-chipsets.patch">http://kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.15-rc2/2.6.15-rc2-mm1/broken-out/vgacon-workaround-for-resize-bug-in-some-chipsets.patch</a><br />>><br />> <br />> Since this is 2.6.15-rc5-mm2 I grabbed these two instead:<br />> <a href="http://kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.15-rc5/2.6.15-rc5-mm2/broken-out/vgacon-fix-doublescan-mode.patch">http://kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.15-rc5/2.6.15-rc5-mm2/broken-out/vgacon-fix-doublescan-mode.patch</a><br />> <a href="http://kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.15-rc5/2.6.15-rc5-mm2/broken-out/vgacon-workaround-for-resize-bug-in-some-chipsets.patch">http://kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.15-rc5/2.6.15-rc5-mm2/broken-out/vgacon-workaround-for-resize-bug-in-some-chipsets.patch</a><br />> <br />> Reverting both patches didn't fix the problem. Starting X then<br />> switching back to a text mode console still results in a completely<br />> messed up text console. X is fine, I can switch back to it no problem,<br />> but text consoles go bye-bye...<br />> <br />> Would there be any point in trying a kernel with just one of the<br />> patches reverted?<br /><br />Those 2 patches are independent, so it's possible that their side<br />effects can cancel each other out. So yes, try reversing one patch<br />at a time.<br /><br />Tony<br /><br />-<br />To unsubscribe from this list: send the line "unsubscribe linux-kernel" in<br />the body of a message to majordomo@vger.kernel.org<br />More majordomo info at <a href="http://vger.kernel.org/majordomo-info.html">http://vger.kernel.org/majordomo-info.html</a><br />Please read the FAQ at <a href="http://www.tux.org/lkml/">http://www.tux.org/lkml/</a><br /><br /></pre></td><td width="32" rowspan="2" class="c" valign="top"><img src="/images/icornerr.gif" width="32" height="32" alt="\" /></td></tr><tr><td align="right" valign="bottom"> 聽 </td></tr><tr><td align="right" valign="bottom">聽</td><td class="c" valign="bottom" style="padding-bottom: 0px"><img src="/images/bcornerl.gif" width="32" height="32" alt="\" /></td><td class="c">聽</td><td class="c" valign="bottom" style="padding-bottom: 0px"><img src="/images/bcornerr.gif" width="32" height="32" alt="/" /></td></tr><tr><td align="right" valign="top" colspan="2"> 聽 </td><td class="lm">Last update: 2005-12-13 01:41 聽聽 [from the cache]<br />漏2003-2020 <a href="http://blog.jasper.es/"><span itemprop="editor">Jasper Spaans</span></a>|hosted at <a href="https://www.digitalocean.com/?refcode=9a8e99d24cf9">Digital Ocean</a> and my Meterkast|<a href="http://blog.jasper.es/categories.html#lkml-ref">Read the blog</a></td><td>聽</td></tr></table><script language="javascript" src="/js/styleswitcher.js" type="text/javascript"></script></body></html>