From mboxrd@z Thu Jan 1 00:00:00 1970 From: conrad@bungled.net (Nathan Conrad) Subject: Wrong frequencies sometimes on Sony Vaio Athlon4 Date: Tue, 29 Nov 2005 08:54:23 -0500 Message-ID: <20051129135423.GA20258@bungled.net> Mime-Version: 1.0 Return-path: Content-Disposition: inline List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: cpufreq-bounces@lists.linux.org.uk Errors-To: cpufreq-bounces+glkc-cpufreq=m.gmane.org+glkc-cpufreq=m.gmane.org@lists.linux.org.uk Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: cpufreq@lists.linux.org.uk Hi, I have a 1.2 GHz Athlon4 CPU on my Sony Vaio PCG-FXA49 laptop. I use the powernow CPU scaling. Sometimes (a few percent of the time), the driver records my laptop's CPU as the wrong speed. For example, right now the following speeds are available: 1292256 1076880 861504 646128 538440 The first should be almost exactly 1.2 GHz while the last should be 500 MHz. /proc/cpuinfo: processor : 0 vendor_id : AuthenticAMD cpu family : 6 model : 6 model name : mobile AMD Athlon(tm) 4 stepping : 2 cpu MHz : 1076.885 cache size : 256 KB fdiv_bug : no hlt_bug : no f00f_bug : no coma_bug : no fpu : yes fpu_exception : yes cpuid level : 1 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 sep mtrr pge mca cmov pat pse36 mmx fxsr sse syscall mp mmxext 3dnowext 3dnow bogomips : 2144.24 dmesg reports: CPU: After generic identify, caps: 0383f9ff c1cbf9ff 00000000 00000000 00000000 00000000 00000000 CPU: After vendor identify, caps: 0383f9ff c1cbf9ff 00000000 00000000 00000000 00000000 00000000 CPU: L1 I Cache: 64K (64 bytes/line), D cache 64K (64 bytes/line) CPU: L2 Cache: 256K (64 bytes/line) CPU: After all inits, caps: 0383f9ff c1cbf9ff 00000000 00000020 00000000 00000000 00000000 CPU: AMD mobile AMD Athlon(tm) 4 stepping 02 powernow: PowerNOW! Technology present. Can scale: frequency and voltage. Detected 1292.262 MHz processor. powernow: No PST tables match this cpuid (0x762) powernow: This is indicative of a broken BIOS. powernow: Trying ACPI perflib powernow: Minimum speed 538 MHz. Maximum speed 1292 MHz.