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Date: Sun, 14 Jun 2009 13:27:34 +0100 From: "Dr. David Alan Gilbert" <linux@...blig.org> To: "H. Peter Anvin" <hpa@...or.com> Cc: linux-kernel@...r.kernel.org Subject: Re: 2.6.{28,30} Keyboard not working on oldish machine * H. Peter Anvin (hpa@...or.com) wrote: > Dr. David Alan Gilbert wrote: > > Hi, > > I've got an old Pentium 90 machine that's been running a 2.4.x > > kernel for a long time, seems to work OK on a 2.6.18 kernel > > but doesn't seem to like anything newer. > > > > 2.6.30 no keyboard - but otherwise OK > > 2.6.28 no keyboard - but otherwise OK > > 2.6.26 reboots just after parsing ELF (maybe one more line) > > 2.6.25 reboots almost immediately > > 2.6.18 works OK > > > > The 2.6.18 and 26 are Debian kernels (etch and lenny), the > > rest are vanilla from git. > > > > So it looks like something got fixed between 26 and 28 that > > stops the early reboot. > > > > Attached is the .config from the 2.6.30 and a dmesg from that boot. > > /proc/interrupts shows 8 interrupts on interrupt 1 from the i8042 > > but it doesn't go up if I type. I've tried a couple of different > > keyboards, so I don't think it's just a dislike for the keyboard. > > > > I can see a /sys entry for the i8042 - I just don't get any input. > > > > It has an ISA VGA card (Trident 1M) (I needed the PCI slots > > for another net card!). > > > > I compiled it on a 64bit Ubuntu machine. > > > > [ 0.000000] Linux version 2.6.302.6.30gort1 (dg@...ros) (gcc version 4.4.0 (Ubuntu 4.4.0-5ubuntu1) ) #2 Sat Jun 13 18:18:17 BST 2009 > > It would be good to try an unmodified 2.6.30 kernel here... It is unmodified - I just set the local version during the config (and forgot I should have put a - in). > > [ 0.000000] KERNEL supported cpus: > > [ 0.000000] Intel GenuineIntel > > [ 0.000000] AMD AuthenticAMD > > [ 0.000000] NSC Geode by NSC > > [ 0.000000] Cyrix CyrixInstead > > [ 0.000000] Centaur CentaurHauls > > [ 0.000000] Transmeta GenuineTMx86 > > [ 0.000000] Transmeta TransmetaCPU > > [ 0.000000] UMC UMC UMC UMC > > [ 0.000000] BIOS-provided physical RAM map: > > [ 0.000000] BIOS-88: 0000000000000000 - 000000000009f000 (usable) > > [ 0.000000] BIOS-88: 0000000000100000 - 0000000004000000 (usable) > > Is 64 MB correct for this machine? Yes. > > > [ 3.147416] PNP: No PS/2 controller found. Probing ports directly. > > [ 3.174456] serio: i8042 KBD port at 0x60,0x64 irq 1 > > [ 3.174961] serio: i8042 AUX port at 0x60,0x64 irq 12 > > [ 3.186312] mice: PS/2 mouse device common for all mice > > It does, correctly, identify the keyboard and mode port, so it's > somewhat odd that it doesn't get used... Indeed. The only other observation in the older kernel that works it detects the AUX port first. Dave -- -----Open up your eyes, open up your mind, open up your code ------- / Dr. David Alan Gilbert | Running GNU/Linux on Alpha,68K| Happy \ \ gro.gilbert @ treblig.org | MIPS,x86,ARM,SPARC,PPC & HPPA | In Hex / \ _________________________|_____ http://www.treblig.org |_______/ -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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